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CVE-2026-25833

HIGH CVSS 3.1: 7.5 EPSS 0.04%
Updated Apr 01, 2026
Mbed
Parameter Value
CVSS 7.5 (HIGH)
Fixed In 3.6.6
Type CWE-121 (Stack-based Buffer Overflow)
Vendor Mbed
Public PoC No

Mbed TLS 3.5.0 to 3.6.5 fixed in 3.6.6 and 4.1.0 has a buffer overflow in the x509_inet_pton_ipv6() function

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
High
Complete denial of service

CVSS Vector v3.1

Weakness Type (CWE)

CWE-121 Stack-based Buffer Overflow

Vulnerable Products

n/a:n/a

References 2

https://mbed-tls.readthedocs.io/en/latest/security-advisories/
NVD
https://mbed-tls.readthedocs.io/en/latest/security-advisories/mbedtls-security-…
NVD
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