CVE-2026-21898: Nasa Cryptolib

High severity, CVSS 8.2. EPSS: 0.5% chance of exploitation in the next 30 days.

CryptoLib provides a software-only solution using the CCSDS Space Data Link Security Protocol - Extended Procedures (SDLS-EP) to secure communications between a spacecraft running the core Flight System (cFS) and a ground station. Prior to version 1.4.3, the Crypto_AOS_ProcessSecurity function reads memory without valid bounds checking when parsing AOS frame hashes. This issue has been patched in version 1.4.3.

Affected products

• Nasa Cryptolib: before 1.4.3 (fixed in 1.4.3)

Published 2026-01-10. Last modified 2026-06-17.