CVE-2021-23002

Severity: medium (CVSS 4.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-03-31 · updated 2026-06-17

Description

When using BIG-IP APM 16.0.x before 16.0.1.1, 15.1.x before 15.1.2.1, 14.1.x before 14.1.4, 13.1.x before 13.1.3.6, or all 12.1.x and 11.6.x versions or Edge Client versions 7.2.1.x before 7.2.1.1, 7.1.9.x before 7.1.9.8, or 7.1.8.x before 7.1.8.5, the session ID is visible in the arguments of the f5vpn.exe command when VPN is launched from the browser on a Windows system. Addressing this issue requires both the client and server fixes. Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.

Affected products

F5 Access Policy Manager Clients: from 7.1.5 before 7.1.8.5; from 7.1.9 before 7.1.9.8; from 7.2.1 before 7.2.1.1 — fixed in 7.1.8.5, 7.1.9.8, 7.2.1.1
F5 BIG-IP APM: from 11.6.1 through 11.6.5; from 12.1.0 through 12.1.5; from 13.1.0 before 13.1.3.6; from 14.1.0 before 14.1.4; from 15.1.0 before 15.1.2.1; from 16.0.0 before 16.0.1.1 — fixed in 13.1.3.6, 14.1.4, 15.1.2.1, 16.0.1.1

How to fix

Upgrade to a fixed version: F5 Access Policy Manager Clients 7.1.8.5, 7.1.9.8, 7.2.1.1; F5 BIG-IP APM 13.1.3.6, 14.1.4, 15.1.2.1, 16.0.1.1. Check the vendor advisory for mitigations.

References

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