CVE-2026-14480

CRITICALPre-NVD 9.99.9—
EchelonGraph scoreHIGH confidence

Score 9.9 from GitHub Security Advisory (severity: HIGH) published 2026-07-11. a secondary CVSS source baseline 9.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: ghsa, secondary
9.9
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: —CVSS: 9.9Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
9.9
EG Score
9.9(high)
EPSS
—
KEV
Not listed

Published

July 10, 2026

Last Modified

July 10, 2026

Advisory Details (2)

Auto-updated Jul 11, 2026
Patch available. Sources: cisa.
cisa Patch Available

OpenPLC v3 | CISA

https://www.cisa.gov/news-events/ics-advisories/icsa-26-190-01
generic

CSAF/csaf_files/OT/white/2026/icsa-26-190-01.json at develop · cisagov/CSAF · GitHub

https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-190-01.json

Vendor Advisories for CVE-2026-14480(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Data Freshness Timeline

(refreshed 0× in last 7d / 0× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-12 04:15 UTCEG score recompute
  2. 2026-07-12 04:14 UTCGHSA enrichment
  3. 2026-07-12 00:32 UTCEG score recompute
  4. 2026-07-12 00:32 UTCGHSA enrichment
  5. 2026-07-11 20:51 UTCEG score recompute
  6. 2026-07-11 20:51 UTCGHSA enrichment
  7. 2026-07-11 17:09 UTCEG score recompute
  8. 2026-07-11 17:09 UTCGHSA enrichment
  9. 2026-07-11 13:28 UTCEG score recompute
  10. 2026-07-11 13:28 UTCGHSA enrichment
  11. 2026-07-11 09:47 UTCEG score recompute
  12. 2026-07-11 09:47 UTCGHSA enrichment
  13. 2026-07-11 06:06 UTCEG score recompute
  14. 2026-07-11 06:06 UTCGHSA enrichment
  15. 2026-07-11 02:23 UTCEG score recompute
  16. 2026-07-11 02:23 UTCGHSA enrichment
  17. 2026-07-10 22:42 UTCEG score recompute
  18. 2026-07-10 22:42 UTCMITRE cvelistV5first tracked

Frequently asked(4)

What is CVE-2026-14480?
CVE-2026-14480 is a critical vulnerability published on July 10, 2026. 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…
When was CVE-2026-14480 disclosed?
CVE-2026-14480 was first published in the National Vulnerability Database on July 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-14480?
CVE-2026-14480 has a CVSS v3 base score of 9.9 (NVD).
How do I remediate CVE-2026-14480?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-14480, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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