CVE-2026-12166

MEDIUMPre-NVD 5.55.5—
EchelonGraph scoreHIGH confidence

Score 5.5 from GitHub Security Advisory published 2026-07-02. 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 — 4 sources updated this week
5.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.5Exploit: NoneExposed: 0

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

A NULL pointer dereference vulnerability for driver GFAC_Sys_x64.sys in Little Orbit GFAC allows a local attacker to cause a denial of service via crafted requests that trigger a system crash.

CVSS v3
5.5
EG Score
5.5(high)
EPSS
6.6%
KEV
Not listed

Published

July 2, 2026

Last Modified

July 2, 2026

Advisory Details (2)

Auto-updated Jul 6, 2026
🔬 Proof of concept available. No patch confirmed yet. Sources: cert.
cert

VU#639124 - Multiple local privilege escalation vulnerabilities in Little Orbits GameFirst Anti-Cheat

https://kb.cert.org/vuls/id/639124
generic🟡 PoC Available

GitHub - FzRsLLaSheR/CVE-2026-12166_CVE-2026-12167_CVE-2026-12168 · GitHub

https://github.com/FzRsLLaSheR/CVE-2026-12166_CVE-2026-12167_CVE-2026-12168

Vendor Advisories for CVE-2026-12166(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Data Freshness Timeline

(refreshed 11× in last 7d / 11× 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. 2026-07-06 23:19 UTCEG score recompute
  2. 2026-07-06 23:19 UTCGHSA enrichment
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-05 23:17 UTCEG score recompute▲ 5.50
  5. 2026-07-05 23:17 UTCGHSA enrichment
  6. 2026-07-05 02:30 UTCEPSS rescore
  7. 2026-07-05 02:30 UTCEPSS rescore
  8. 2026-07-04 06:31 UTCEPSS rescore
  9. 2026-07-02 20:05 UTCNVD updateCVSS v3 → 5.5 · severity → MEDIUM
  10. 2026-07-02 16:24 UTCEG score recompute
  11. 2026-07-02 16:24 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-12166?
CVE-2026-12166 is a medium vulnerability published on July 2, 2026. A NULL pointer dereference vulnerability for driver GFACSysx64.sys in Little Orbit GFAC allows a local attacker to cause a denial of service via crafted requests that trigger a system crash.
When was CVE-2026-12166 disclosed?
CVE-2026-12166 was first published in the National Vulnerability Database on July 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-12166 actively exploited?
CVE-2026-12166 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 6.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-12166?
CVE-2026-12166 has a CVSS v3.1 base score of 5.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-12166?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-12166, 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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