CVE-2026-79954 PUBLISHED

NASA CryptoLib 1.5.0 - TC receive path accepts Security Associations from the wrong GVCID

Assigner: Fluid Attacks
Reserved: 25.08.2026 Published: 18.09.2026 Updated: 18.09.2026

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.

Metrics

CVSS 4.0

CVSS Vector: 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
CVSS Score: 8.7

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	NASA
Product	CryptoLib
Versions	Default: unaffected Version 1.5.0 is affected

Credits

Romel Marín finder

References

Problem Types

CWE-306 Missing Authentication for Critical Function CWE

Impacts

CAPEC-114 Authentication Abuse