What is CVE-2026-25832?

CVE-2026-25832 is a low-severity vulnerability in Trustedfirmware Mbed TLS, classified under Incorrect Resource Transfer Between Spheres. CVSS score: 3.7/10. Published 2026-09-14.

How severe is CVE-2026-25832?

Low severity. CVSS v3 base score is 3.7 out of 10.

Vulnerability in Trustedfirmware Mbed TLS

CVE-2026-25832

In Mbed TLS 3.6.x before 3.6.7 and 4.1.x before 4.1.2, the TLS 1.3 client accepts HelloRetryRequest selecting an unadvertised group.

EPSS: 0.002 (12.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N.

Affected products

Trustedfirmware Mbed Tls

Weakness classification (CWE)

CWE-669 — Incorrect Resource Transfer Between Spheres

References

cve@mitre.org
cve@mitre.org

Frequently asked questions

What is CVE-2026-25832?: CVE-2026-25832 is a low-severity vulnerability in Trustedfirmware Mbed TLS, classified under Incorrect Resource Transfer Between Spheres. CVSS score: 3.7/10. Published 2026-09-14.
How severe is CVE-2026-25832?: Low severity. CVSS v3 base score is 3.7 out of 10.