F5 BIG-IP up to 15.1.10/16.1.6/17.1.2/17.5.1 PVA Feature incorrect control flow scoping

CVSS Meta Temp Score
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CTI Interest Score
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7.3$0-$5k0.64

Summaryinfo

A vulnerability labeled as critical has been found in F5 BIG-IP up to 15.1.10/16.1.6/17.1.2/17.5.1. This affects an unknown function of the component PVA Feature. Such manipulation leads to incorrect control flow scoping. This vulnerability is listed as CVE-2025-53856. The attack may be performed from remote. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in F5 BIG-IP up to 15.1.10/16.1.6/17.1.2/17.5.1. It has been rated as critical. Affected by this issue is an unknown part of the component PVA Feature. The manipulation with an unknown input leads to a incorrect control flow scoping vulnerability. Using CWE to declare the problem leads to CWE-705. The product does not properly return control flow to the proper location after it has completed a task or detected an unusual condition. Impacted is availability. CVE summarizes:

When a virtual server, network address translation (NAT) object, or secure network address translation (SNAT) object uses the embedded Packet Velocity Acceleration (ePVA) feature, undisclosed traffic can cause the Traffic Management Microkernel (TMM) to terminate.  To determine which BIG-IP platforms have an ePVA chip refer to K12837: Overview of the ePVA feature https://my.f5.com/manage/s/article/K12837 .  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 is handled as CVE-2025-53856 since 10/04/2025. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 270622 (F5 Networks BIG-IP : BIG-IP TMM vulnerability (K000156707)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 15.1.10.8, 16.1.6.1, 17.1.3 or 17.5.1.3 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (270622) and CERT Bund (WID-SEC-2025-2310). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

  • F5 F5OS
  • F5 BIG-IP

Productinfo

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Name

Version

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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: 7.5
VulDB Meta Temp Score: 7.3

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
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: Incorrect control flow scoping
CWE: CWE-705
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: 270622
Nessus Name: F5 Networks BIG-IP : BIG-IP TMM vulnerability (K000156707)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: BIG-IP 15.1.10.8/16.1.6.1/17.1.3/17.5.1.3

Timelineinfo

10/04/2025 CVE reserved
10/15/2025 +11 days Advisory disclosed
10/15/2025 +0 days VulDB entry created
03/30/2026 +166 days VulDB entry last update

Sourcesinfo

Vendor: f5.com

Advisory: K000156707
Status: Confirmed

CVE: CVE-2025-53856 (🔒)
GCVE (CVE): GCVE-0-2025-53856
GCVE (VulDB): GCVE-100-328688
CERT Bund: WID-SEC-2025-2310 - F5 BIG-IP und F5OS: Mehrere Schwachstellen

Entryinfo

Created: 10/15/2025 16:15
Updated: 03/30/2026 11:30
Changes: 10/15/2025 16:15 (76), 10/16/2025 05:41 (2), 03/30/2026 11:30 (7)
Complete: 🔍
Cache ID: 216:8A0:103

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