# CVE-2026-110935: Path traversal in plug-in deployment

Status: published. Published: 2026-11-04. Updated: 2026-11-04.

The PFI plugin framework deployment routine does not validate path components when extracting archive entries to the local plugin repository. Archive entries containing relative path segments such as '..' are not rejected, allowing an unauthenticated local attacker to write files outside the plugin repository to arbitrary locations accessible with the current user's permissions which could result in full system compromise.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Phoenix Contact / PLCnext Engineer: ≥ 0.0; < 2026.6 (affected, semver). Source: CNA: CERTVDE

## Severity and prioritization

- CVSS 4.0: 8.6 (high); CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N; source: CNA: CERTVDE

- CVSS 3.1: 8.4 (high); CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H; source: CNA: CERTVDE

- CVSS 4.0: 8.6 (high); CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/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; source: NVD: info@cert.vde.com

- CVSS 3.1: 8.4 (high); CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H; source: NVD: info@cert.vde.com

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-22

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://www.certvde.com/en/advisories/VDE-2026-121/ (CNA: CERTVDE)

- https://www.certvde.com/en/advisories/VDE-2026-121/ (info@cert.vde.com)

## Provenance

- CNA: CERTVDE: https://www.cve.org/CVERecord?id=CVE-2026-110935; retrieved 2026-11-04; source updated 2026-11-04

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-110935; retrieved 2026-11-04; source updated 2026-11-04

Revision: 06fc85c351f3994eb77c1b74d80b1f456d9c70309b85f6a13bbf0ddc652d1b72

Canonical: https://y2.dev/cve/CVE-2026-110935

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