CVE-2026-79954CWE-306

CVE-2026-79954

published September 18, 2026

CVSS
8.7
EPSS
1%
Percentile
46.1
In the wild
Unconfirmed
What it is

NASA CryptoLib 1.5.0 contains an authentication downgrade vulnerability in the Telecommand (TC) receive path. The receiver selects the Security Association used for SDLS processing solely from the SPI field inside the incoming frame, but it does not verify that the selected SA is authorized for the frame's GVCID.

The record
Technical detail
CVSS
8.7 · NONE
CVSS v4.0
8.7 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
EPSS
0.00564 · 46.1th percentile
Weakness
CWE-306 · Missing Authentication for Critical Function
Published
2026-09-18T05:16Z
References (2)
https://fluidattacks.com/advisories/linkin · [email protected]https://github.com/nasa/CryptoLib · [email protected]
EPSS history
Timeline
  • 19 SEP 03:54Z
    EPSS moved — → 0%
    epss
  • 18 SEP 00:26Z
    NASA CryptoLib 1.5.0 - TC receive path accepts Security Associations from the wrong GVCID
    cvelistv5