CVE-2026-47876
VMXNET3 out-of-bounds write vulnerability
No known exploitation. EPSS puts it in the 9th percentile. Fixed versions are out.
No public exploit knownFix4 products3 fixed builds listed below
e.g. OID 1.3.6.1.4.1.25623.1.0.139064
What to do
Find your product and version, then upgrade to the build on the right.
- VMware Cloud FoundationAffected: 9.1.x.xUpgrade to: not statedAffected: 9.0.x.xUpgrade to: not statedAffected: 5.xUpgrade to: not statedStated by: CVE record
- VMware vSphere FoundationAffected: 9.1.x.xUpgrade to: not statedAffected: 9.0.x.xUpgrade to: not statedStated by: CVE record
- VMware ESXAffected: ≥ 9.1.x.x, < ESXi-9.1.0.0200-25557999Upgrade to: ESXi-9.1.0.0200-25557999Affected: ≥ 9.0.x.x, < ESXi-9.0.2.0100-25595025Upgrade to: ESXi-9.0.2.0100-25595025Affected: ≥ 8.0, < ESXi80U3k-25595708Upgrade to: ESXi80U3k-25595708Stated by: CVE record
- VMware Telco Cloud PlatformAffected: 5.1.xUpgrade to: not statedAffected: 5.0.xUpgrade to: not statedStated by: CVE record
Versions as the sources state them. Full version matrix after sign-in
Coverage timeline
3 publishersVendor patch released
Sourced from public security reporting — each date is when it was published, not when it happened.
What it is
From the CVE record
VMware ESX contains an out-of-bounds write vulnerability in the VMXNET3 virtual network adapter. A malicious actor with local administrative privileges on a virtual machine with VMXNET3 virtual network adapter may exploit this issue to execute code on the host. Non VMXNET3 virtual adapters are not affected by this issue.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
0.2% chance of exploitation activity in the next 30 days, which ranks it in the 9th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
6 events over 12 days, from the signal feeds we watch.
- Analysis publishedBroadcom's VMSA-2026-0006 Patches Three Critical VMware Flaws — vCenter Has Failed This Exact Way Before
- OpenVAS check added
- Publishedweakness classified, att&ck mapped, record updated
Affected products
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Scored 9.3 by NVD.
How it is reached
- Attack Vector LocalRequires local access to the vulnerable system (e.g. local login, malicious file)
- Attack Complexity LowNo special conditions — the attack can be reliably reproduced
- Privileges Required NoneNo authentication required — anyone can exploit this
- User Interaction NoneNo user interaction needed — fully automated exploitation
Scope
- Scope ChangedThe exploit can affect other components (e.g. sandbox escape, host compromise from VM)
Impact if exploited
- Confidentiality HighTotal information disclosure — all data in the component is compromised
- Integrity HighTotal loss of integrity — attacker can modify any data in the component
- Availability HighTotal denial of service — the component is completely unavailable
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
- Initial AccessT1190Exploit Public-Facing Applicationhigh confidence
- Privilege EscalationT1068Exploitation for Privilege Escalationhigh confidence
Sources
References in the record
Analysis on the cve.tools blog
In the news
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