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CISA KEV · ACTIVELY EXPLOITED
HIGH severity

CVE-2025-22226

HIGH

CVE-2025-22226 is a high-severity (CVSS 7.1) Out-of-bounds Read vulnerability. It is in CISA's Known Exploited Vulnerabilities catalog (added 2025-03-04) — treat it as actively exploited and patch now. No vendor fix is recorded yet; mitigation options are listed below.

VMware ESXi, Workstation, and Fusion contain an information disclosure vulnerability due to an out-of-bounds read in HGFS. A malicious actor with administrative privileges to a virtual…

Published
Updated
Affected
6 products
Patched
See advisory
Exploits
None indexed
Exploitation data as of Oct 23, 2026 · OSV.dev, NVD, CISA KEV, FIRST.org (EPSS)

Exploitation Status

Actively exploited in the wild

  • Confirmed by CISA's Known Exploited Vulnerabilities catalog on 2025-03-04. Federal agencies were required to remediate by 2025-03-25.

Exploitation and automatability from CISA (KEV catalog and SSVC triage) for CVE-2025-22226.

EPSS Exploitation Probability

via FIRST.org ↗
1.8%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs78th percentile — riskier than 78% of all scored CVEsHighest risk
0.14%2.87%5.61%8.34%6.8%1.8%Apr 26Aug 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

CVE-2025-22226 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 395,249 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Description

VMware ESXi, Workstation, and Fusion contain an information disclosure vulnerability due to an out-of-bounds read in HGFS. A malicious actor with administrative privileges to a virtual machine may be able to exploit this issue to leak memory from the vmx process.

Affected Products

6 products · 57 configurations
Application
cloud foundationvmware
all
OS
esxivmware
2 versions
7.08.0
Application
fusionvmware
≥ 13.0.0 && < 13.6.3
range
Application
telco cloud infrastructurevmware
4 versions
2.22.52.73.0
Application
telco cloud platformvmware
7 versions
2.02.52.73.04.04.0.15.0
Application
workstationvmware
≥ 17.0 && < 17.6.3
range

Detection & mitigation playbook

Vulnerability

  1. Detect

    Identify every host running the affected component and compare the installed build against the fixed version below — for source-built or distro-packaged software the version string, not a lockfile, is the source of truth (`dpkg -l`, `rpm -q`, or the binary's own `--version`).

  2. Remediation status

    No fixed release is recorded for CVE-2025-22226 yet. Track the upstream advisory, and apply the exposure-reduction steps below in the meantime.

  3. Mitigate without a patch

    Constrain what reaches the vulnerable code: limit the size and shape of untrusted input, isolate the affected component in a sandboxed or least-privileged process, and enable the platform's memory-safety mitigations (ASLR, stack protector, hardened allocator) so an out-of-bounds access is more likely to fail closed than to be exploitable.

Frequently Asked Questions

VMware ESXi, Workstation, and Fusion contain an information disclosure vulnerability due to an out-of-bounds read in HGFS. A malicious actor with administrative privileges to a virtual machine may be able to exploit this issue to leak memory from the vmx process.
O3 Security · Impact-Aware SCA

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CVE-2025-22226: Memory Corruption (High 7.1, KEV)