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CVE-2026-79954

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

HIGH
8.7
CVSS Score
Published: September 18, 2026 at 12:26 AM UTC
Updated: September 18, 2026 at 08:17 PM UTC
1 product affected across 1 vendorCryptoLib

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Severity
HIGH8.7
Exploit prediction
EPSS 0.6%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

Third Party Advisory
Source: cverecord
https://fluidattacks.com/advisories/linkin
Product
Source: cverecord
https://github.com/nasa/CryptoLib

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.7HIGHFluid Attacks
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-306

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