CVE-2026-86781

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreHIGH confidence

Score 5.3 from GitHub Security Advisory published 2026-09-11. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: None knownExposed: 0

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

The SSL Zen — SSL Certificate Installer & HTTPS Redirects WordPress plugin before 4.7.40 does not perform capability or nonce checks on a certificate-file download routine that runs early in the WordPress admin request lifecycle, allowing any authenticated user, including Subscribers, to download the site's TLS private key, certificates, and diagnostic logs.

CVSS v3
5.3
EG Score
5.3(high)
EG Risk
24(Track)
EG Risk 24/100SSVC: 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
Severity53% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
7%
KEV
Not listed

Published

September 11, 2026

Last Modified

September 11, 2026

Advisory Details (1)

Auto-updated Sep 11, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

SSL Zen < 4.7.40 – Subscriber+ TLS Private Key Disclosure | CVE 2026-86781 | Plugin Vulnerabilities

https://wpscan.com/vulnerability/858977f8-8ea3-4d3d-8967-31567f6786ff/

Vendor Advisories for CVE-2026-86781(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 18× 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. 2026-09-24 19:53 UTCEG score recompute
  2. 2026-09-24 19:53 UTCGHSA enrichment
  3. 2026-09-24 14:04 UTCEPSS rescore
  4. 2026-09-23 17:54 UTCEPSS rescore
  5. 2026-09-23 17:43 UTCEG score recompute
  6. 2026-09-23 17:43 UTCGHSA enrichment
  7. 2026-09-22 16:01 UTCEPSS rescore
  8. 2026-09-22 15:33 UTCEG score recompute
  9. 2026-09-22 15:33 UTCGHSA enrichment
  10. 2026-09-21 21:09 UTCEPSS rescore
  11. 2026-09-21 13:23 UTCEG score recompute
  12. 2026-09-21 13:23 UTCGHSA enrichment
  13. 2026-09-20 20:16 UTCEPSS rescore
  14. 2026-09-20 11:13 UTCEG score recompute
  15. 2026-09-20 11:13 UTCGHSA enrichment
  16. 2026-09-19 09:03 UTCEG score recompute
  17. 2026-09-19 09:03 UTCGHSA enrichment
  18. 2026-09-18 19:28 UTCEPSS rescore
  19. 2026-09-18 06:53 UTCEG score recompute
  20. 2026-09-18 06:53 UTCGHSA enrichment
  21. 2026-09-17 19:32 UTCEPSS rescore
  22. 2026-09-17 04:43 UTCEG score recompute
  23. 2026-09-17 04:43 UTCGHSA enrichment
  24. 2026-09-16 14:09 UTCEPSS rescore
  25. 2026-09-16 05:15 UTCEPSS rescore
Show 20 more
  1. 2026-09-16 02:33 UTCEG score recompute
  2. 2026-09-16 02:33 UTCGHSA enrichment
  3. 2026-09-15 03:12 UTCEPSS rescore
  4. 2026-09-15 03:12 UTCEPSS rescore
  5. 2026-09-15 00:23 UTCGHSA enrichment
  6. 2026-09-13 22:13 UTCEG score recompute
  7. 2026-09-13 22:13 UTCGHSA enrichment
  8. 2026-09-12 20:03 UTCEG score recompute
  9. 2026-09-12 20:03 UTCGHSA enrichment
  10. 2026-09-11 17:53 UTCEG score recompute
  11. 2026-09-11 17:53 UTCGHSA enrichment
  12. 2026-09-11 14:53 UTCEPSS rescore
  13. 2026-09-11 14:53 UTCEPSS rescore
  14. 2026-09-11 10:23 UTCGHSA enrichment
  15. 2026-09-11 10:06 UTCEG score recompute▲ 5.30
  16. 2026-09-11 10:06 UTCGHSA enrichment
  17. 2026-09-11 10:04 UTCMITRE cvelistV5CVSS v3 → 5.3 · severity → MEDIUM
  18. 2026-09-11 07:21 UTCNVD update
  19. 2026-09-11 06:30 UTCEG score recompute
  20. 2026-09-11 06:29 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-86781?
CVE-2026-86781 is a medium vulnerability published on September 11, 2026. The SSL Zen — SSL Certificate Installer & HTTPS Redirects WordPress plugin before 4.7.40 does not perform capability or nonce checks on a certificate-file download routine that runs early in the WordPress admin request lifecycle, allowing any authenticated user, including Subscribers, to download…
When was CVE-2026-86781 disclosed?
CVE-2026-86781 was first published in the National Vulnerability Database on September 11, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-86781 actively exploited?
CVE-2026-86781 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 93.4% of all scored CVEs.
What is the CVSS score of CVE-2026-86781?
CVE-2026-86781 has a CVSS v3.1 base score of 5.3 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-86781?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-86781, 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-2026-86781

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