CVE-2026-15640

CRITICALPre-NVD 9.59.5—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 80% 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
9.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.5Exploit: None knownExposed: 0

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

Under certain conditions a valid SAML IdP response may be used to impersonate another Secret Server user.

CVSS v3
9.5
EG Score
9.5(medium)
EG Risk
43(Track)
EG Risk 43/100SSVC: 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
Severity95% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
20%
KEV
Not listed

Published

September 15, 2026

Last Modified

September 18, 2026

Advisory Details (1)

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

Delinea Security Advisories

https://delinea.com/security-advisories

Vendor Advisories for CVE-2026-15640(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 37× in last 7d / 37× 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 20:07 UTCGHSA enrichment
  2. 2026-09-19 16:03 UTCEG score recompute
  3. 2026-09-19 16:03 UTCGHSA enrichment
  4. 2026-09-19 12:00 UTCGHSA enrichment
  5. 2026-09-19 07:57 UTCGHSA enrichment
  6. 2026-09-19 03:54 UTCGHSA enrichment
  7. 2026-09-18 23:51 UTCGHSA enrichment
  8. 2026-09-18 19:48 UTCEG score recompute
  9. 2026-09-18 19:48 UTCGHSA enrichment
  10. 2026-09-18 19:27 UTCEPSS rescore
  11. 2026-09-18 18:46 UTCGHSA enrichment
  12. 2026-09-18 14:43 UTCGHSA enrichment
  13. 2026-09-18 10:38 UTCGHSA enrichment
  14. 2026-09-18 06:34 UTCGHSA enrichment
  15. 2026-09-18 02:31 UTCGHSA enrichment
  16. 2026-09-17 22:27 UTCEG score recompute
  17. 2026-09-17 22:27 UTCGHSA enrichment
  18. 2026-09-17 18:22 UTCGHSA enrichment
  19. 2026-09-17 13:15 UTCGHSA enrichment
  20. 2026-09-17 09:12 UTCGHSA enrichment
  21. 2026-09-17 05:09 UTCGHSA enrichment
  22. 2026-09-17 01:06 UTCGHSA enrichment
  23. 2026-09-16 21:02 UTCEG score recompute
  24. 2026-09-16 21:02 UTCGHSA enrichment
  25. 2026-09-16 19:44 UTCEG score recompute
Show 12 more
  1. 2026-09-16 19:44 UTCGHSA enrichment
  2. 2026-09-16 17:53 UTCEG score recompute
  3. 2026-09-16 17:53 UTCGHSA enrichment
  4. 2026-09-16 14:07 UTCEPSS rescore
  5. 2026-09-16 13:48 UTCGHSA enrichment
  6. 2026-09-16 09:27 UTCGHSA enrichment
  7. 2026-09-16 05:23 UTCGHSA enrichment
  8. 2026-09-16 01:20 UTCEG score recompute
  9. 2026-09-16 01:20 UTCGHSA enrichment
  10. 2026-09-16 00:25 UTCEG score recompute
  11. 2026-09-15 23:33 UTCEG score recompute
  12. 2026-09-15 23:32 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-15640?
CVE-2026-15640 is a critical vulnerability published on September 15, 2026. Under certain conditions a valid SAML IdP response may be used to impersonate another Secret Server user.
When was CVE-2026-15640 disclosed?
CVE-2026-15640 was first published in the National Vulnerability Database on September 15, 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-2026-15640 actively exploited?
CVE-2026-15640 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 79.5% of all scored CVEs.
What is the CVSS score of CVE-2026-15640?
CVE-2026-15640 has a CVSS v3 base score of 9.5 (NVD).
How do I remediate CVE-2026-15640?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-15640, 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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