CVE-2026-15688

CRITICALPre-NVD 9.29.2—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.2 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.1%, top 98% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 4 sources updated this week
9.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.2Exploit: None knownExposed: 0

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

Incorrect Implementation of Authentication Algorithm Vulnerability in Mitsubishi Electric GX Works3 and Motion Control Setting allows a local attacker to successfully authenticate even with an invalid block password by executing the affected product and modifying part of the executable module in memory, and thereby may be able to view, tamper with, destroy, or delete control programs.

CVSS v3
9.2
EG Score
9.2(medium)
EG Risk
41(Track)
EG Risk 41/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity92% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
2%
KEV
Not listed

Published

September 17, 2026

Last Modified

September 18, 2026

Advisory Details (1)

Auto-updated Sep 17, 2026
No patch confirmed yet.
generic
https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2026-007_en.pdf

Vendor Advisories for CVE-2026-15688(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 20× in last 7d / 20× 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. 2026-09-19 03:29 UTCGHSA enrichment
  2. 2026-09-18 23:31 UTCGHSA enrichment
  3. 2026-09-18 19:33 UTCEG score recompute
  4. 2026-09-18 19:33 UTCGHSA enrichment
  5. 2026-09-18 19:27 UTCEPSS rescore
  6. 2026-09-18 18:13 UTCGHSA enrichment
  7. 2026-09-18 14:15 UTCGHSA enrichment
  8. 2026-09-18 10:08 UTCGHSA enrichment
  9. 2026-09-18 06:11 UTCGHSA enrichment
  10. 2026-09-18 02:13 UTCGHSA enrichment
  11. 2026-09-17 22:16 UTCEG score recompute
  12. 2026-09-17 22:16 UTCGHSA enrichment
  13. 2026-09-17 18:18 UTCGHSA enrichment
  14. 2026-09-17 13:21 UTCEG score recompute
  15. 2026-09-17 13:21 UTCGHSA enrichment
  16. 2026-09-17 12:52 UTCEG score recompute
  17. 2026-09-17 12:52 UTCGHSA enrichment
  18. 2026-09-17 09:32 UTCEG score recompute
  19. 2026-09-17 08:35 UTCEG score recompute
  20. 2026-09-17 08:34 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-15688?
CVE-2026-15688 is a critical vulnerability published on September 17, 2026. Incorrect Implementation of Authentication Algorithm Vulnerability in Mitsubishi Electric GX Works3 and Motion Control Setting allows a local attacker to successfully authenticate even with an invalid block password by executing the affected product and modifying part of the executable module in…
When was CVE-2026-15688 disclosed?
CVE-2026-15688 was first published in the National Vulnerability Database on September 17, 2026, with the most recent update on September 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-15688 actively exploited?
CVE-2026-15688 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 98.0% of all scored CVEs.
What is the CVSS score of CVE-2026-15688?
CVE-2026-15688 has a CVSS v3 base score of 9.2 (NVD).
How do I remediate CVE-2026-15688?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-15688, 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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