CVE-2023-40151

CRITICALNVD 10.010.0—
EchelonGraph scoreMEDIUM confidence

Score 10.0 from GitHub Security Advisory (severity: CRITICAL) published 2023-11-21. NVD baseline CVSS 10.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
10.0
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 10.0Exploit: NoneExposed: 0

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

When user authentication is not enabled the shell can execute commands with the highest privileges. Red Lion SixTRAK and VersaTRAK Series RTUs with authenticated users enabled (UDR-A) any Sixnet UDR message will meet an authentication challenge over UDP/IP. When the same message comes over TCP/IP the RTU will simply accept the message with no authentication challenge.

CVSS v3
10.0
EG Score
10.0(medium)
EPSS
63.2%
KEV
Not listed

Published

November 21, 2023

Last Modified

November 21, 2024

Advisory Details (1)

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

Red Lion Sixnet RTUs | CISA

https://www.cisa.gov/news-events/ics-advisories/icsa-23-320-01

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 10× in last 7d / 45× 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. 2026-07-15 16:56 UTCEPSS rescore
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  3. 2026-07-15 01:58 UTCEPSS rescore
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  1. 2026-06-27 03:07 UTCEPSS rescore
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  65. 2026-05-24 13:32 UTCEG score recompute
  66. 2026-05-24 13:32 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2023-40151?
CVE-2023-40151 is a critical vulnerability published on November 21, 2023. When user authentication is not enabled the shell can execute commands with the highest privileges. Red Lion SixTRAK and VersaTRAK Series RTUs with authenticated users enabled (UDR-A) any Sixnet UDR message will meet an authentication challenge over UDP/IP. When the same message comes over TCP/IP…
When was CVE-2023-40151 disclosed?
CVE-2023-40151 was first published in the National Vulnerability Database on November 21, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-40151 actively exploited?
CVE-2023-40151 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 63.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2023-40151?
CVE-2023-40151 has a CVSS v3 base score of 10.0 (NVD).
How do I remediate CVE-2023-40151?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-40151, 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.

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