# CERT-FR Warns of Kaspersky DoS Flaw

Published: 2026-11-12 · Severity: high
Canonical: https://vorant.io/reports/dc3e99cf-3f89-5ab5-9d55-47033fac7723/cert-fr-warns-of-kaspersky-dos-flaw
Vorant's rating weighs the evidence in the report: confirmed exploitation, victims claimed, CVSS and EPSS, and how many sources agree. It rates the report, not your assets.

> A remote denial-of-service vulnerability affects multiple Kaspersky products unless virus database or patches are updated.

Source: cert.cyber.gouv.fr — https://www.cert.cyber.gouv.fr/avis/CERTFR-2026-AVI-1524

## 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

- Vulnerabilities: CVE-2026-111497 (KEV)

Source reporting: https://www.cert.cyber.gouv.fr/avis/CERTFR-2026-AVI-1524

---

This is the free public brief from Vorant Threat Intelligence. When citing, attribute "Vorant" and link https://vorant.io/reports/dc3e99cf-3f89-5ab5-9d55-47033fac7723/cert-fr-warns-of-kaspersky-dos-flaw.
In the app the same report carries live profiles of the CVEs it names. The paid plans add the security research and news reporting the free tier leaves out. Slack alerts on the vendors, sectors and countries a reader follows come with the paid plans too. A new account starts with a three-day trial, no card: https://vorant.io/signup