CVE-2026-15580

MEDIUMPre-NVD 6.96.9—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.9 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 91% 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 — 3 sources updated this week
6.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.9Exploit: None knownExposed: 0

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

vault token disclosure via unvalidated postMessage vulnerability in N-able PassPortal allows Authentication Abuse.

This issue affects the PassPortal browser extension: before 3.49.6.

CVSS v3
6.9
EG Score
6.9(medium)
EG Risk
31(Track)
EG Risk 31/100SSVC: 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
Severity69% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
9%
KEV
Not listed

Published

August 21, 2026

Last Modified

September 8, 2026

Advisory Details (1)

Auto-updated Aug 21, 2026
No patch confirmed yet.
generic

NableMe

https://me.n-able.com/s/security-advisory/aArVy0000002GQTKA2/cve202615580-vault-token-disclosure-via-unvalidated-postmessage

Vendor Advisories for CVE-2026-15580(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 19× in last 7d / 78× 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 14:17 UTCEG score recompute
  2. 2026-09-19 14:17 UTCGHSA enrichment
  3. 2026-09-18 19:27 UTCEPSS rescore
  4. 2026-09-18 12:28 UTCEG score recompute
  5. 2026-09-18 12:28 UTCGHSA enrichment
  6. 2026-09-17 11:02 UTCEG score recompute
  7. 2026-09-17 11:02 UTCGHSA enrichment
  8. 2026-09-16 14:07 UTCEPSS rescore
  9. 2026-09-16 09:37 UTCEG score recompute
  10. 2026-09-16 09:37 UTCGHSA enrichment
  11. 2026-09-16 05:14 UTCEPSS rescore
  12. 2026-09-15 07:49 UTCEG score recompute
  13. 2026-09-15 07:49 UTCGHSA enrichment
  14. 2026-09-14 06:24 UTCEG score recompute
  15. 2026-09-14 06:24 UTCGHSA enrichment
  16. 2026-09-13 16:46 UTCEPSS rescore
  17. 2026-09-13 05:00 UTCEG score recompute
  18. 2026-09-13 05:00 UTCGHSA enrichment
  19. 2026-09-12 15:00 UTCEPSS rescore
  20. 2026-09-12 03:35 UTCEG score recompute
  21. 2026-09-12 03:35 UTCGHSA enrichment
  22. 2026-09-11 14:52 UTCEPSS rescore
  23. 2026-09-11 09:36 UTCEPSS rescore
  24. 2026-09-11 02:10 UTCEG score recompute
  25. 2026-09-11 02:10 UTCGHSA enrichment
Show 53 more
  1. 2026-09-10 09:34 UTCEPSS rescore
  2. 2026-09-10 00:46 UTCEG score recompute
  3. 2026-09-10 00:45 UTCGHSA enrichment
  4. 2026-09-08 22:00 UTCEPSS rescore
  5. 2026-09-08 20:05 UTCEG score recompute
  6. 2026-09-08 20:05 UTCGHSA enrichment
  7. 2026-09-07 16:01 UTCEPSS rescore
  8. 2026-09-07 15:29 UTCGHSA enrichment
  9. 2026-09-06 13:56 UTCEG score recompute
  10. 2026-09-06 13:56 UTCGHSA enrichment
  11. 2026-09-06 13:47 UTCEPSS rescore
  12. 2026-09-05 12:31 UTCEG score recompute
  13. 2026-09-05 12:31 UTCGHSA enrichment
  14. 2026-09-04 11:04 UTCEG score recompute
  15. 2026-09-04 11:04 UTCGHSA enrichment
  16. 2026-09-04 05:06 UTCEPSS rescore
  17. 2026-09-03 09:34 UTCEG score recompute
  18. 2026-09-03 09:34 UTCGHSA enrichment
  19. 2026-09-02 14:11 UTCEPSS rescore
  20. 2026-09-02 08:05 UTCEG score recompute
  21. 2026-09-02 08:04 UTCGHSA enrichment
  22. 2026-09-01 13:53 UTCEPSS rescore
  23. 2026-09-01 06:38 UTCEG score recompute
  24. 2026-09-01 06:38 UTCGHSA enrichment
  25. 2026-09-01 04:39 UTCEPSS rescore
  26. 2026-08-31 05:12 UTCEG score recompute
  27. 2026-08-31 05:12 UTCGHSA enrichment
  28. 2026-08-30 19:17 UTCEPSS rescore
  29. 2026-08-30 03:47 UTCEG score recompute
  30. 2026-08-30 03:47 UTCGHSA enrichment
  31. 2026-08-30 01:22 UTCEPSS rescore
  32. 2026-08-29 02:23 UTCEG score recompute
  33. 2026-08-29 02:22 UTCGHSA enrichment
  34. 2026-08-28 21:41 UTCEPSS rescore
  35. 2026-08-28 00:52 UTCGHSA enrichment
  36. 2026-08-26 23:26 UTCEG score recompute
  37. 2026-08-26 23:26 UTCGHSA enrichment
  38. 2026-08-26 14:46 UTCEPSS rescore
  39. 2026-08-25 22:01 UTCEG score recompute
  40. 2026-08-25 22:00 UTCGHSA enrichment
  41. 2026-08-25 13:48 UTCEPSS rescore
  42. 2026-08-24 20:36 UTCEG score recompute
  43. 2026-08-24 20:35 UTCGHSA enrichment
  44. 2026-08-23 19:10 UTCEG score recompute
  45. 2026-08-23 19:10 UTCGHSA enrichment
  46. 2026-08-23 00:19 UTCEPSS rescore
  47. 2026-08-22 17:46 UTCGHSA enrichment
  48. 2026-08-21 16:21 UTCEG score recompute
  49. 2026-08-21 16:21 UTCGHSA enrichment
  50. 2026-08-21 15:24 UTCEG score recompute
  51. 2026-08-21 14:21 UTCEG score recompute
  52. 2026-08-21 14:10 UTCEG score recompute
  53. 2026-08-21 14:09 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-15580?
CVE-2026-15580 is a medium vulnerability published on August 21, 2026. vault token disclosure via unvalidated postMessage vulnerability in N-able PassPortal allows Authentication Abuse. This issue affects the PassPortal browser extension: before 3.49.6.
When was CVE-2026-15580 disclosed?
CVE-2026-15580 was first published in the National Vulnerability Database on August 21, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-15580 actively exploited?
CVE-2026-15580 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 91.1% of all scored CVEs.
What is the CVSS score of CVE-2026-15580?
CVE-2026-15580 has a CVSS v3 base score of 6.9 (NVD).
How do I remediate CVE-2026-15580?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-15580, 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-2026-15580

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