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Vulnerability Details :

CVE-2021-26421

Summary
Assigner-microsoft
Assigner Org ID-f38d906d-7342-40ea-92c1-6c4a2c6478c8
Published At-11 May, 2021 | 19:11
Updated At-03 Aug, 2024 | 20:26
Rejected At-
Credits

Skype for Business and Lync Spoofing Vulnerability

Skype for Business and Lync Spoofing Vulnerability

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:microsoft
Assigner Org ID:f38d906d-7342-40ea-92c1-6c4a2c6478c8
Published At:11 May, 2021 | 19:11
Updated At:03 Aug, 2024 | 20:26
Rejected At:
▼CVE Numbering Authority (CNA)
Skype for Business and Lync Spoofing Vulnerability

Skype for Business and Lync Spoofing Vulnerability

Affected Products
Vendor
Microsoft CorporationMicrosoft
Product
Skype for Business Server 2015 CU11
CPEs
  • cpe:2.3:a:microsoft:skype_for_business_server:2015:cumulative_update_11:*:*:*:*:*:*
Platforms
  • Unknown
Versions
Affected
  • From 2015 CU11 before 2046.369 (custom)
Vendor
Microsoft CorporationMicrosoft
Product
Microsoft Lync Server 2013 CU10
CPEs
  • cpe:2.3:a:microsoft:lync_server:2013:cumulative_update_10:*:*:*:*:*:*
Platforms
  • Unknown
Versions
Affected
  • From 8308.0 before 8308.1144 (custom)
Problem Types
TypeCWE IDDescription
ImpactN/ASpoofing
Type: Impact
CWE ID: N/A
Description: Spoofing
Metrics
VersionBase scoreBase severityVector
3.16.5MEDIUM
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:L/A:N/E:U/RL:O/RC:C
Version: 3.1
Base score: 6.5
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:L/A:N/E:U/RL:O/RC:C
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26421
x_refsource_MISC
Hyperlink: https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26421
Resource:
x_refsource_MISC
▼Authorized Data Publishers (ADP)
CVE Program Container
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26421
x_refsource_MISC
x_transferred
Hyperlink: https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26421
Resource:
x_refsource_MISC
x_transferred
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:secure@microsoft.com
Published At:11 May, 2021 | 19:15
Updated At:02 Aug, 2023 | 00:15

Skype for Business and Lync Spoofing Vulnerability

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Primary3.16.5MEDIUM
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:L/A:N
Secondary3.17.1HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N
Primary2.05.8MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:N
Type: Primary
Version: 3.1
Base score: 6.5
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:L/A:N
Type: Secondary
Version: 3.1
Base score: 7.1
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N
Type: Primary
Version: 2.0
Base score: 5.8
Base severity: MEDIUM
Vector:
AV:N/AC:M/Au:N/C:P/I:P/A:N
CPE Matches

Microsoft Corporation
microsoft
>>lync_server>>2013
cpe:2.3:a:microsoft:lync_server:2013:cumulative_update_10:*:*:*:*:*:*
Microsoft Corporation
microsoft
>>skype_for_business_server>>2015
cpe:2.3:a:microsoft:skype_for_business_server:2015:cumulative_update_11:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
NVD-CWE-noinfoPrimarynvd@nist.gov
CWE ID: NVD-CWE-noinfo
Type: Primary
Source: nvd@nist.gov
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26421secure@microsoft.com
Patch
Vendor Advisory
Hyperlink: https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26421
Source: secure@microsoft.com
Resource:
Patch
Vendor Advisory

Change History

0
Information is not available yet

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Matching Score-8
Assigner-Microsoft Corporation
CVSS Score-5.4||MEDIUM
EPSS-0.95% / 75.41%
||
7 Day CHG~0.00%
Published-10 Oct, 2018 | 13:00
Updated-05 Aug, 2024 | 07:02
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

A security feature bypass vulnerability exists in Microsoft Edge when the Edge Content Security Policy (CSP) fails to properly validate certain specially crafted documents, aka "Microsoft Edge Security Feature Bypass Vulnerability." This affects Microsoft Edge. This CVE ID is unique from CVE-2018-8530.

Action-Not Available
Vendor-Microsoft Corporation
Product-edgewindows_10Microsoft Edge
CWE ID-CWE-20
Improper Input Validation
CVE-2018-8448
Matching Score-8
Assigner-Microsoft Corporation
ShareView Details
Matching Score-8
Assigner-Microsoft Corporation
CVSS Score-5.4||MEDIUM
EPSS-0.54% / 66.75%
||
7 Day CHG~0.00%
Published-10 Oct, 2018 | 13:00
Updated-05 Aug, 2024 | 06:54
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

An elevation of privilege vulnerability exists when Microsoft Exchange Outlook Web Access (OWA) fails to properly handle web requests, aka "Microsoft Exchange Server Elevation of Privilege Vulnerability." This affects Microsoft Exchange Server.

Action-Not Available
Vendor-Microsoft Corporation
Product-exchange_serverMicrosoft Exchange Server
CWE ID-CWE-79
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE-2018-8567
Matching Score-8
Assigner-Microsoft Corporation
ShareView Details
Matching Score-8
Assigner-Microsoft Corporation
CVSS Score-5.4||MEDIUM
EPSS-0.71% / 71.44%
||
7 Day CHG~0.00%
Published-14 Nov, 2018 | 01:00
Updated-05 Aug, 2024 | 07:02
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

An elevation of privilege vulnerability exists when Microsoft Edge does not properly enforce cross-domain policies, which could allow an attacker to access information from one domain and inject it into another domain, aka "Microsoft Edge Elevation of Privilege Vulnerability." This affects Microsoft Edge.

Action-Not Available
Vendor-Microsoft Corporation
Product-edgewindows_serverwindows_10Microsoft Edge
CVE-2016-6154
Matching Score-8
Assigner-MITRE Corporation
ShareView Details
Matching Score-8
Assigner-MITRE Corporation
CVSS Score-6.1||MEDIUM
EPSS-0.29% / 51.88%
||
7 Day CHG~0.00%
Published-23 Aug, 2019 | 21:06
Updated-06 Aug, 2024 | 01:22
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

The authentication applet in Watchguard Fireware 11.11 Operating System has reflected XSS (this can also cause an open redirect).

Action-Not Available
Vendor-n/aWatchGuard Technologies, Inc.Microsoft Corporation
Product-windowsfirewaren/a
CWE ID-CWE-79
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE ID-CWE-601
URL Redirection to Untrusted Site ('Open Redirect')
CVE-2016-3378
Matching Score-8
Assigner-Microsoft Corporation
ShareView Details
Matching Score-8
Assigner-Microsoft Corporation
CVSS Score-7.4||HIGH
EPSS-2.93% / 85.89%
||
7 Day CHG~0.00%
Published-14 Sep, 2016 | 10:00
Updated-12 Apr, 2025 | 10:46
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Open redirect vulnerability in Microsoft Exchange Server 2013 SP1, 2013 Cumulative Update 12, 2013 Cumulative Update 13, 2016 Cumulative Update 1, and 2016 Cumulative Update 2 allows remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via a crafted URL, aka "Microsoft Exchange Open Redirect Vulnerability."

Action-Not Available
Vendor-n/aMicrosoft Corporation
Product-exchange_servern/a
CWE ID-CWE-20
Improper Input Validation
CVE-2016-10932
Matching Score-8
Assigner-MITRE Corporation
ShareView Details
Matching Score-8
Assigner-MITRE Corporation
CVSS Score-4.8||MEDIUM
EPSS-0.20% / 42.62%
||
7 Day CHG~0.00%
Published-26 Aug, 2019 | 12:01
Updated-06 Aug, 2024 | 03:38
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

An issue was discovered in the hyper crate before 0.9.4 for Rust on Windows. There is an HTTPS man-in-the-middle vulnerability because hostname verification was omitted.

Action-Not Available
Vendor-hypern/aMicrosoft Corporation
Product-windowshypern/a
CWE ID-CWE-254
Not Available
CVE-2016-1030
Matching Score-8
Assigner-Adobe Systems Incorporated
ShareView Details
Matching Score-8
Assigner-Adobe Systems Incorporated
CVSS Score-8.1||HIGH
EPSS-1.10% / 77.14%
||
7 Day CHG~0.00%
Published-09 Apr, 2016 | 01:00
Updated-12 Apr, 2025 | 10:46
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Adobe Flash Player before 18.0.0.343 and 19.x through 21.x before 21.0.0.213 on Windows and OS X and before 11.2.202.616 on Linux allows attackers to bypass intended access restrictions via unspecified vectors.

Action-Not Available
Vendor-n/aAdobe Inc.Linux Kernel Organization, IncGoogle LLCApple Inc.Microsoft Corporation
Product-flash_playerchrome_oslinux_kerneliphone_osflash_player_desktop_runtimeair_desktop_runtimeair_sdkair_sdk_\&_compilerwindowswindows_8.1mac_os_xandroidwindows_10n/a
CVE-2016-0128
Matching Score-8
Assigner-Microsoft Corporation
ShareView Details
Matching Score-8
Assigner-Microsoft Corporation
CVSS Score-6.8||MEDIUM
EPSS-34.58% / 96.86%
||
7 Day CHG~0.00%
Published-12 Apr, 2016 | 23:00
Updated-12 Apr, 2025 | 10:46
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

The SAM and LSAD protocol implementations in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, and Windows 10 Gold and 1511 do not properly establish an RPC channel, which allows man-in-the-middle attackers to perform protocol-downgrade attacks and impersonate users by modifying the client-server data stream, aka "Windows SAM and LSAD Downgrade Vulnerability" or "BADLOCK."

Action-Not Available
Vendor-n/aMicrosoft Corporation
Product-windows_7windows_server_2008windows_rt_8.1windows_vistawindows_server_2012windows_8.1windows_10n/a
CVE-2015-6112
Matching Score-8
Assigner-Microsoft Corporation
ShareView Details
Matching Score-8
Assigner-Microsoft Corporation
CVSS Score-5.8||MEDIUM
EPSS-7.35% / 91.32%
||
7 Day CHG~0.00%
Published-11 Nov, 2015 | 11:00
Updated-12 Apr, 2025 | 10:46
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

SChannel in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server 2012 Gold and R2, and Windows RT Gold and 8.1 lacks the required extended master-secret binding support to ensure that a server's X.509 certificate is the same during renegotiation as it was before renegotiation, which allows man-in-the-middle attackers to obtain sensitive information or modify TLS session data via a "triple handshake attack," aka "Schannel TLS Triple Handshake Vulnerability."

Action-Not Available
Vendor-n/aMicrosoft Corporation
Product-windows_rtwindows_7windows_8windows_server_2008windows_rt_8.1windows_vistawindows_server_2012windows_8.1n/a
CWE ID-CWE-20
Improper Input Validation
CVE-2021-34469
Matching Score-8
Assigner-Microsoft Corporation
ShareView Details
Matching Score-8
Assigner-Microsoft Corporation
CVSS Score-8.2||HIGH
EPSS-0.84% / 73.70%
||
7 Day CHG~0.00%
Published-14 Jul, 2021 | 17:54
Updated-04 Aug, 2024 | 00:12
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Microsoft Office Security Feature Bypass Vulnerability

Microsoft Office Security Feature Bypass Vulnerability

Action-Not Available
Vendor-Microsoft Corporation
Product-365_appsofficeMicrosoft 365 Apps for EnterpriseMicrosoft Office 2013 Service Pack 1Microsoft Office 2016Microsoft Office 2019
CVE-2021-24104
Matching Score-8
Assigner-Microsoft Corporation
ShareView Details
Matching Score-8
Assigner-Microsoft Corporation
CVSS Score-4.6||MEDIUM
EPSS-0.54% / 66.50%
||
7 Day CHG~0.00%
Published-11 Mar, 2021 | 15:02
Updated-03 Aug, 2024 | 19:21
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Microsoft SharePoint Server Spoofing Vulnerability

Microsoft SharePoint Server Spoofing Vulnerability

Action-Not Available
Vendor-Microsoft Corporation
Product-sharepoint_serversharepoint_foundationsharepoint_enterprise_serverMicrosoft SharePoint Server 2019Microsoft SharePoint Enterprise Server 2016Microsoft SharePoint Foundation 2013 Service Pack 1
CVE-2021-21125
Matching Score-8
Assigner-Chrome
ShareView Details
Matching Score-8
Assigner-Chrome
CVSS Score-8.1||HIGH
EPSS-2.93% / 85.87%
||
7 Day CHG~0.00%
Published-09 Feb, 2021 | 13:56
Updated-03 Aug, 2024 | 18:01
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Insufficient policy enforcement in File System API in Google Chrome on Windows prior to 88.0.4324.96 allowed a remote attacker to bypass filesystem restrictions via a crafted HTML page.

Action-Not Available
Vendor-Google LLCMicrosoft Corporation
Product-chromeedge_chromiumChrome
CWE ID-CWE-59
Improper Link Resolution Before File Access ('Link Following')
CVE-2021-21172
Matching Score-8
Assigner-Chrome
ShareView Details
Matching Score-8
Assigner-Chrome
CVSS Score-8.1||HIGH
EPSS-0.42% / 61.00%
||
7 Day CHG~0.00%
Published-09 Mar, 2021 | 17:46
Updated-03 Aug, 2024 | 18:01
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Insufficient policy enforcement in File System API in Google Chrome on Windows prior to 89.0.4389.72 allowed a remote attacker to bypass filesystem restrictions via a crafted HTML page.

Action-Not Available
Vendor-Google LLCMicrosoft CorporationFedora ProjectDebian GNU/Linux
Product-chromewindowsfedoradebian_linuxChrome
CVE-2021-1730
Matching Score-8
Assigner-Microsoft Corporation
ShareView Details
Matching Score-8
Assigner-Microsoft Corporation
CVSS Score-5.4||MEDIUM
EPSS-2.44% / 84.57%
||
7 Day CHG~0.00%
Published-25 Feb, 2021 | 23:01
Updated-03 Aug, 2024 | 16:18
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Microsoft Exchange Server Spoofing Vulnerability

<p>A spoofing vulnerability exists in Microsoft Exchange Server which could result in an attack that would allow a malicious actor to impersonate the user.</p> <p>This update addresses this vulnerability.</p> <p>To prevent these types of attacks, Microsoft recommends customers to download inline images from different DNSdomains than the rest of OWA. Please see further instructions in the FAQ to put in place this mitigations.</p>

Action-Not Available
Vendor-Microsoft Corporation
Product-exchange_serverMicrosoft Exchange Server 2016 Cumulative Update 18Microsoft Exchange Server 2019 Cumulative Update 7
CVE-2024-30056
Matching Score-8
Assigner-Microsoft Corporation
ShareView Details
Matching Score-8
Assigner-Microsoft Corporation
CVSS Score-7.1||HIGH
EPSS-7.40% / 91.35%
||
7 Day CHG~0.00%
Published-25 May, 2024 | 17:12
Updated-03 May, 2025 | 00:06
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Microsoft Edge (Chromium-based) Information Disclosure Vulnerability

Microsoft Edge (Chromium-based) Information Disclosure Vulnerability

Action-Not Available
Vendor-Microsoft Corporation
Product-edge_chromiumMicrosoft Edge (Chromium-based)
CWE ID-CWE-359
Exposure of Private Personal Information to an Unauthorized Actor
CVE-2017-11932
Matching Score-8
Assigner-Microsoft Corporation
ShareView Details
Matching Score-8
Assigner-Microsoft Corporation
CVSS Score-8.1||HIGH
EPSS-11.46% / 93.32%
||
7 Day CHG~0.00%
Published-12 Dec, 2017 | 21:00
Updated-20 Apr, 2025 | 01:37
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Microsoft Exchange Server 2016 CU5 and Microsoft Exchange Server 2016 CU5 allow a spoofing vulnerability due to the way Outlook Web Access (OWA) validates web requests, aka "Microsoft Exchange Spoofing Vulnerability".

Action-Not Available
Vendor-Microsoft Corporation
Product-exchange_serverMicrosoft Exchange Server
CWE ID-CWE-20
Improper Input Validation
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