CVE-2018-19608 — Arm Mbed TLS before 2

Arm Mbed TLS before 2.14.1, before 2.7.8, and before 2.1.17 allows a local unprivileged attacker to recover the plaintext of RSA decryption, which is used in RSA-without-(EC)DH(E) cipher suites.

01What is this vulnerability?

Arm Mbed TLS before 2.14.1, before 2.7.8, and before 2.1.17 allows a local unprivileged attacker to recover the plaintext of RSA decryption, which is used in RSA-without-(EC)DH(E) cipher suites.

02Affected products

No structured affected-product list available — see references below for vendor advisories.

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2018-12-05T22:29:00.490
• Last modified: 2026-06-05T19:38:32.047

09References

• cat.eyalro.net — http://cat.eyalro.net/
• tls.mbed.org — https://tls.mbed.org/tech-updates/releases/mbedtls-2.14.1-2.7.8-and-2.1.17-relea…
• tls.mbed.org — https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-…
• cat.eyalro.net — http://cat.eyalro.net/
• tls.mbed.org — https://tls.mbed.org/tech-updates/releases/mbedtls-2.14.1-2.7.8-and-2.1.17-relea…
• tls.mbed.org — https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-…