CVE Watch13 jul 2026

CVE-2026-14480

OpenPLC Runtime v3 contains an authenticated arbitrary file write vulnerability in the legacy web UI program‑upload workflow. The applicat

CVSS

9.9

Crítico

EPSS

0.6%

p46

KEV

—

Exploit Today

0-100

Publicado: 10 jul 2026 · Última mod.: 13 jul 2026 · CWE-73

EPSS · 30d

0.6%EPSS · 30 días0.6%

2026-07-112026-07-17

Descripción técnica

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.

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