CERT-FR Warns of Kaspersky DoS Flaw
A remote denial-of-service vulnerability affects multiple Kaspersky products unless virus database or patches are updated.
Sourcecert.cyber.gouv.fr — open the original
What to check
- Applies to
- The 1 CVE named below. Whether you run an affected version is not assessed: check the versions the source lists.
- Exploitation
- CISA lists CVE-2026-111497 as exploited in the wild.
CERT-FR issued an advisory describing a remote denial-of-service vulnerability (CVE-2026-111497) affecting a wide range of Kaspersky products, including Embedded Systems Security, Endpoint Security for Windows (multiple version branches), Industrial CyberSecurity for Nodes, Kaspersky for Windows, Security Center for Linux and Windows, and Small Office Security. The flaw allows a remote attacker to cause a denial-of-service condition on affected systems.
Most affected products are vulnerable only if running a virus database older than November 7, 2026, meaning updating the antivirus signature database remediates the issue for those products. However, Kaspersky Security Center for Linux (versions prior to 17 Patch 1) and for Windows (versions prior to 15.1 Update 3 Patch 1) require an actual software patch rather than a signature update. No evidence of active exploitation is mentioned in the advisory. Defenders should ensure both virus database currency and apply the relevant vendor patches referenced in Kaspersky's security bulletin 12430#111126 (published November 11, 2026).
Mentioned in this report
Source reporting: https://www.cert.cyber.gouv.fr/avis/CERTFR-2026-AVI-1524
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