CVE-2026-113618
The ZSIRep client library (ZSIREP.CLIENT.DLL) is vulnerable to improper server certificate validation. It registers a process-wide .NET callback that accepts any certificate for HTTPS connections without verification. This allows a man-in-the-middle attacker to impersonate the ZSIRep server and intercept or modify authentication data and documents. The callback persists after the client is closed, weakening other HTTPS connections in the same application. The issue was fixed in version 2.12.3.1. The library is used in KS-SOMED (fixed in 2026.03.0.01), KS-PPS (fixed in 2026.03.1.0), KS-MEDIS (fixed in 2026.03.0.0), KS-SOLAB (fixed in 2026.3.1.0), and KS-ASW (fixed in 2026.3.0.1).
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Show me how to fix itTimeline
- First covered by RedTeamDaily
- Published by NVD
- Last updated by NVD
Coverage
Certificate validation flaw found in KAMSOFT ZSIRep CLIENT library
CERT Polska has reported an improper certificate validation vulnerability, tracked as CVE-2026-113618, in the KAMSOFT ZSIRep CLIENT library. The article does not give affected versions, a fix or a severity rating.
Sources: NVD and CISA known exploited vulnerabilities catalogue.