CVE-2026-86815

MEDIUMPre-NVD 5.55.5—
EchelonGraph scoreHIGH confidence

Score 5.5 from GitHub Security Advisory published 2026-09-11. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: None knownExposed: 0

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

The BackWPup WordPress plugin before 5.7.5 does not properly restrict access to several of its REST API routes for job, backup-destination, and backup-execution management, allowing users holding a BackWPup WordPress plugin before 5.7.5-defined, administrator-assigned limited role to create and run backup jobs and exfiltrate a full database backup to an attacker-controlled destination.

CVSS v3
5.5
EG Score
5.5(high)
EG Risk
25(Track)
EG Risk 25/100SSVC: 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
Severity55% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
29%
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

BackWPup 5.2.2 – 5.7.4 – BackWPup Jobs Checker+ Database Backup Exfiltration via Missing Authorization on Job REST Routes | CVE 2026-86815 | Plugin Vulnerabilities

https://wpscan.com/vulnerability/fa66c458-f14f-47bc-87e6-b603200ef8e9/

Vendor Advisories for CVE-2026-86815(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 22× in last 7d / 48× 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 11:23 UTCEG score recompute
  2. 2026-09-25 11:23 UTCGHSA enrichment
  3. 2026-09-24 14:04 UTCEPSS rescore
  4. 2026-09-24 11:51 UTCEG score recompute
  5. 2026-09-24 11:51 UTCGHSA enrichment
  6. 2026-09-23 17:54 UTCEPSS rescore
  7. 2026-09-23 12:18 UTCEG score recompute
  8. 2026-09-23 12:18 UTCGHSA enrichment
  9. 2026-09-22 16:01 UTCEPSS rescore
  10. 2026-09-22 12:44 UTCEG score recompute
  11. 2026-09-22 12:44 UTCGHSA enrichment
  12. 2026-09-21 21:09 UTCEPSS rescore
  13. 2026-09-21 13:13 UTCEG score recompute
  14. 2026-09-21 13:13 UTCGHSA enrichment
  15. 2026-09-20 20:16 UTCEPSS rescore
  16. 2026-09-20 13:42 UTCEG score recompute
  17. 2026-09-20 13:42 UTCGHSA enrichment
  18. 2026-09-19 14:09 UTCEG score recompute
  19. 2026-09-19 14:09 UTCGHSA enrichment
  20. 2026-09-18 19:28 UTCEPSS rescore
  21. 2026-09-18 14:38 UTCEG score recompute
  22. 2026-09-18 14:38 UTCGHSA enrichment
  23. 2026-09-17 19:32 UTCEPSS rescore
  24. 2026-09-17 15:06 UTCGHSA enrichment
  25. 2026-09-16 15:34 UTCEG score recompute
Show 23 more
  1. 2026-09-16 15:34 UTCGHSA enrichment
  2. 2026-09-16 14:09 UTCEPSS rescore
  3. 2026-09-16 05:15 UTCEPSS rescore
  4. 2026-09-15 15:59 UTCEG score recompute
  5. 2026-09-15 15:59 UTCGHSA enrichment
  6. 2026-09-15 03:12 UTCEPSS rescore
  7. 2026-09-15 03:12 UTCEPSS rescore
  8. 2026-09-14 16:27 UTCGHSA enrichment
  9. 2026-09-13 16:56 UTCEG score recompute
  10. 2026-09-13 16:56 UTCGHSA enrichment
  11. 2026-09-12 17:24 UTCEG score recompute
  12. 2026-09-12 17:24 UTCGHSA enrichment
  13. 2026-09-11 17:53 UTCEG score recompute
  14. 2026-09-11 17:53 UTCGHSA enrichment
  15. 2026-09-11 14:53 UTCEPSS rescore
  16. 2026-09-11 14:53 UTCEPSS rescore
  17. 2026-09-11 10:23 UTCGHSA enrichment
  18. 2026-09-11 10:06 UTCEG score recompute▲ 5.50
  19. 2026-09-11 10:06 UTCGHSA enrichment
  20. 2026-09-11 10:04 UTCMITRE cvelistV5CVSS v3 → 5.5 · severity → MEDIUM
  21. 2026-09-11 07:21 UTCNVD update
  22. 2026-09-11 06:30 UTCEG score recompute
  23. 2026-09-11 06:29 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-86815?
CVE-2026-86815 is a medium vulnerability published on September 11, 2026. The BackWPup WordPress plugin before 5.7.5 does not properly restrict access to several of its REST API routes for job, backup-destination, and backup-execution management, allowing users holding a BackWPup WordPress plugin before 5.7.5-defined, administrator-assigned limited role to create and run…
When was CVE-2026-86815 disclosed?
CVE-2026-86815 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-2026-86815 actively exploited?
CVE-2026-86815 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 70.6% of all scored CVEs.
What is the CVSS score of CVE-2026-86815?
CVE-2026-86815 has a CVSS v3.1 base score of 5.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-86815?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-86815, 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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