Exploitation ongoing with high activity in latest observed window (1 mentions)
Recommended action window: Immediate (within 24h)
NVD 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.
Priority
MEDIUM
Exploitation
ACTIVE
PoC
NONE
Patch
AVAILABLE
Momentum
STABLE
| Date | Total | Labels |
|---|
| 2026-07-09 | 1 | Active Exploitation1 |
| 2026-07-12 | 1 | Disclosure1 |
| 2026-08-14 | 1 | Disclosure1 |
Did you know CISA recently flagged a critical flaw in OpenPLC Runtime (CVE-2026-14480) with a CVSS score of 9.9? This could significantly impact industrial control environments, making ongoing vigilance essential. Stay updated on your systems.
Post summary
CISA has flagged a critical flaw in OpenPLC Runtime (CVE‑2026‑14480) with a CVSS score of 9.9, urging vigilance but providing no evidence of exploitation or remediation.
TRC analysis shows attackers exploiting CVE-2026-14480 in OpenPLC v3 systems to write malicious files and escalate privileges. Following compromise, they moved laterally within industrial networks to disrupt control processes. Runtime segmentation helps contain such post-compromise activity across OT environments. #ZeroDay #CloudSecurity :link: Full breakdown: https://aviatrix.ai/threat-research-center/openplc-v3-cve-2026-14480
Post summary
The tweet reports that CVE-2026-14480 is being actively exploited in OpenPLC v3 systems, enabling attackers to write malicious files, privilege‑escalate, and move laterally to disrupt industrial control processes.
#CRITICAL CVE-2026-14480: OpenPLC Runtime v3 authenticated arbitrary file write (CVSS 9.9) allows code execution via malicious .cpp upload. Authenticated attackers can write files anywhere writable by webserver. Patch immediately. #CVE #Vulnerability #PatchNow https://t.co/VByWTxlkgB
Post summary
A critical vulnerability (CVSS 9.9) in OpenPLC Runtime v3 allows authenticated attackers to execute code via malicious .cpp uploads; an urgent patch is required.