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CVE-2025-27809

Quick assessment

Affected
Mbed mbedtls
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Mbed TLS是Mbed TLS开源的一个开源、可移植、易于使用、可读且灵活的 SSL 库。 Mbed TLS 2.28.10之前版本和3.6.3之前的3.x版本存在安全漏洞，该漏洞源于客户端接受任意主机名的可信证书。

CVSS 5.4 · Medium EPSS 0.20% · P9
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I. Basic Information for CVE-2025-27809

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
不安全的默认资源初始化
Source: CVE Program / CVE List V5
Vulnerability Title
Mbed TLS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mbed TLS是Mbed TLS开源的一个开源、可移植、易于使用、可读且灵活的 SSL 库。 Mbed TLS 2.28.10之前版本和3.6.3之前的3.x版本存在安全漏洞，该漏洞源于客户端接受任意主机名的可信证书。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Mbed mbedtls 0 ~ 2.28.10 -

II. Public POCs for CVE-2025-27809

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III. Intelligence Information for CVE-2025-27809

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Vendor Advisories for CVE-2025-27809 (1)

Vendor Pages for CVE-2025-27809 (1)

IV. Related Vulnerabilities

Same product: mbedtls
Same vendor: Mbed
Same weakness: CWE-1188

V. Comments for CVE-2025-27809

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