CVE-2026-25834
mediumMbed TLS v3.3.0 up to 3.6.5 and 4.0.0 allows Algorithm Downgrade.
Vendor / product: Trustedfirmware — mbed tls
Mbed TLS v3.3.0 up to 3.6.5 and 4.0.0 allows Algorithm Downgrade.
CVSS
6.5
6.5 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L Severity source: NVD CVSS v3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
Timeline (UTC)
Published: 2026-04-01 18:16
Modified: 2026-11-11 19:10
NVD status: Analyzed
Last synced 7 hours ago
Verified against the source API 2026-11-11 19:10 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
trustedfirmware / mbed_tls ≥3.3.0 <3.6.6, 4.0.0
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Vendor advisory: https://mbed-tls.readthedocs.io/en/latest/security-advisories/
References
Data sources
NVD CVE API 2.0 — fetched 2026-11-11 19:10 UTC · record ↗