F5 BIG-IP Next SPK/BIG-IP Next CNF/BIG-IP Traffic Management Microkernel out-of-bounds write

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.4$0-$5k0.00

Summaryinfo

A vulnerability was found in F5 BIG-IP Next SPK, BIG-IP Next CNF and BIG-IP and classified as critical. This vulnerability affects unknown code of the component Traffic Management Microkernel. Executing a manipulation can lead to out-of-bounds write. This vulnerability appears as CVE-2025-41431. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in F5 BIG-IP Next SPK, BIG-IP Next CNF and BIG-IP (the affected version is unknown) and classified as problematic. This vulnerability affects an unknown code of the component Traffic Management Microkernel. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. The CWE definition for the vulnerability is CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect availability. CVE summarizes:

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

The advisory is shared for download at my.f5.com. This vulnerability was named CVE-2025-41431 since 04/23/2025. The exploitation appears to be easy. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 08/06/2025).

The vulnerability scanner Nessus provides a plugin with the ID 235479 (F5 Networks BIG-IP : TMM vulnerability (K000150668)), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (235479). Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔍
CNA CVSS-BT Score: 🔍
CNA Vector: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.4

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 7.5
CNA Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 235479
Nessus Name: F5 Networks BIG-IP : TMM vulnerability (K000150668)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

04/23/2025 🔍
05/07/2025 +14 days 🔍
05/07/2025 +0 days 🔍
08/06/2025 +91 days 🔍

Sourcesinfo

Vendor: f5.com

Advisory: K000150668
Status: Confirmed

CVE: CVE-2025-41431 (🔍)
GCVE (CVE): GCVE-0-2025-41431
GCVE (VulDB): GCVE-100-307948

Entryinfo

Created: 05/07/2025 20:28
Updated: 08/06/2025 23:14
Changes: 05/07/2025 20:28 (53), 05/08/2025 18:36 (2), 08/06/2025 23:14 (25)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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