CVE-2026-77009

CRITICALPre-NVD 9.99.9—
EchelonGraph scoreHIGH confidence

Score 9.9 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-02. a secondary CVSS source baseline 9.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
9.9EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.9Exploit: None knownExposed: 0

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

The WatchMan-Site7 WordPress plugin through 4.2.0 does not restrict access to its debugging console, which executes user-supplied PHP code, allowing any authenticated user, such as a subscriber, to run arbitrary code on the server.

CVSS v3
9.9
EG Score
9.9(high)
EG Risk
45(Track)
EG Risk 45/100SSVC: 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
Severity99% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
42%
KEV
Not listed

Published

September 2, 2026

Last Modified

September 3, 2026

Advisory Details (1)

Auto-updated Sep 24, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

WatchMan-Site7 3.1.1 – 4.2.0 – Subscriber+ RCE via Debug Console | CVE 2026-77009 | Plugin Vulnerabilities

https://wpscan.com/vulnerability/2881cd28-6c30-4942-9443-317dd19f1e4a/

Vendor Advisories for CVE-2026-77009(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 53× in last 7d / 169× 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.

Showing the most recent 100 of 169 total refreshes for this CVE.

  1. 2026-09-25 11:55 UTCGHSA enrichment
  2. 2026-09-25 07:43 UTCGHSA enrichment
  3. 2026-09-25 03:31 UTCGHSA enrichment
  4. 2026-09-24 23:19 UTCGHSA enrichment
  5. 2026-09-24 18:31 UTCEG score recompute
  6. 2026-09-24 18:30 UTCGHSA enrichment
  7. 2026-09-24 14:04 UTCEPSS rescore
  8. 2026-09-24 13:43 UTCGHSA enrichment
  9. 2026-09-24 09:31 UTCGHSA enrichment
  10. 2026-09-24 05:14 UTCGHSA enrichment
  11. 2026-09-24 01:01 UTCGHSA enrichment
  12. 2026-09-23 20:49 UTCEG score recompute
  13. 2026-09-23 20:49 UTCGHSA enrichment
  14. 2026-09-23 17:54 UTCEPSS rescore
  15. 2026-09-23 16:37 UTCGHSA enrichment
  16. 2026-09-23 12:23 UTCGHSA enrichment
  17. 2026-09-23 08:11 UTCGHSA enrichment
  18. 2026-09-23 03:59 UTCGHSA enrichment
  19. 2026-09-22 23:46 UTCGHSA enrichment
  20. 2026-09-22 19:34 UTCEG score recompute
  21. 2026-09-22 19:34 UTCGHSA enrichment
  22. 2026-09-22 16:01 UTCEPSS rescore
  23. 2026-09-22 15:22 UTCGHSA enrichment
  24. 2026-09-22 11:09 UTCGHSA enrichment
  25. 2026-09-22 06:57 UTCGHSA enrichment
Show 75 more
  1. 2026-09-22 02:45 UTCGHSA enrichment
  2. 2026-09-21 22:33 UTCEG score recompute
  3. 2026-09-21 22:32 UTCGHSA enrichment
  4. 2026-09-21 21:09 UTCEPSS rescore
  5. 2026-09-21 18:20 UTCGHSA enrichment
  6. 2026-09-21 14:08 UTCGHSA enrichment
  7. 2026-09-21 09:55 UTCGHSA enrichment
  8. 2026-09-21 05:43 UTCGHSA enrichment
  9. 2026-09-21 01:31 UTCGHSA enrichment
  10. 2026-09-20 21:08 UTCEG score recompute
  11. 2026-09-20 21:08 UTCGHSA enrichment
  12. 2026-09-20 20:16 UTCEPSS rescore
  13. 2026-09-20 16:49 UTCGHSA enrichment
  14. 2026-09-20 12:32 UTCGHSA enrichment
  15. 2026-09-20 08:10 UTCGHSA enrichment
  16. 2026-09-20 03:45 UTCGHSA enrichment
  17. 2026-09-19 23:33 UTCGHSA enrichment
  18. 2026-09-19 19:20 UTCEG score recompute
  19. 2026-09-19 19:20 UTCGHSA enrichment
  20. 2026-09-19 14:57 UTCGHSA enrichment
  21. 2026-09-19 10:45 UTCGHSA enrichment
  22. 2026-09-19 06:14 UTCGHSA enrichment
  23. 2026-09-19 02:02 UTCGHSA enrichment
  24. 2026-09-18 21:50 UTCEG score recompute
  25. 2026-09-18 21:50 UTCGHSA enrichment
  26. 2026-09-18 19:28 UTCEPSS rescore
  27. 2026-09-18 17:38 UTCGHSA enrichment
  28. 2026-09-18 13:26 UTCGHSA enrichment
  29. 2026-09-18 09:14 UTCGHSA enrichment
  30. 2026-09-18 05:02 UTCGHSA enrichment
  31. 2026-09-18 00:50 UTCGHSA enrichment
  32. 2026-09-17 20:38 UTCEG score recompute
  33. 2026-09-17 20:38 UTCGHSA enrichment
  34. 2026-09-17 13:02 UTCGHSA enrichment
  35. 2026-09-17 08:37 UTCGHSA enrichment
  36. 2026-09-17 04:25 UTCGHSA enrichment
  37. 2026-09-17 00:12 UTCGHSA enrichment
  38. 2026-09-16 20:00 UTCGHSA enrichment
  39. 2026-09-16 15:37 UTCEG score recompute
  40. 2026-09-16 15:37 UTCGHSA enrichment
  41. 2026-09-16 14:08 UTCEPSS rescore
  42. 2026-09-16 11:10 UTCGHSA enrichment
  43. 2026-09-16 06:58 UTCEG score recompute
  44. 2026-09-16 06:58 UTCGHSA enrichment
  45. 2026-09-16 05:15 UTCEPSS rescore
  46. 2026-09-16 02:45 UTCGHSA enrichment
  47. 2026-09-15 22:32 UTCGHSA enrichment
  48. 2026-09-15 18:20 UTCGHSA enrichment
  49. 2026-09-15 14:08 UTCGHSA enrichment
  50. 2026-09-15 09:56 UTCGHSA enrichment
  51. 2026-09-15 05:44 UTCEG score recompute
  52. 2026-09-15 05:44 UTCGHSA enrichment
  53. 2026-09-15 03:12 UTCEPSS rescore
  54. 2026-09-15 01:32 UTCGHSA enrichment
  55. 2026-09-14 21:20 UTCGHSA enrichment
  56. 2026-09-14 17:05 UTCGHSA enrichment
  57. 2026-09-14 12:53 UTCGHSA enrichment
  58. 2026-09-14 08:41 UTCGHSA enrichment
  59. 2026-09-14 04:28 UTCGHSA enrichment
  60. 2026-09-14 00:16 UTCGHSA enrichment
  61. 2026-09-13 20:04 UTCEG score recompute
  62. 2026-09-13 20:04 UTCGHSA enrichment
  63. 2026-09-13 15:52 UTCGHSA enrichment
  64. 2026-09-13 11:40 UTCGHSA enrichment
  65. 2026-09-13 07:27 UTCGHSA enrichment
  66. 2026-09-13 03:16 UTCGHSA enrichment
  67. 2026-09-12 23:04 UTCGHSA enrichment
  68. 2026-09-12 18:52 UTCEG score recompute
  69. 2026-09-12 18:52 UTCGHSA enrichment
  70. 2026-09-12 15:02 UTCEPSS rescore
  71. 2026-09-12 14:40 UTCGHSA enrichment
  72. 2026-09-12 10:28 UTCGHSA enrichment
  73. 2026-09-12 06:15 UTCGHSA enrichment
  74. 2026-09-12 02:03 UTCGHSA enrichment
  75. 2026-09-11 21:51 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-77009?
CVE-2026-77009 is a critical vulnerability published on September 2, 2026. The WatchMan-Site7 WordPress plugin through 4.2.0 does not restrict access to its debugging console, which executes user-supplied PHP code, allowing any authenticated user, such as a subscriber, to run arbitrary code on the server.
When was CVE-2026-77009 disclosed?
CVE-2026-77009 was first published in the National Vulnerability Database on September 2, 2026, with the most recent update on September 3, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-77009 actively exploited?
CVE-2026-77009 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 58.5% of all scored CVEs.
What is the CVSS score of CVE-2026-77009?
CVE-2026-77009 has a CVSS v3 base score of 9.9 (NVD).
How do I remediate CVE-2026-77009?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-77009, 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.

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