CVE-2026-67872 json
An issue in Systerel S2OPC 1.7.3 allows a remote attacker to cause a denial of service via the event monitored-item queue resize handling
published 3mo ago modified 18d ago also EUVD-2026-53680
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 43%
- public exploits
- 0
- none known
Summary
An issue in Systerel S2OPC 1.7.3 allows a remote attacker to cause a denial of service via the event monitored-item queue resize handling
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Check with FencerCISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 3mo ago
Exploit prediction
0.51% chance of exploitation in the next 30 days, higher than 43% of all scored CVEs (FIRST EPSS, 2026-11-11).
Exploits and checks
- gitlab.com https://gitlab.com/systerel/S2OPC/-/work_items/1788 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Classification
- Weakness
-
- CWE-400 Uncontrolled Resource Consumption
References
-
gitlab.com
/systerel/S2OPC/-/work_items/1788
exploit
- github.com /systerel/S2OPC/blob/S2OPC_Toolkit_1.7.3/src/ClientServer/services/b2c/monitored_item_notification_queue_bs.c
- github.com /systerel/S2OPC/blob/S2OPC_Toolkit_1.7.3/src/ClientServer/services/bgenc/subscription_core.c
- github.com /systerel/S2OPC/blob/S2OPC_Toolkit_1.7.3/tests/ClientServer/validation_tests/server/toolkit_test_server.c
- github.com /systerel/S2OPC/blob/S2OPC_Toolkit_1.7.3/tests/ClientServer/validation_tests/client/toolkit_test_client_modify
Sources
- CVE List CVE-2026-67872
- NVD CVE-2026-67872
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