{"id":"CVE-2026-79954","title":"NASA CryptoLib 1.5.0 contains an authentication downgrade vulnerability in the Telecommand (TC) receive path","summary":"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…","severity":"high","cvss":8.7,"cvssVector":"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","cwe":["CWE-306"],"vendor":"NASA","product":"CryptoLib","affected":["CryptoLib 1.5.0"],"published":"2026-09-18","updated":"2026-09-18","sourceUpdated":"2026-09-18T20:17:23.097","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-79954","references":[{"url":"https://fluidattacks.com/advisories/linkin","label":"help@fluidattacks.com"},{"url":"https://github.com/nasa/CryptoLib","label":"help@fluidattacks.com"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-09-18T19:58:38.011606Z"},"cvssSource":"cna","epss":0.00564,"epssPercentile":0.44488,"ingestedAt":"2026-09-18T01:33:24.267Z","slug":"CVE-2026-79954","body":"## Overview\n\nNASA 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":47.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}