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    CVE-2025-49087

    In Mbed TLS 3.6.1 through 3.6.3 before 3.6.4, a timing discrepancy in block cipher padding removal allows an attacker to recover the plaintext when PKCS#7 padding mode is used.

    Published:Jul 20, 2025
    Last Modified:Jun 5, 2026
    EPS:Jul 20, 2025
    EPSS Score:0.00428
    CVSS Score:4

    Affected Products

    Vendor
    Mbed
    Product
    Mbedtls
    Vendor
    Trustedfirmware
    Product
    Mbed Tls

    Exploits

    https://github.com/Mbed-TLS/mbedtls-docs/blob/main/security-advisories/mbedtls-security-advisory-2025-06-5.md

    Common Weakness Enumeration

    CWE-385 Covert Timing Channel

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-462 Cross-Domain Search Timing

    Related CVEs

    CVE-2026-34877 (CVSS 9.8) — An issue was discovered in Mbed TLS versions from 2.19.0 up to 3.6.5, Mbed TLS 4.0.0. Insufficient protection …
    CVE-2025-47917 (CVSS 8.9) — Mbed TLS before 3.6.4 allows a use-after-free in certain situations of applications that are developed in acco…
    CVE-2025-48965 (CVSS 4) — Mbed TLS before 3.6.4 has a NULL pointer dereference because mbedtls_asn1_store_named_data can trigger conflic…
    CVE-2025-52496 (CVSS 7.8) — Mbed TLS before 3.6.4 has a race condition in AESNI detection if certain compiler optimizations occur. An atta…
    CVE-2025-52497 (CVSS 4.8) — Mbed TLS before 3.6.4 has a PEM parsing one-byte heap-based buffer underflow, in mbedtls_pem_read_buffer and t…
    CVE-2025-49601 (CVSS 4.8) — In MbedTLS 3.3.0 before 3.6.4, mbedtls_lms_import_public_key does not check that the input buffer is at least …
    CVE-2025-49600 (CVSS 4.9) — In MbedTLS 3.3.0 before 3.6.4, mbedtls_lms_verify may accept invalid signatures if hash computation fails and …
    CVE-2024-49195 (CVSS 9.8) — Mbed TLS 3.5.x through 3.6.x before 3.6.2 has a buffer underrun in pkwrite when writing an opaque key pair…
    CVE-2024-45158 (CVSS 9.8) — An issue was discovered in Mbed TLS 3.6 before 3.6.1. A stack buffer overflow in mbedtls_ecdsa_der_to_raw() an…
    CVE-2024-28755 (CVSS 6.5) — An issue was discovered in Mbed TLS 3.5.x before 3.6.0. When an SSL context was reset with the mbedtls_ssl_ses…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High