CVE-2026-42919CWE-121

F5 BIG-IP Appliance Mode Vulnerability

High · published May 13, 2026

CVSS v4.0
7.1
EPSS
0%
Percentile
35.2
In the wild
Unconfirmed
What it is

A vulnerability exists in BIG-IP systems that may allow an authenticated attacker with administrative access to escalate their privileges. A successful exploit may allow the attacker to cross a security boundary.

Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

The record
Technical detail
CVSS v4.0
7.1 · HIGH
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS
0.00419 · 35.2th percentile
Weakness
CWE-121 · Stack-based Buffer Overflow
Published
2026-05-13T14:12Z
EPSS history
Timeline
  • 13 MAY 14:12Z
    F5 BIG-IP Appliance Mode Vulnerability
    cvelistv5