CVE-2026-25834
Analyzed Analyzed - Analysis Complete

Algorithm Downgrade Vulnerability in Mbed TLS v

Publication date: 2026-04-01

Last updated on: 2026-06-05

Assigner: MITRE

Description
Mbed TLS v3.3.0 up to 3.6.5 and 4.0.0 allows Algorithm Downgrade.

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Meta Information

Published
2026-04-01
Last Modified
2026-06-05
Generated
2026-07-06
AI Q&A
2026-04-01
EPSS Evaluated
2026-07-05
NVD
CVE-2026-25834
EUVD
EUVD-2026-17967

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
trustedfirmware mbed_tls From 3.3.0 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-295 The product does not validate, or incorrectly validates, a certificate.
CWE-327 The product uses a broken or risky cryptographic algorithm or protocol.

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Executive Summary

CVE-2026-25834 is a vulnerability in Mbed TLS versions 3.3.0 up to 3.6.5 and 4.0.0 that allows an Algorithm Downgrade attack.

Impact Analysis

An Algorithm Downgrade vulnerability can allow an attacker to force the use of weaker cryptographic algorithms during secure communications, potentially compromising the confidentiality and integrity of data.

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