What is CVE-2026-21897?

CVE-2026-21897 is a high-severity vulnerability in Nasa Cryptolib, classified under Out-of-bounds Write. CVSS score: 7.3/10. Published 2026-01-10.

How severe is CVE-2026-21897?

High severity. CVSS v3 base score is 7.3 out of 10.

Buffer overflow in Nasa Cryptolib

CVE-2026-21897

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…

Vulnerability class: Buffer Overflow

EPSS: 0.003 (17.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.

Affected products

Nasa Cryptolib — versions < 1.4.3

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
security-advisories@github.com (x_refsource_MISC, Release Notes)

Frequently asked questions

What is CVE-2026-21897?: CVE-2026-21897 is a high-severity vulnerability in Nasa Cryptolib, classified under Out-of-bounds Write. CVSS score: 7.3/10. Published 2026-01-10.
How severe is CVE-2026-21897?: High severity. CVSS v3 base score is 7.3 out of 10.