S2OPC 1.7.3 contains an out-of-bounds read in RepublishResponse handling.
Priority HIGH 72CWE-125Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-125 and the CVSS impact.
Summary
S2OPC 1.7.3 contains an out-of-bounds read in RepublishResponse handling. This allows a remote attacker to cause a denial of service
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00759 55th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-67865
- 2026-10-03 Alias added: GHSA-pq6j-99w5-mgfp
References
Other 5
- https://gitlab.com/systerel/S2OPC/-/work_items/1785
- https://github.com/systerel/S2OPC/blob/S2OPC_Toolkit_1.7.3/src/ClientServer/services/b2c/msg_subscription_publish_bs.c
- https://github.com/systerel/S2OPC/blob/S2OPC_Toolkit_1.7.3/src/ClientServer/services/b2c/msg_subscription_publish_ack_bs.c
- https://github.com/systerel/S2OPC/blob/S2OPC_Toolkit_1.7.3/src/Common/opcua_types/sopc_encoder.c
- https://github.com/systerel/S2OPC/blob/S2OPC_Toolkit_1.7.3/tests/ClientServer/CMakeLists.txt
Sources
- CVE-2026-67865 · CVE Program
- CVE-2026-67865 · NVD
- FIRST EPSS
- GHSA-pq6j-99w5-mgfp · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences