CVE-2026-25834

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Summary

CVECVE-2026-25834
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-01 18:16:28 UTC
Updated2026-04-01 20:16:23 UTC
DescriptionMbed TLS v3.3.0 up to 3.6.5 and 4.0.0 allows Algorithm Downgrade.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from ADP

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

Problem Types: CWE-295 | CWE-327 | n/a | CWE-295 CWE-295 Improper Certificate Validation | CWE-327 CWE-327 Use of a Broken or Risky Cryptographic Algorithm

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
Low

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
mbed-tls.readthedocs.io/en/latest/security-advisories [email protected] mbed-tls.readthedocs.io
mbed-tls.readthedocs.io/en/latest/security-advisories/mbedtls-security-advisory-2026-... [email protected] mbed-tls.readthedocs.io
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