CERT-FR Advisory: Multiple OpenSSL Vulnerabilities
CERT-FR warns of multiple OpenSSL flaws enabling remote DoS, data confidentiality loss, and security bypass; patches available.
Sourcecert.cyber.gouv.fr — open the original
What to check
- Applies to
- The 5 CVEs named below. Whether you run an affected version is not assessed: check the versions the source lists.
- Exploitation
- No exploitation in the wild and no public exploit is recorded for the CVEs named.
CERT-FR has published an advisory detailing multiple vulnerabilities affecting OpenSSL across several version branches, including 1.0.2x prior to 1.0.2zt, 1.1.1x prior to 1.1.1zk, 3.0.x prior to 3.0.24, 3.5.x prior to 3.5.10, 4.0.x prior to 4.0.4, and 4.1.x prior to 4.1.1. These vulnerabilities, identified by five CVE references, could allow an attacker to cause a remote denial of service, compromise data confidentiality, or bypass security policy protections.
The advisory does not indicate active exploitation in the wild; it is a standard vendor-driven patch notification referencing OpenSSL's own security bulletin dated 10 November 2026. Defenders running affected OpenSSL versions across any dependent applications, libraries, or embedded systems should prioritize upgrading to the fixed versions referenced in the official OpenSSL security advisory. Given OpenSSL's widespread use in TLS/SSL implementations across countless products, organizations should inventory affected systems and apply patches according to standard vulnerability management processes.
Mentioned in this report
Source reporting: https://www.cert.cyber.gouv.fr/avis/CERTFR-2026-AVI-1496
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