Description
A heap use-after-free vulnerability in the TransferSubscriptions service in open62541 may allow an authenticated attacker to cause a denial of service or potentially execute arbitrary code.
References7
- github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/i…
- github.com/open62541/open62541/pull/8235/commits/b666d35769ce63…
- github.com/open62541/open62541/pull/8236/commits/06b99fef667c8e…
- github.com/open62541/open62541/pull/8237/commits/1b71d9c5d9c4d0…
- github.com/open62541/open62541/pull/8238/commits/afab4107bfd161…
- www.cisa.gov/news-events/ics-advisories/icsa-26-211-08
- www.o6-automation.com/contact
Metrics
- CVSS 3.1
-
8.1
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H - CVSS 4.0
-
7.2
HIGH
Score source: CNA
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - EPSS — exploit probability
- 1% percentile: 56 · as of 13 November 2026
- CWE
- CWE-416
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.