CVE-2026-86709

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-17. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 0

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

The Pressengine WordPress plugin through 1.0 does not stop its login handler from issuing a session when authentication fails, allowing unauthenticated attackers to log in as any user, including administrators.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
59(Track)
EG Risk 59/100SSVC: 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
Severity98% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
48%
KEV
Not listed

Published

September 17, 2026

Last Modified

September 18, 2026

Advisory Details (1)

Auto-updated Sep 18, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

The Pressengine <= 1.0 – Unauthenticated Authentication Bypass | CVE 2026-86709 | Plugin Vulnerabilities

https://wpscan.com/vulnerability/4b0b16eb-c638-479b-ab65-1cead53f32a8/

Vendor Advisories for CVE-2026-86709(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 58× in last 7d / 73× 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. 2026-09-25 10:19 UTCGHSA enrichment
  2. 2026-09-25 06:33 UTCGHSA enrichment
  3. 2026-09-25 02:47 UTCGHSA enrichment
  4. 2026-09-24 23:00 UTCGHSA enrichment
  5. 2026-09-24 18:51 UTCGHSA enrichment
  6. 2026-09-24 15:05 UTCEG score recompute
  7. 2026-09-24 15:05 UTCGHSA enrichment
  8. 2026-09-24 14:04 UTCEPSS rescore
  9. 2026-09-24 11:11 UTCGHSA enrichment
  10. 2026-09-24 07:24 UTCGHSA enrichment
  11. 2026-09-24 03:39 UTCGHSA enrichment
  12. 2026-09-23 23:52 UTCGHSA enrichment
  13. 2026-09-23 20:06 UTCEG score recompute
  14. 2026-09-23 20:06 UTCGHSA enrichment
  15. 2026-09-23 17:54 UTCEPSS rescore
  16. 2026-09-23 16:20 UTCGHSA enrichment
  17. 2026-09-23 12:32 UTCGHSA enrichment
  18. 2026-09-23 08:46 UTCGHSA enrichment
  19. 2026-09-23 05:00 UTCGHSA enrichment
  20. 2026-09-23 01:13 UTCGHSA enrichment
  21. 2026-09-22 21:27 UTCGHSA enrichment
  22. 2026-09-22 17:40 UTCEG score recompute
  23. 2026-09-22 17:40 UTCGHSA enrichment
  24. 2026-09-22 16:01 UTCEPSS rescore
  25. 2026-09-22 13:46 UTCGHSA enrichment
Show 48 more
  1. 2026-09-22 10:00 UTCGHSA enrichment
  2. 2026-09-22 06:14 UTCGHSA enrichment
  3. 2026-09-22 02:28 UTCGHSA enrichment
  4. 2026-09-21 22:42 UTCEG score recompute
  5. 2026-09-21 22:42 UTCGHSA enrichment
  6. 2026-09-21 21:09 UTCEPSS rescore
  7. 2026-09-21 18:56 UTCGHSA enrichment
  8. 2026-09-21 15:10 UTCGHSA enrichment
  9. 2026-09-21 11:23 UTCGHSA enrichment
  10. 2026-09-21 07:37 UTCGHSA enrichment
  11. 2026-09-21 03:51 UTCGHSA enrichment
  12. 2026-09-21 00:05 UTCGHSA enrichment
  13. 2026-09-20 20:19 UTCEG score recompute
  14. 2026-09-20 20:19 UTCGHSA enrichment
  15. 2026-09-20 20:16 UTCEPSS rescore
  16. 2026-09-20 16:32 UTCGHSA enrichment
  17. 2026-09-20 12:45 UTCGHSA enrichment
  18. 2026-09-20 08:59 UTCGHSA enrichment
  19. 2026-09-20 05:13 UTCGHSA enrichment
  20. 2026-09-20 01:27 UTCGHSA enrichment
  21. 2026-09-19 21:40 UTCGHSA enrichment
  22. 2026-09-19 17:53 UTCEG score recompute
  23. 2026-09-19 17:53 UTCGHSA enrichment
  24. 2026-09-19 14:07 UTCGHSA enrichment
  25. 2026-09-19 10:20 UTCGHSA enrichment
  26. 2026-09-19 06:34 UTCGHSA enrichment
  27. 2026-09-19 02:46 UTCGHSA enrichment
  28. 2026-09-18 23:00 UTCEG score recompute
  29. 2026-09-18 23:00 UTCGHSA enrichment
  30. 2026-09-18 19:28 UTCEPSS rescore
  31. 2026-09-18 19:14 UTCGHSA enrichment
  32. 2026-09-18 16:57 UTCGHSA enrichment
  33. 2026-09-18 13:10 UTCGHSA enrichment
  34. 2026-09-18 09:24 UTCGHSA enrichment
  35. 2026-09-18 05:37 UTCGHSA enrichment
  36. 2026-09-18 01:51 UTCGHSA enrichment
  37. 2026-09-17 22:05 UTCEG score recompute
  38. 2026-09-17 22:05 UTCGHSA enrichment
  39. 2026-09-17 19:32 UTCEPSS rescore
  40. 2026-09-17 18:18 UTCEG score recompute
  41. 2026-09-17 18:18 UTCGHSA enrichment
  42. 2026-09-17 13:22 UTCGHSA enrichment
  43. 2026-09-17 12:38 UTCEG score recompute▲ 9.80
  44. 2026-09-17 12:37 UTCGHSA enrichment
  45. 2026-09-17 12:34 UTCMITRE cvelistV5CVSS v3 → 9.8 · severity → CRITICAL
  46. 2026-09-17 06:23 UTCNVD update
  47. 2026-09-17 06:04 UTCEG score recompute
  48. 2026-09-17 06:04 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-86709?
CVE-2026-86709 is a critical vulnerability published on September 17, 2026. The Pressengine WordPress plugin through 1.0 does not stop its login handler from issuing a session when authentication fails, allowing unauthenticated attackers to log in as any user, including administrators.
When was CVE-2026-86709 disclosed?
CVE-2026-86709 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-2026-86709 actively exploited?
CVE-2026-86709 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 52.3% of all scored CVEs.
What is the CVSS score of CVE-2026-86709?
CVE-2026-86709 has a CVSS v3.1 base score of 9.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-86709?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-86709, 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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