CVE-2026-89282

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreHIGH confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-22. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 5 sources updated this week
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.1Exploit: None knownExposed: 0

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

The Apache Lounge Windows distribution of Apache HTTP Server build contains an insecure installation directory permissions vulnerability through its default install directory on C:\, which inherits write access for Authenticated Users.

CVSS v3
9.1
EG Score
9.1(high)
EG Risk
56(Track)
EG Risk 56/100SSVC: 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
Severity91% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
10%
KEV
Not listed

Published

September 22, 2026

Last Modified

September 23, 2026

Advisory Details (3)

Auto-updated Sep 23, 2026
No patch confirmed yet.
generic

Apache :: HOWTO: Securing Windows filesystem for Apache

https://www.apachelounge.com/viewtopic.php?t=9515
generic

A tale of several hijacks and what it taught me about runtime-driven testing - Atos

https://atos.net/en/lp/cybershield/a-tale-of-several-hijacks-and-what-it-taught-me-about-runtime-driven-testing
generic

Download - The Apache HTTP Server Project

https://httpd.apache.org/download.cgi

Vendor Advisories for CVE-2026-89282(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 14× in last 7d / 14× 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 02:34 UTCGHSA enrichment
  2. 2026-09-23 22:17 UTCGHSA enrichment
  3. 2026-09-23 18:01 UTCEG score recompute
  4. 2026-09-23 18:01 UTCGHSA enrichment
  5. 2026-09-23 17:54 UTCEPSS rescore
  6. 2026-09-23 17:34 UTCEG score recompute
  7. 2026-09-23 17:34 UTCGHSA enrichment
  8. 2026-09-23 13:18 UTCGHSA enrichment
  9. 2026-09-23 12:46 UTCEG score recompute▲ 9.10
  10. 2026-09-23 12:46 UTCGHSA enrichment
  11. 2026-09-23 12:45 UTCMITRE cvelistV5CVSS v3 → 9.1 · severity → CRITICAL
  12. 2026-09-22 20:32 UTCNVD update
  13. 2026-09-22 19:23 UTCEG score recompute
  14. 2026-09-22 19:23 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-89282?
CVE-2026-89282 is a critical vulnerability published on September 22, 2026. The Apache Lounge Windows distribution of Apache HTTP Server build contains an insecure installation directory permissions vulnerability through its default install directory on C:\, which inherits write access for Authenticated Users.
When was CVE-2026-89282 disclosed?
CVE-2026-89282 was first published in the National Vulnerability Database on September 22, 2026, with the most recent update on September 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-89282 actively exploited?
CVE-2026-89282 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 90.4% of all scored CVEs.
What is the CVSS score of CVE-2026-89282?
CVE-2026-89282 has a CVSS v3.1 base score of 9.1 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-89282?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-89282, 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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