CVE-2026-67870: In open62541 v1.5.5, the server-side AddReferences implementation contains an incomplete validation flaw for non-local ExpandedNodeId targets. A remote attacker can send a crafted
In open62541 v1.5.5, the server-side AddReferences implementation contains an incomplete validation flaw for non-local ExpandedNodeId targets. A remote attacker can send a crafted AddReferencesRequest with an empty targetServerUri and a non-zero targetNodeId.serverIndex, causing the target node pointer to remain NULL while execution continues.
Details
Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-67870
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-678700.27% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 19% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-67870 | coverage & exploitation status | NVD · CVE.org |
Recent advisories for In open62541
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- highCVE-2026-67869: Buffer Overflow vulnerability in open62541 v1.5.5 allows a remote attacker to cause a denial o…nvd · 2026-08-06
- highCVE-2026-67863: In open62541 1.5.5, a server-side use-after-free exists in the local MonitoredItem callback pa…nvd · 2026-08-05
- highCVE-2026-67864: An issue in open62541 v.1.5.5 and before allows a remote attacker to cause a denial of service…nvd · 2026-08-05
- highCVE-2026-67862: open62541 1.5.5 contains a buffer-overflow in the high-level attribute reading logic in src/cl…nvd · 2026-08-04
- highCVE-2026-67861: An issue in open62541 v.1.5.5 and before allows a remote attacker to cause a denial of service…nvd · 2026-08-04
- highCVE-2026-67860: open62541 1.5.5 contains a heap-based buffer overflow in the default HistoryRead path when the…nvd · 2026-08-04
More from NVD Recent CVEs
- highCVE-2026-19190: A weakness has been identified in StableBit Scanner 2.6.13.4088. This affects an unknown part …2026-08-07
- unknownCVE-2026-49746: Software installed and run as a non-privileged user may conduct improper GPU system calls to c…2026-08-07
- unknownCVE-2026-45204: Software installed and run as a non-privileged user may conduct improper GPU system calls to t…2026-08-07
- unknownCVE-2026-45198: Kernel software from a non-secure operating system on a platform with Trusted Execution Enviro…2026-08-07
- highCVE-2026-19189: A security flaw has been discovered in Power Sofware PowerISO 9.3.0.0. Affected by this issue …2026-08-07