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  4. CVE 2026 14480 openplc v3 external control of file name or path
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Back to active CVEs
High · CVSS 8.7CVE-2026-14480

OpenPLC v3 External Control of File Name or PathCVE-2026-14480

Answer in brief

CVE-2026-14480 records a High severity (CVSS 8.7) vulnerability in OpenPLC v3 External Control of File Name or Path. The current sources do not mark it as known exploited. The current feed maps OpenPLC/OpenPLC (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Jul 10, 2026Updated Jul 13, 2026Source checked Nov 4, 2026First seen by HOL Jul 11, 2026Material review Jul 13, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.7
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Not reported

Why this deserves its current priority

CVSS is 8.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps OpenPLC/OpenPLC (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
OpenPLC/OpenPLCgenericv3Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for OpenPLC/OpenPLC.
  2. 2Review the reported fix. Source-reported solution: OpenPLC recommends users upgrade to OpenPLC v4 as OpenPLC v3 is end-of-life and is no longer receiving patches, bug fixes, or security updates.

Evidence timeline and material changes

  1. Published upstream

    Jul 10, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Jul 13, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Jul 11, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • CISA Known Exploited Vulnerabilities catalogcisa.gov
Upstream source description

OpenPLC Runtime v3 contains an authenticated arbitrary file write vulnerability in the legacy web UI program‑upload workflow. The application stores an attacker‑supplied filename (prog_file) directly into the Programs.File database field and later uses this value as the destination path for an uploaded file without validating or restricting the path. Because Python os.path.join() honors attacker‑controlled absolute paths, an authenticated user can write arbitrary files anywhere writable by the OpenPLC webserver process. In the default build pipeline, all C++ source files within the OpenPLC runtime core directory are automatically compiled into the executable runtime binary. By writing a malicious .cpp file into this directory, an authenticated attacker can escalate the arbitrary file write into arbitrary native code execution when the operator triggers a normal program compilation and runtime start.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Forged LFT metadata permits arbitrary file read and deletionAlso CWE-73

Record context

Vulnerability class
Path Traversal
EPSS
Not reported
CWE IDs
CWE-73
Source
CVE List V5
Source checked
Nov 4, 2026
References
2 linked sources
Open source record