CVE-2026-110021

Missing GSDX SignatureValue verification

Published Nov 4, 2026 CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed
Description
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 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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Phoenixcontact
Phoenixcontact plcnext Engineer
Vendors & Products Phoenixcontact
Phoenixcontact plcnext Engineer
Type Values Removed Values Added
Description 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 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.
Title Missing GSDX SignatureValue verification
First Time appeared Phoenix Contact
Phoenix Contact plcnext Engineer
Weaknesses CWE-347
CPEs cpe:2.3:a:phoenix_contact:plcnext_engineer:*:*:*:*:*:*:*:*
Vendors & Products Phoenix Contact
Phoenix Contact plcnext Engineer
References
Metrics cvssV3_1

{'score': 6.2, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
CERTVDE
Published
Updated
Nov 4, 2026, 8:09 PM
Reserved
Oct 13, 2026, 3:06 PM
Status
Deferred
Published
Nov 4, 2026, 10:17 AM
Modified
Nov 12, 2026, 8:07 PM