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CVE-2025-22225: VMware ESXi Arbitrary Write Vulnerability

criticalknown exploitedCVE-2025-22225
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
VMware ESXi contains an arbitrary write vulnerability. Successful exploitation allows an attacker with privileges within the VMX process to trigger an arbitrary kernel write leading to an escape of the sandbox.

CSIRTS triage

vendor: VMwareproduct: ESXiOther
What
An arbitrary write vulnerability allows an attacker to trigger an arbitrary kernel write leading to a sandbox escape.
Who is affected
Users with privileges within the VMX process on VMware ESXi.
Urgency
Remediation is critical as the vulnerability is actively exploited and poses a severe risk.
Action
Install the latest patches from VMware to mitigate this issue.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2025-03-04
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2025-22225

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2025-22225coverage & exploitation statusNVD · CVE.org

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