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Vulnerability Details :

CVE-2026-31851

Summary
Assigner-TuranSec
Assigner Org ID-309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c
Published At-23 Mar, 2026 | 12:21
Updated At-26 Mar, 2026 | 10:47
Rejected At-
Credits

Lack of Rate Limiting Enables Brute-Force Attacks in Nexxt Nebula 300+

Nexxt Solutions Nebula 300+ firmware through version 12.01.01.37 does not implement rate limiting or account lockout mechanisms on authentication interfaces. An attacker can perform unlimited authentication attempts against endpoints that rely on credential validation, enabling brute-force attacks to guess administrative credentials without restriction.

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:TuranSec
Assigner Org ID:309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c
Published At:23 Mar, 2026 | 12:21
Updated At:26 Mar, 2026 | 10:47
Rejected At:
▼CVE Numbering Authority (CNA)
Lack of Rate Limiting Enables Brute-Force Attacks in Nexxt Nebula 300+

Nexxt Solutions Nebula 300+ firmware through version 12.01.01.37 does not implement rate limiting or account lockout mechanisms on authentication interfaces. An attacker can perform unlimited authentication attempts against endpoints that rely on credential validation, enabling brute-force attacks to guess administrative credentials without restriction.

Affected Products
Vendor
Nexxt Solutions
Product
Nebula 300+
Default Status
unaffected
Versions
Affected
  • <= 12.01.01.37
Problem Types
TypeCWE IDDescription
CWECWE-307CWE-307 Improper Restriction of Excessive Authentication Attempts
Type: CWE
CWE ID: CWE-307
Description: CWE-307 Improper Restriction of Excessive Authentication Attempts
Metrics
VersionBase scoreBase severityVector
4.07.7HIGH
CVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Version: 4.0
Base score: 7.7
Base severity: HIGH
Vector:
CVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Metrics Other Info
Impacts
CAPEC IDDescription
N/AAn attacker can perform unlimited authentication attempts, enabling brute-force attacks against administrative credentials.
CAPEC ID: N/A
Description: An attacker can perform unlimited authentication attempts, enabling brute-force attacks against administrative credentials.
Solutions

Configurations

Workarounds

Exploits

Credits

finder
Angel Barre (call4pwn)
Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://www.nexxtsolutions.com/connectivity/internal-products/ARN02304U6/
N/A
https://nexxt-connectivity-frontend.s3.amazonaws.com/media/docs/Nebula300+_v12.01.01.37.zip
N/A
Hyperlink: https://www.nexxtsolutions.com/connectivity/internal-products/ARN02304U6/
Resource: N/A
Hyperlink: https://nexxt-connectivity-frontend.s3.amazonaws.com/media/docs/Nebula300+_v12.01.01.37.zip
Resource: N/A
▼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:309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c
Published At:23 Mar, 2026 | 13:16
Updated At:29 Apr, 2026 | 17:37

Nexxt Solutions Nebula 300+ firmware through version 12.01.01.37 does not implement rate limiting or account lockout mechanisms on authentication interfaces. An attacker can perform unlimited authentication attempts against endpoints that rely on credential validation, enabling brute-force attacks to guess administrative credentials without restriction.

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
Secondary4.07.7HIGH
CVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:N/VC:H/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
Primary3.19.8CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Type: Secondary
Version: 4.0
Base score: 7.7
Base severity: HIGH
Vector:
CVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:N/VC:H/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: 9.8
Base severity: CRITICAL
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CPE Matches

nexxtsolutions
nexxtsolutions
>>nebula300plus_firmware>>Versions up to 12.01.01.37(inclusive)
cpe:2.3:o:nexxtsolutions:nebula300plus_firmware:*:*:*:*:*:*:*:*
nexxtsolutions
nexxtsolutions
>>nebula300plus>>-
cpe:2.3:h:nexxtsolutions:nebula300plus:-:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-307Secondary309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c
CWE ID: CWE-307
Type: Secondary
Source: 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://nexxt-connectivity-frontend.s3.amazonaws.com/media/docs/Nebula300+_v12.01.01.37.zip309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c
Product
https://www.nexxtsolutions.com/connectivity/internal-products/ARN02304U6/309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c
Product
Hyperlink: https://nexxt-connectivity-frontend.s3.amazonaws.com/media/docs/Nebula300+_v12.01.01.37.zip
Source: 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c
Resource:
Product
Hyperlink: https://www.nexxtsolutions.com/connectivity/internal-products/ARN02304U6/
Source: 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c
Resource:
Product

Change History

0
Information is not available yet

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Matching Score-4
Assigner-SICK AG
CVSS Score-5.3||MEDIUM
EPSS-0.35% / 57.71%
||
7 Day CHG~0.00%
Published-12 Jun, 2025 | 14:19
Updated-26 Jan, 2026 | 19:28
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
No protection against brute-force attacks

The FTP server’s login mechanism does not restrict authentication attempts, allowing an attacker to brute-force user passwords and potentially compromising the FTP server.

Action-Not Available
Vendor-SICK AG
Product-media_serverSICK Media Server
CWE ID-CWE-307
Improper Restriction of Excessive Authentication Attempts
CVE-2019-3766
Matching Score-4
Assigner-Dell
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Matching Score-4
Assigner-Dell
CVSS Score-8.1||HIGH
EPSS-2.02% / 83.85%
||
7 Day CHG~0.00%
Published-27 Sep, 2019 | 20:22
Updated-17 Sep, 2024 | 02:01
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Dell EMC ECS versions prior to 3.4.0.0 contain an improper restriction of excessive authentication attempts vulnerability. An unauthenticated remote attacker may potentially perform a password brute-force attack to gain access to the targeted accounts.

Action-Not Available
Vendor-Dell Inc.
Product-emc_elastic_cloud_storageElastic Cloud Storage
CWE ID-CWE-307
Improper Restriction of Excessive Authentication Attempts
CVE-2023-33868
Matching Score-4
Assigner-Cybersecurity and Infrastructure Security Agency (CISA) Industrial Control Systems (ICS)
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Matching Score-4
Assigner-Cybersecurity and Infrastructure Security Agency (CISA) Industrial Control Systems (ICS)
CVSS Score-5.9||MEDIUM
EPSS-0.07% / 20.34%
||
7 Day CHG~0.00%
Published-06 Jul, 2023 | 22:53
Updated-24 Oct, 2024 | 13:31
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
PiiGAB M-Bus Improper Restriction of Excessive Authentication Attempts

The number of login attempts is not limited. This could allow an attacker to perform a brute force on HTTP basic authentication.

Action-Not Available
Vendor-piigabPiiGAB
Product-m-bus_900sm-bus_900s_firmwareM-Bus SoftwarePack
CWE ID-CWE-307
Improper Restriction of Excessive Authentication Attempts
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