CVE-2025-27809

EUVD-2025-8055
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
mitreCNA
5.4 MEDIUM
NETWORK
HIGH
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 9.15%
Affected Products (NVD)
VendorProductVersion
armmbed_tls
𝑥
< 2.28.10
trustedfirmwarembed_tls
3.0.0 ≤
𝑥
< 3.6.3
𝑥
= Vulnerable software versions
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
mbedmbedtls
𝑥
< 2.28.10
CNA
mbedmbedtls
3.0.0 ≤
𝑥
< 3.6.3
CNA
Debian logo
Debian Releases
Debian Product
Codename
mbedtls
bookworm
no-dsa
bullseye
ignored
bullseye (security)
vulnerable
forky
3.6.7-3
fixed
sid
3.6.7-3
fixed
trixie
3.6.5-0.1~deb13u1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
mbedtls
bionic
ignored
focal
ignored
jammy
ignored
noble
ignored
oracular
ignored
plucky
ignored
questing
ignored
resolute
not-affected
xenial
ignored
Common Weakness Enumeration
References
https://github.com/Mbed-TLS/mbedtls/releases
https://mbed-tls.readthedocs.io/en/latest/security-advisories/mbedtls-security-advisory-2025-03-1/
https://github.com/Mbed-TLS/mbedtls/issues/466
https://mastodon.social/@bagder/114219540623402700