Kaspersky Secure Mail Gateway RCE flaw patched
CERT-FR advisory warns of a remote code execution vulnerability in Kaspersky Secure Mail Gateway versions prior to 3.1.
Sourcecert.ssi.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
- No exploitation in the wild and no public exploit is recorded for the CVEs named.
CERT-FR has published an advisory regarding a vulnerability in Kaspersky Secure Mail Gateway affecting all versions prior to 3.1. The flaw, tracked as CVE-2023-41056, allows a remote attacker to execute arbitrary code on affected systems. No details on exploitation in the wild are provided in the bulletin, and no proof-of-concept or technical exploitation specifics are disclosed.
Defenders operating Kaspersky Secure Mail Gateway should consult the vendor's security bulletin (Kaspersky advisory 12430#170926, published 17 September 2026) and apply available patches to upgrade to version 3.1 or later. As an email gateway product, this system typically sits at a network perimeter processing untrusted content, making remote code execution vulnerabilities in it a priority for timely patching even absent confirmed in-the-wild exploitation.
Mentioned in this report
Source reporting: https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-1201
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