Auth bypass in Nasa Cryptolib
CVE-2026-79954
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.
Vulnerability class: Broken Authentication
Affected products
- Nasa Cryptolib — versions 1.5.0
Weakness classification (CWE)
References
- help@fluidattacks.com (third-party-advisory)
- help@fluidattacks.com (product)