Home/CVE/When a virtual server, network address translation (NAT) object, or secure network address translation (SNAT) object use
CVE

CVE-2025-53856

When a virtual server, network address translation (NAT) object, or secure network address translation (SNAT) object use

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.

HIGH · CVSS 7.5 EPSS 0.00036
Schedule remediation
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-705Incorrect Control Flow Scoping
▤

Affected Products & Versions

60
f5 big-ip access policy manager>= 15.1.0 and < 15.1.10.8
f5 big-ip advanced firewall manager>= 15.1.0 and < 15.1.10.8
f5 big-ip advanced web application firewall>= 15.1.0 and < 15.1.10.8
f5 big-ip analytics>= 15.1.0 and < 15.1.10.8
f5 big-ip application acceleration manager>= 15.1.0 and < 15.1.10.8
f5 big-ip application security manager>= 15.1.0 and < 15.1.10.8
f5 big-ip application visibility and reporting>= 15.1.0 and < 15.1.10.8
f5 big-ip automation toolchain>= 15.1.0 and < 15.1.10.8
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Scoring & Timeline

7.5
HIGH · CVSS v3.1 · f5sirt@f5.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD15 Oct 2025 · 02:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
yes
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
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References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://my.f5.com/manage/s/article/K000156707Vendor Advisory
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