Is CVE-2025-27809 actively exploited?

CVE-2025-27809 has no public evidence of in-the-wild exploitation as of 2025-07-17.

What is the CVSS score for CVE-2025-27809?

CVE-2025-27809 has a CVSS score of 5.4 (MEDIUM severity). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N.

How do I patch CVE-2025-27809?

Patch guidance is available from arm security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2025-27809.

Which products are affected by CVE-2025-27809?

2 products: arm mbed tls, arm mbed tls.

CVE-2025-27809 - remediation guidance & executive summary

Description

Mbed TLS before 2.28.10 and 3.x before 3.6.3, on the client side, accepts servers that have trusted certificates for arbitrary hostnames unless the TLS client application calls mbedtls_ssl_set_hostname.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
Attack Vector: network
Complexity: high
Privileges: none
User Action: none
Scope: changed
Confidentiality: low
Integrity: low
Availability: none
Weaknesses: CWE-1188

Metadata

Primary Vendor: ARM
Published: 3/25/2025
Last Modified: 7/17/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2025-27809

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary