CVE-2015-4523

CRITICALNVD 9.39.3—
EchelonGraph scoreMEDIUM confidence

Score 9.3 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-14. NVD baseline CVSS 9.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Weaponized
9.3EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • Public exploit code is available (Exploit-DB (verified), public exploit)
CISA-KEV: Not listedEPSS PROB: 4%CVSS: 9.3Exploit: Exploit-DB (verified) · public exploitExposed: 0

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

Blue Coat Malware Analysis Appliance (MAA) before 4.2.5 and Malware Analyzer G2 allow remote attackers to bypass a virtual machine protection mechanism and consequently write to arbitrary files, cause a denial of service (host reboot or reset to factory defaults), or execute arbitrary code via vectors related to saving files during analysis.

CVSS v3
9.3
EG Score
9.3(medium)
EG Risk
72(Track*)
EG Risk 72/100SSVC: 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
Severity93% × 45%
Exploitation65% × 40%
Automatability30% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
4%
EPSS %ILE
90%
KEV
Not listed

Published

September 11, 2017

Last Modified

June 17, 2026

References (2)

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 8× in last 7d / 37× 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. 2026-07-24 14:13 UTCEPSS rescore
  2. 2026-07-23 14:14 UTCEPSS rescore
  3. 2026-07-23 01:18 UTCEG score recompute
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  63. 2026-05-22 10:00 UTCEG score recompute
  64. 2026-05-22 10:00 UTCGHSA enrichment
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Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-34334✓ verified
    First seen Aug 14, 2014

    Oracle VM VirtualBox 4.3.6 - 3D Acceleration Virtual Machine Escape (Metasploit)

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2015-4523?
CVE-2015-4523 is a critical vulnerability published on September 11, 2017. Blue Coat Malware Analysis Appliance (MAA) before 4.2.5 and Malware Analyzer G2 allow remote attackers to bypass a virtual machine protection mechanism and consequently write to arbitrary files, cause a denial of service (host reboot or reset to factory defaults), or execute arbitrary code via…
When was CVE-2015-4523 disclosed?
CVE-2015-4523 was first published in the National Vulnerability Database on September 11, 2017, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2015-4523 actively exploited?
CVE-2015-4523 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 4% probability of exploitation in the next 30 days, which ranks it in the top 9.9% of all scored CVEs.
What is the CVSS score of CVE-2015-4523?
CVE-2015-4523 has a CVSS v3 base score of 9.3 (NVD).
How do I remediate CVE-2015-4523?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2015-4523, 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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