Trustedfirmware Mbed Tls vulnerabilities

CVE-2026-73064 Low · 2.9 CWE-394 Sep 24, 2026

In Mbed TLS 3.2.0 though 3.6.6 and 4.0.0 through 4.1.0, an attacker who can cause an…

In Mbed TLS 3.2.0 though 3.6.6 and 4.0.0 through 4.1.0, an attacker who can cause an entropy source to fail can remove or inject bytes into the start of the TLS stream. This only affects TLS 1.3 servers.

CVE-2026-25832 Low · 3.7 CWE-669 Sep 14, 2026

Incorrect Resource Transfer Between Spheres in Trustedfirmware Mbed Tls

In Mbed TLS 3.6.x before 3.6.7 and 4.1.x before 4.1.2, the TLS 1.3 client accepts HelloRetryRequest selecting an unadvertised group.

CVE-2026-34877 Critical · 9.8 CWE-250 Apr 2, 2026

Execution with Unnecessary Privileges in Arm Mbed Tls

An issue was discovered in Mbed TLS versions from 2.19.0 up to 3.6.5, Mbed TLS 4.0.0. Insufficient protection of serialized SSL context or session structures allows an attacker who can modify the serialized structures to induce memory corruption, leading to arbitrary code execution. This is caused by Incorrect Use of Privileged APIs.

CVE-2026-34876 High · 7.5 CWE-125 Apr 2, 2026

Out-of-bounds Read in Trustedfirmware Mbed Tls

An issue was discovered in Mbed TLS 3.x before 3.6.6. An out-of-bounds read vulnerability in mbedtls_ccm_finish() in library/ccm.c allows attackers to obtain adjacent CCM context data via invocation of the multipart CCM API with an oversized tag_len parameter. This is caused by missing validation of the tag_len parameter against the size of the internal 16-byte authentication buffer. The issue affects the public multipart CCM API in Mbed TLS 3.x, where mbedtls_ccm_finish() can be invoked directly by applications. In Mbed TLS 4.x versions prior to the fix, the same missing validation exists in the internal implementation; however, the function is not exposed as part of the public API. Exploitation requires application-level invocation of the multipart CCM API.

CVE-2026-34873 Critical · 9.1 CWE-287 Apr 1, 2026

Improper Authentication in Trustedfirmware Mbed Tls

An issue was discovered in Mbed TLS 3.5.0 through 4.0.0. Client impersonation can occur while resuming a TLS 1.3 session.

CVE-2026-34874 High · 7.5 CWE-476 Apr 1, 2026

NULL Pointer Dereference in Trustedfirmware Mbed Tls

An issue was discovered in Mbed TLS through 3.6.5 and 4.x through 4.0.0. There is a NULL pointer dereference in distinguished name parsing that allows an attacker to write to address 0.

CVE-2026-25835 High · 7.7 CWE-335 Apr 1, 2026

Mbed TLS before 3.6.6 and TF-PSA-Crypto before 1.1.0 misuse seeds in a Pseudo-Random…

Mbed TLS before 3.6.6 and TF-PSA-Crypto before 1.1.0 misuse seeds in a Pseudo-Random Number Generator (PRNG).

CVE-2026-25833 High · 7.5 CWE-121 Apr 1, 2026

Stack-based Buffer Overflow in Trustedfirmware Mbed Tls

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

CVE-2026-34875 Critical · 9.8 CWE-120 Apr 1, 2026

Classic Buffer Overflow in Trustedfirmware Mbed Tls

An issue was discovered in Mbed TLS through 3.6.5 and TF-PSA-Crypto 1.0.0. A buffer overflow can occur in public key export for FFDH keys.

CVE-2026-25834 Medium · 6.5 CWE-295 Apr 1, 2026

Improper Certificate Validation in Trustedfirmware Mbed Tls

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