CVE-2020-1040
Actively exploited. CVE-2020-1040 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.
Microsoft Hyper-V RemoteFX vGPU contains an improper input validation vulnerability due to the host server failing to properly validate input from an authenticated user on a guest operating system. Successful exploitation allows for remote code execution on the host operating system.
CSIRTS triage
- What
- The vulnerability allows for remote code execution on the host operating system.
- Who is affected
- Deployments of Microsoft Hyper-V RemoteFX vGPU are affected.
- Urgency
- Remediation is urgent due to active exploitation and critical severity.
- Action
- Apply the latest security patch from Microsoft.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 93% of all EPSS-scored CVEs.
Advisory coverage (1)
- criticalexploitedCVE-2020-1040: Microsoft Hyper-V RemoteFX vGPU Remote Code Execution Vulnerabilitycisa-kev · 2021-11-03
External references
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