Description
A heap-based out-of-bounds write vulnerability exists in S2OPC 1.7.3 in server-side EventFilter handling during CreateMonitoredItems processing. This allows a remote attacker to execute arbitrary code.
References6
- github.com/gff-cw/information/issues/16
- github.com/systerel/S2OPC/blob/b4c5c7d63cd69698461d514b905a7c92…
- github.com/systerel/S2OPC/blob/b4c5c7d63cd69698461d514b905a7c92…
- github.com/systerel/S2OPC/tree/S2OPC_Toolkit_1.7.3/samples/Clie…
- gitlab.com/systerel/S2OPC/-/work_items/1779
- github.com/gff-cw/information/issues/16
Metrics
- CVSS 3.1
-
9.8
CRITICAL
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 1% percentile: 65 · as of 11 November 2026
- CWE
- CWE-122
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.