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Description

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.

PUBLISHED Reserved 2026-04-30 | Published 2026-05-13 | Updated 2026-05-14 | Assigner f5




MEDIUM: 6.7CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:H

HIGH: 7.1CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N

Problem types

CWE-121 Stack-based Buffer Overflow

Product status

Default status
unknown

21.1.0 (custom) before *
unaffected

21.0.0 (custom) before 21.0.0.1
affected

17.5.0 (custom) before 17.5.1.4
affected

17.1.0 (custom) before 17.1.3.1
affected

16.1.0 (custom) before *
affected

Credits

F5 finder

References

my.f5.com/manage/s/article/K000158971 vendor-advisory patch

cve.org (CVE-2026-42919)

nvd.nist.gov (CVE-2026-42919)

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