F5 BIG-IP Next SPK/BIG-IP Next CNF/BIG-IP Traffic Management Microkernel buffer overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in F5 BIG-IP Next SPK, BIG-IP Next CNF and BIG-IP. Affected by this issue is some unknown functionality of the component Traffic Management Microkernel. This manipulation causes buffer overflow. This vulnerability is tracked as CVE-2025-36557. The attack is possible to be carried out remotely. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in F5 BIG-IP Next SPK, BIG-IP Next CNF and BIG-IP (version now known) and classified as critical. Affected by this vulnerability is some unknown processing of the component Traffic Management Microkernel. The manipulation with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

When an HTTP profile with the Enforce RFC Compliance option is configured on a 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.

The advisory is shared at my.f5.com. This vulnerability is known as CVE-2025-36557 since 04/23/2025. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/06/2025).

The vulnerability scanner Nessus provides a plugin with the ID 235474 (F5 Networks BIG-IP : BIG-IP HTTP vulnerability (K000139571)), 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 (235474). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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: 7.4
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
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: Buffer overflow
CWE: CWE-120 / 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: 235474
Nessus Name: F5 Networks BIG-IP : BIG-IP HTTP vulnerability (K000139571)

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: K000139571
Status: Confirmed

CVE: CVE-2025-36557 (🔍)
GCVE (CVE): GCVE-0-2025-36557
GCVE (VulDB): GCVE-100-307957

Entryinfo

Created: 05/07/2025 20:35
Updated: 08/06/2025 23:14
Changes: 05/07/2025 20:35 (53), 05/08/2025 12:00 (24), 05/08/2025 18:36 (2), 08/06/2025 23:14 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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