CVE-2026-76423

CRITICALPre-NVD 10.010.0—
EchelonGraph scoreHIGH confidence

Score 10.0 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-16. a secondary CVSS source baseline 10.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
10.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 10.0Exploit: None knownExposed: 0

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

A vulnerability in the REST API of Cisco ISE and Cisco ISE-PIC could allow an unauthenticated, remote attacker to gain administrative access to an affected device. This vulnerability is due to the REST API web service being exposed with insufficient authorization checks. An attacker could exploit this vulnerability by sending a crafted HTTP request to the exposed REST API port. A successful exploit could allow the attacker to read and modify ISE configuration and identity data with administrative privileges.

CVSS v3
10.0
EG Score
10.0(high)
EG Risk
60(Track)
EG Risk 60/100SSVC: 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
Severity100% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
45%
KEV
Not listed

Published

September 16, 2026

Last Modified

September 17, 2026

Advisory Details (1)

Auto-updated Sep 17, 2026
No patch confirmed yet.
generic

Cisco Identity Services Engine Vulnerabilities

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-multi-hrP9jQSQ

Vendor Advisories for CVE-2026-76423(2)

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 29× in last 7d / 29× 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 11:08 UTCGHSA enrichment
  2. 2026-09-19 07:15 UTCGHSA enrichment
  3. 2026-09-19 03:22 UTCGHSA enrichment
  4. 2026-09-18 23:28 UTCGHSA enrichment
  5. 2026-09-18 19:35 UTCEG score recompute
  6. 2026-09-18 19:35 UTCGHSA enrichment
  7. 2026-09-18 19:28 UTCEPSS rescore
  8. 2026-09-18 15:41 UTCGHSA enrichment
  9. 2026-09-18 11:45 UTCGHSA enrichment
  10. 2026-09-18 07:52 UTCGHSA enrichment
  11. 2026-09-18 03:58 UTCGHSA enrichment
  12. 2026-09-18 00:05 UTCGHSA enrichment
  13. 2026-09-17 20:12 UTCEG score recompute
  14. 2026-09-17 20:12 UTCGHSA enrichment
  15. 2026-09-17 16:14 UTCGHSA enrichment
  16. 2026-09-17 12:20 UTCEG score recompute
  17. 2026-09-17 12:20 UTCGHSA enrichment
  18. 2026-09-17 11:49 UTCEG score recompute
  19. 2026-09-17 11:49 UTCGHSA enrichment
  20. 2026-09-17 08:12 UTCGHSA enrichment
  21. 2026-09-17 04:19 UTCEG score recompute
  22. 2026-09-17 04:19 UTCGHSA enrichment
  23. 2026-09-17 04:05 UTCEG score recompute
  24. 2026-09-17 04:05 UTCGHSA enrichment
  25. 2026-09-17 00:52 UTCEG score recompute
Show 4 more
  1. 2026-09-17 00:52 UTCGHSA enrichment
  2. 2026-09-16 20:31 UTCEG score recompute
  3. 2026-09-16 20:09 UTCEG score recompute
  4. 2026-09-16 20:09 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-76423?
CVE-2026-76423 is a critical vulnerability published on September 16, 2026. A vulnerability in the REST API of Cisco ISE and Cisco ISE-PIC could allow an unauthenticated, remote attacker to gain administrative access to an affected device. This vulnerability is due to the REST API web service being exposed with insufficient authorization checks. An attacker could exploit…
When was CVE-2026-76423 disclosed?
CVE-2026-76423 was first published in the National Vulnerability Database on September 16, 2026, with the most recent update on September 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-76423 actively exploited?
CVE-2026-76423 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 55.3% of all scored CVEs.
What is the CVSS score of CVE-2026-76423?
CVE-2026-76423 has a CVSS v3 base score of 10.0 (NVD).
How do I remediate CVE-2026-76423?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-76423, 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

Explore the affected products and dependency analysis for CVE-2026-76423

Explore →

Is Your Infrastructure Affected by CVE-2026-76423?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs