{"id":"CVE-2026-110021","title":"Missing GSDX SignatureValue verification","summary":"PLCnext Engineer checks GSDX manifest reference digests but does not cryptographically verify the XML `SignatureValue` over canonicalized `SignedInfo`. An unauthenticated local attacker can modify signed GSDML content, update its manifes…","severity":"medium","cvss":6.2,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","cvssSource":"cna","cwe":["CWE-347"],"vendor":"Phoenix Contact","product":"PLCnext Engineer","affected":["plcnext_engineer >= 0.0 < 2026.6"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-04T20:09:18.085257Z"},"published":"2026-11-04","updated":"2026-11-04","sourceUpdated":"2026-11-04T20:09:40.784Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-110021","references":[{"url":"https://www.certvde.com/en/advisories/VDE-2026-121/"}],"tags":["cve.org"],"epss":0.00062,"epssPercentile":0.00008,"ingestedAt":"2026-11-05T21:36:00.531Z","slug":"CVE-2026-110021","body":"## Overview\n\nPLCnext Engineer checks GSDX manifest reference digests but does not cryptographically verify the XML `SignatureValue` over canonicalized `SignedInfo`. An unauthenticated local attacker can modify signed GSDML content, update its manifest digest, retain the public certificate data, and leave an invalid nonempty `SignatureValue`. PLCnext Engineer prior to 2026.6 reports the package as `Valid` and selects the modified device description for import under the default policy.\n\n## Affected\n\n- `plcnext_engineer >= 0.0 < 2026.6`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":34,"depthScoreParts":{"impact":34.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}