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6.5Medium

CVE-2026-25834

trustedfirmware mbed tls Published: 2026-04-01 03:00 (7 months ago)

Description

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

Weakness (CWE): CWE-295 CWE-327

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

Vendor	Product	Versions
trustedfirmware	mbed tls	3.3.0 – < 3.6.6

References and patches

https://mbed-tls.readthedocs.io/en/latest/security-advisories/ Vendor Advisory
https://mbed-tls.readthedocs.io/en/latest/security-advisories/mbedtls-security-advisory-2026-03-sigalg-injection/ Vendor Advisory

CPE matches (NVD) (2)

cpe:2.3:a:trustedfirmware:mbed_tls:*:*:*:*:*:*:*:* ≥ 3.3.0 < 3.6.6
cpe:2.3:a:trustedfirmware:mbed_tls:4.0.0:*:*:*:*:*:*:*

CVSS score

6.5Medium

Source: CISA-ADP · CVSS 3.1

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

All scores (2)

CISA-ADP	CVSS 3.1	6.5Medium
134c704f-9b21-4f2e-91b3-4a467353bcc0	CVSS 3.1	6.5Medium

EPSS (chance of exploitation in 30 days)

0.14%

higher than 3% of all CVEs

CISA assessment (SSVC)

Exploitation: none
Automatable: yes
Technical impact: partial

Timeline

ID reserved2026-02-06
Published2026-04-01 03:00
Reached IP-DB2026-10-24 23:45
Last updated2026-11-11 22:10

Assigned by (CNA): mitre
NVD status: Analyzed

View at source: CVE.org · NVD

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