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Exploited vulnerability · CISA KEV

Is CVE-2025-22226 exploited? Yes: in CISA KEV since 4 Mar 2025

Gociux · VMware ESXi, Workstation, and Fusion · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2025-22226, VMware ESXi, Workstation, and Fusion Information Disclosure Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 4 Mar 2025, the day it was published. It affects VMware ESXi, Workstation, and Fusion. If you run it, CISA's required action is: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

exploitedYesCISA KEV · 4 Mar 2025
ransomwareNot knownno confirmed use
EPSSbelow top 10%lower predicted activity right now (it is still confirmed exploited)
severity7.1CVSS 3.1 · high
US federal due25 Mar 2025BOD 22-01 deadline

What it is

VMware ESXi, Workstation, and Fusion contain an information disclosure vulnerability due to an out-of-bounds read in HGFS. Successful exploitation allows an attacker with administrative privileges to a virtual machine to leak memory from the vmx process.

VendorVMware (26 exploited CVEs in KEV)
ProductESXi, Workstation, and Fusion
VulnerabilityVMware ESXi, Workstation, and Fusion Information Disclosure Vulnerability
WeaknessCWE-125
Published4 Mar 2025
Added to KEV4 Mar 2025
Reported by (CNA)vmware

What to do

  1. Check whether you run it. Look for ESXi, Workstation, and Fusion in your asset inventory, including appliances and cloud images. Stack check lists every exploited VMware CVE at once.
  2. Apply the fix. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
  3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 4 Mar 2025.
  4. Get told next time. Email alerts when CISA adds a CVE for VMware.

References

Questions

Is CVE-2025-22226 being exploited?

Yes. CISA added CVE-2025-22226 to the Known Exploited Vulnerabilities catalog on 4 Mar 2025, which means there is reliable evidence of exploitation in the wild.

Is CVE-2025-22226 used in ransomware attacks?

CISA does not list known ransomware use for it. That can change, and exploitation alone is reason to fix it first.

How do I fix CVE-2025-22226?

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. Check VMware's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected ESXi, Workstation, and Fusion and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in March 2025 · VMware scorecard · act-now radar.

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