Comodo Internet Security

Xcitium Client Security (XCS) before 13.8.2.10019 and Comodo Internet Security (CIS) through 12.3.4.8162 (fix expected by 2026 Q3) contain an integer underflow vulnerability in the firewall driver Inspect.sys that allows remote unauthenticated attackers to crash the system by sending a crafted IPv6 packet with a declared payload length smaller than the sum of its extension-header lengths. The unsigned 64-bit payload-length value underflows to a near-maximal integer, triggering an out-of-bounds read and oversized memcpy in the Windows kernel at DISPATCH_LEVEL, resulting in a blue screen of death even on hosts with all ports blocked.

Published: 2026-06-07T12:08:59.492Z
Updated: 2026-06-23T14:07:23.567Z

An issue was discovered in signmgr.dll 6.5.0.819 in Comodo Internet Security through 12.0. A DLL Preloading vulnerability allows an attacker to implant an unsigned DLL named iLog.dll in a partially unprotected product directory. This DLL is then loaded into a high-privileged service before the binary signature validation logic is loaded, and might bypass some of the self-defense mechanisms.

Published: 2019-11-18T20:00:48.000Z
Updated: 2024-08-05T01:47:14.105Z

Comodo Internet Security before 5.10.228257.2253 on Windows 7 x64 allows local users to cause a denial of service (system crash) via a crafted 32-bit Portable Executable (PE) file with a kernel ImageBase value.

Published: 2012-04-20T01:00:00.000Z
Updated: 2024-08-06T19:26:09.012Z

The Antivirus component in Comodo Internet Security before 5.3.175888.1227 does not check whether X.509 certificates in signed executable files have been revoked, which has unknown impact and remote attack vectors.

Published: 2012-08-26T01:00:00.000Z
Updated: 2024-09-17T02:47:22.893Z

The Antivirus component in Comodo Internet Security before 5.3.175888.1227 allows remote attackers to cause a denial of service (application crash) via a crafted compressed file.

Published: 2012-08-26T01:00:00.000Z
Updated: 2024-09-17T00:46:17.731Z