CVE-2026-43641

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-22. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this weekElevated
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 3%CVSS: 9.8Exploit: Elevated riskExposed: 0

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

Softaculous Virtualizor before 3.2.9 (Patch 9) and 3.0.0 contains an OS command injection vulnerability in the billing module handler that allows unauthenticated remote attackers to execute arbitrary commands as root by bypassing authentication through specific parameter combinations. Attackers can deserialize a crafted billing_data POST field and inject shell payloads through the uid field, which is passed unmodified to proc_open() via vexec(), yielding complete control of the host and all managed VPS instances.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
75(Attend)
EG Risk 75/100SSVC: Attend

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%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
3%
EPSS %ILE
87%
KEV
Not listed

Published

September 22, 2026

Last Modified

September 23, 2026

Advisory Details (4)

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

Virtualizor: The Login Parameter That Skips the Login | Blog | VulnCheck

https://www.vulncheck.com/blog/virtualizor-billing-hook-unauthenticated-root-rce
generic

Softaculous Virtualizor OS Command Injection via Billing Module Handler | Advisories | VulnCheck

https://www.vulncheck.com/advisories/softaculous-virtualizor-os-command-injection-via-billing-module-handler
generic

Virtualizor 3.3.0 – Virtualizor

https://www.virtualizor.com/blog/virtualizor-3-3-0/
generic

Virtualizor 3.2.9 Launched (Patch 9) – Virtualizor

https://www.virtualizor.com/blog/virtualizor-3-2-9-launched-release-candidate-patch-9/

Vendor Advisories for CVE-2026-43641(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 / 18× 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 04:48 UTCGHSA enrichment
  2. 2026-09-24 00:38 UTCGHSA enrichment
  3. 2026-09-23 20:28 UTCEG score recompute
  4. 2026-09-23 20:28 UTCGHSA enrichment
  5. 2026-09-23 17:53 UTCEPSS rescore
  6. 2026-09-23 16:19 UTCEG score recompute
  7. 2026-09-23 16:19 UTCGHSA enrichment
  8. 2026-09-23 15:49 UTCEG score recompute
  9. 2026-09-23 15:49 UTCGHSA enrichment
  10. 2026-09-23 13:31 UTCGHSA enrichment
  11. 2026-09-23 09:21 UTCGHSA enrichment
  12. 2026-09-23 05:12 UTCGHSA enrichment
  13. 2026-09-23 01:02 UTCGHSA enrichment
  14. 2026-09-22 20:52 UTCEG score recompute
  15. 2026-09-22 20:52 UTCGHSA enrichment
  16. 2026-09-22 18:30 UTCEG score recompute
  17. 2026-09-22 17:58 UTCEG score recompute
  18. 2026-09-22 17:58 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-43641?
CVE-2026-43641 is a critical vulnerability published on September 22, 2026. Softaculous Virtualizor before 3.2.9 (Patch 9) and 3.0.0 contains an OS command injection vulnerability in the billing module handler that allows unauthenticated remote attackers to execute arbitrary commands as root by bypassing authentication through specific parameter combinations. Attackers can…
When was CVE-2026-43641 disclosed?
CVE-2026-43641 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-2026-43641 actively exploited?
CVE-2026-43641 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3% probability of exploitation in the next 30 days, which ranks it in the top 13.1% of all scored CVEs.
What is the CVSS score of CVE-2026-43641?
CVE-2026-43641 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-43641?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43641, 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-2026-43641

Explore →

Is Your Infrastructure Affected by CVE-2026-43641?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs