CVE-2026-110021

MediumCVSS 6.2

Published: 04/11/2026(UTC)Updated: 04/11/2026(UTC)Translated: 04/11/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.06%

0th percentile - higher than 0% of all known CVEs

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 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.

Risk Assessment

A local attacker could introduce a modified device description, potentially leading to import of untrusted configuration and further consequences in the engineering environment. The risk affects the integrity of configuration data and trust in imported packages.

Recommendation

Upgrade PLCnext Engineer to version 2026.6 or later, which fixes the issue. Until then, restrict GSDX package imports to trusted sources and verify their origin.

Other vulnerabilities in PLCnext Engineer

CVE-2025-41770High
The PLCnext Engineer communication interface on the device has an unauthenticated denial-of-service vulnerability. A remote attacker can interrupt access via the client application, requiring manual restart of the PLCnext service.

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS