CVE-2026-79954

Published Sep 18, 2026 CWE-306

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.

Is your site exposed to CVE-2026-79954?

Run a free security scan — no signup, results in seconds.

Weakness Type (CWE)

CWE-306 Missing Authentication

References

Frequently Asked Questions

What is 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.
How do I check if I'm vulnerable to CVE-2026-79954? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

Don't wait for an exploit

Scan your website for vulnerabilities like CVE-2026-79954 — free, no signup required.