F5 BIG-IP ASM up to 16.1.5/17.1.2 Traffic Management Microkernel operation after expiration

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in F5 BIG-IP ASM up to 16.1.5/17.1.2. Affected by this vulnerability is an unknown functionality of the component Traffic Management Microkernel. The manipulation leads to operation after expiration. This vulnerability is documented as CVE-2025-55669. The attack can be initiated remotely. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in F5 BIG-IP ASM up to 16.1.5/17.1.2. This issue affects some unknown processing of the component Traffic Management Microkernel. The manipulation with an unknown input leads to a operation after expiration vulnerability. Using CWE to declare the problem leads to CWE-672. The product uses, accesses, or otherwise operates on a resource after that resource has been expired, released, or revoked. Impacted is availability. The summary by CVE is:

When the BIG-IP Advanced WAF and ASM security policy and a server-side HTTP/2 profile are configured on a 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.

It is possible to read the advisory at my.f5.com. The identification of this vulnerability is CVE-2025-55669 since 10/04/2025. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/23/2025).

The vulnerability scanner Nessus provides a plugin with the ID 270604 (F5 Networks BIG-IP : BIG-IP HTTP/2 vulnerability (K000150752)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 16.1.6 or 17.1.2.2 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (270604) and EUVD (EUVD-2025-34649). 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: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
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: Operation after expiration
CWE: CWE-672
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: 270604
Nessus Name: F5 Networks BIG-IP : BIG-IP HTTP/2 vulnerability (K000150752)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: BIG-IP ASM 16.1.6/17.1.2.2

Timelineinfo

10/04/2025 CVE reserved
10/15/2025 +11 days Advisory disclosed
10/15/2025 +0 days VulDB entry created
10/23/2025 +7 days VulDB entry last update

Sourcesinfo

Vendor: f5.com

Advisory: K000150752
Status: Confirmed

CVE: CVE-2025-55669 (🔒)
GCVE (CVE): GCVE-0-2025-55669
GCVE (VulDB): GCVE-100-328691
EUVD: 🔒

Entryinfo

Created: 10/15/2025 16:17
Updated: 10/23/2025 00:54
Changes: 10/15/2025 16:17 (76), 10/17/2025 06:10 (2), 10/23/2025 00:54 (1)
Complete: 🔍
Cache ID: 216:D0A:103

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