Actively exploited · Published Jul 14, 2020 · Assigned by microsoft

CVE-2020-1040

Critical 9.0 Exploited

In plain English

A critical-severity improper input validation in Windows Server from Microsoft. Attackers are actively exploiting it in the wild (listed by CISA on November 3, 2021). The chance it is exploited in the next 30 days is estimated at 7.6% (higher than 95% of all known vulnerabilities). Apply updates per vendor instructions.

Severity (CVSS 3.1)9.0Critical

Exploit odds (30 days)7.6%top 5.5% of all CVEs

Exploited in the wildYesCISA KEV since Nov 3, 2021

Attack toolingNoneno public tooling known

CISA guidance

Apply updates per vendor instructions.

Federal agencies must remediate by May 3, 2022.

Official description

A remote code execution vulnerability exists when Hyper-V RemoteFX vGPU on a host server fails to properly validate input from an authenticated user on a guest operating system, aka 'Hyper-V RemoteFX vGPU Remote Code Execution Vulnerability'. This CVE ID is unique from CVE-2020-1032, CVE-2020-1036, CVE-2020-1041, CVE-2020-1042, CVE-2020-1043.

Affected products (as reported)

Vendor	Product	Versions
Microsoft	Windows Server	20162016 (Core installation)2008 R2 for x64-based Systems Service Pack 12008 R2 for x64-based Systems Service Pack 1 (Core installation)20122012 (Core installation)2012 R22012 R2 (Core installation)

Weakness: CWE-20 · Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1040 x_refsource_MISC
https://nvidia.custhelp.com/app/answers/detail/a_id/5044 x_refsource_CONFIRM
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-1040 government-resource