Logo
-

Byte Open Security

(ByteOS Network)

Log In

Sign Up

ByteOS

Security
Vulnerability Details
Registries
Custom Views
Weaknesses
Attack Patterns
Filters & Tools
Vulnerability Details :

CVE-2026-42919

Summary
Assigner-f5
Assigner Org ID-9dacffd4-cb11-413f-8451-fbbfd4ddc0ab
Published At-13 May, 2026 | 14:12
Updated At-14 May, 2026 | 03:56
Rejected At-
Credits

F5 BIG-IP Appliance Mode Vulnerability

A vulnerability exists in BIG-IP systems that may allow an authenticated attacker with administrative access to escalate their privileges. A successful exploit may allow the attacker to cross a security boundary.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

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:f5
Assigner Org ID:9dacffd4-cb11-413f-8451-fbbfd4ddc0ab
Published At:13 May, 2026 | 14:12
Updated At:14 May, 2026 | 03:56
Rejected At:
▼CVE Numbering Authority (CNA)
F5 BIG-IP Appliance Mode Vulnerability

A vulnerability exists in BIG-IP systems that may allow an authenticated attacker with administrative access to escalate their privileges. A successful exploit may allow the attacker to cross a security boundary.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Affected Products
Vendor
F5, Inc.F5
Product
BIG-IP
Modules
  • All Modules
Default Status
unknown
Versions
Affected
  • From 21.0.0 before 21.0.0.1 (custom)
  • From 17.5.0 before 17.5.1.4 (custom)
  • From 17.1.0 before 17.1.3.1 (custom)
  • From 16.1.0 before * (custom)
Unaffected
  • From 21.1.0 before * (custom)
Problem Types
TypeCWE IDDescription
CWECWE-121CWE-121 Stack-based Buffer Overflow
Type: CWE
CWE ID: CWE-121
Description: CWE-121 Stack-based Buffer Overflow
Metrics
VersionBase scoreBase severityVector
3.16.7MEDIUM
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:H
4.07.1HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N
Version: 3.1
Base score: 6.7
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:H
Version: 4.0
Base score: 7.1
Base severity: HIGH
Vector:
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
finder
F5
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://my.f5.com/manage/s/article/K000158971
vendor-advisory
patch
Hyperlink: https://my.f5.com/manage/s/article/K000158971
Resource:
vendor-advisory
patch
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
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
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:f5sirt@f5.com
Published At:13 May, 2026 | 16:16
Updated At:13 May, 2026 | 16:27

A vulnerability exists in BIG-IP systems that may allow an authenticated attacker with administrative access to escalate their privileges. A successful exploit may allow the attacker to cross a security boundary.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

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
Secondary4.07.1HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Primary3.16.7MEDIUM
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:H
Type: Secondary
Version: 4.0
Base score: 7.1
Base severity: HIGH
Vector:
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Type: Primary
Version: 3.1
Base score: 6.7
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:H
CPE Matches
Weaknesses
CWE IDTypeSource
CWE-121Primaryf5sirt@f5.com
CWE ID: CWE-121
Type: Primary
Source: f5sirt@f5.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://my.f5.com/manage/s/article/K000158971f5sirt@f5.com
N/A
Hyperlink: https://my.f5.com/manage/s/article/K000158971
Source: f5sirt@f5.com
Resource: N/A

Change History

0
Information is not available yet

Similar CVEs

6Records found
CVE-2026-41956
Matching Score-6
Assigner-F5, Inc.
ShareView Details
Matching Score-6
Assigner-F5, Inc.
CVSS Score-8.7||HIGH
EPSS-0.07% / 21.81%
||
7 Day CHG~0.00%
Published-13 May, 2026 | 14:12
Updated-13 May, 2026 | 16:27
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
BIG-IP TMM Vulnerability

When a classification profile is configured on a UDP virtual server, undisclosed requests can cause the Traffic Management Microkernel (TMM) to terminate.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Action-Not Available
Vendor-F5, Inc.
Product-BIG-IPBIG-IP Next CNFBIG-IP Next for Kubernetes
CWE ID-CWE-121
Stack-based Buffer Overflow
CVE-2024-31079
Matching Score-6
Assigner-F5, Inc.
ShareView Details
Matching Score-6
Assigner-F5, Inc.
CVSS Score-4.8||MEDIUM
EPSS-0.48% / 65.41%
||
7 Day CHG~0.00%
Published-29 May, 2024 | 16:02
Updated-13 Feb, 2025 | 17:47
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
NGINX HTTP/3 QUIC vulnerability

When NGINX Plus or NGINX OSS are configured to use the HTTP/3 QUIC module, undisclosed HTTP/3 requests can cause NGINX worker processes to terminate or cause other potential impact. This attack requires that a request be specifically timed during the connection draining process, which the attacker has no visibility and limited influence over.

Action-Not Available
Vendor-Fedora ProjectF5, Inc.
Product-nginx_plusnginx_open_sourcefedoraNGINX Open SourceNGINX Plusnginxnginx_plus
CWE ID-CWE-121
Stack-based Buffer Overflow
CWE ID-CWE-787
Out-of-bounds Write
CVE-2024-23982
Matching Score-6
Assigner-F5, Inc.
ShareView Details
Matching Score-6
Assigner-F5, Inc.
CVSS Score-7.5||HIGH
EPSS-0.31% / 54.07%
||
7 Day CHG~0.00%
Published-14 Feb, 2024 | 16:35
Updated-12 Dec, 2024 | 19:07
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
BIG-IP PEM vulnerability

When a BIG-IP PEM classification profile is configured on a UDP virtual server, undisclosed requests can cause the Traffic Management Microkernel (TMM) to terminate. This issue affects classification engines using signatures released between 09-08-2022 and 02-16-2023. See the table in the F5 Security Advisory for a complete list of affected classification signature files.  NOTE: Software versions which have reached End of Technical Support (EoTS) are not evaluated

Action-Not Available
Vendor-F5, Inc.
Product-big-ip_policy_enforcement_managerBIG-IPbig-ip_pem
CWE ID-CWE-121
Stack-based Buffer Overflow
CWE ID-CWE-787
Out-of-bounds Write
CVE-2025-53521
Matching Score-6
Assigner-F5, Inc.
ShareView Details
Matching Score-6
Assigner-F5, Inc.
CVSS Score-9.3||CRITICAL
EPSS-7.45% / 91.84%
||
7 Day CHG~0.00%
Published-15 Oct, 2025 | 13:55
Updated-31 Mar, 2026 | 17:12
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Known KEV||Action Due Date - 2026-03-30||Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
BigIP APM Vulnerability

When a BIG-IP APM access policy is configured on a virtual server, specific malicious traffic can lead to Remote Code Execution (RCE).   Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Action-Not Available
Vendor-F5, Inc.
Product-big-ip_access_policy_managerBIG-IPBIG-IP
CWE ID-CWE-121
Stack-based Buffer Overflow
CVE-2025-46405
Matching Score-6
Assigner-F5, Inc.
ShareView Details
Matching Score-6
Assigner-F5, Inc.
CVSS Score-8.7||HIGH
EPSS-0.14% / 34.41%
||
7 Day CHG+0.01%
Published-13 Aug, 2025 | 14:46
Updated-21 Oct, 2025 | 18:29
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
BIG-IP APM vulnerability

When Network Access is configured on a BIG-IP APM virtual server, undisclosed traffic can cause the Traffic Management Microkernel (TMM) to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Action-Not Available
Vendor-F5, Inc.
Product-big-ip_access_policy_managerBIG-IP
CWE ID-CWE-121
Stack-based Buffer Overflow
CVE-2023-22842
Matching Score-6
Assigner-F5, Inc.
ShareView Details
Matching Score-6
Assigner-F5, Inc.
CVSS Score-7.5||HIGH
EPSS-0.56% / 68.51%
||
7 Day CHG~0.00%
Published-01 Feb, 2023 | 17:56
Updated-26 Mar, 2025 | 17:47
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
BIG-IP SIP profile vulnerability

On BIG-IP versions 16.1.x before 16.1.3.3, 15.1.x before 15.1.8.1, 14.1.x before 14.1.5.3, and all versions of 13.1.x, when a SIP profile is configured on a Message Routing type virtual server, undisclosed traffic can cause the Traffic Management Microkernel (TMM) to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Action-Not Available
Vendor-F5, Inc.
Product-big-ip_ssl_orchestratorbig-ip_application_acceleration_managerbig-ip_link_controllerbig-ip_policy_enforcement_managerbig-ip_fraud_protection_servicebig-ip_analyticsbig-ip_access_policy_managerbig-ip_domain_name_systembig-ip_local_traffic_managerbig-ip_advanced_firewall_managerbig-ip_application_security_managerbig-ip_ddos_hybrid_defenderBIG-IP
CWE ID-CWE-121
Stack-based Buffer Overflow
CWE ID-CWE-787
Out-of-bounds Write
Details not found