CVE-2022-26937
CriticalWindows Network File System Remote Code Execution Vulnerability
Published May 11, 2022 · Updated Jan 2, 2025
Key Facts
Patch immediately- CVE-2022-26937 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Windows Server 2008 (Microsoft), Windows Server 2012 (Microsoft), Windows Server 2016 (Microsoft) and 13 more products.
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 76% probability of exploitation in the next 30 days.
- Fixed versions are available, including Windows Server 2008 Service Pack 2 6.0.6003.21481, Windows Server 2008 R2 Service Pack 1 6.1.7601.25954, Windows Server 2008 R2 Service Pack 1 (Server Core installation) 6.1.7601.25954.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
76%
Higher than 99.5% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
None known
Get the full CVE-2022-26937 brief as a PDF
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Description
Windows Network File System Remote Code Execution Vulnerability
Affected Products
25 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Windows Server 2008Microsoft | r2-sp1, sp2 | n/a |
| Windows Server 2012Microsoft | r2, >= 6.2.9200.0 | 6.2.9200.23714 |
| Windows Server 2016Microsoft | >= 10.0.14393.0 | 10.0.14393.5125 |
| Windows Server 2019Microsoft | >= 10.0.17763.0 | 10.0.17763.2928 |
| Windows Server 2022Microsoft | >= 10.0.20348.0 | 10.0.20348.707 |
Patched Releases
Windows Server 2008 Service Pack 2
6.0.6003.21481
Windows Server 2008 R2 Service Pack 1
6.1.7601.25954
Windows Server 2008 R2 Service Pack 1 (Server Core installation)
6.1.7601.25954
Windows Server 2008 Service Pack 2 (Server Core installation)
6.0.6003.21481
Windows Server 2012
6.2.9200.23714
Windows Server 2012 (Server Core installation)
6.2.9200.23714
Windows Server 2012 R2
6.3.9600.20371
Windows Server 2012 R2 (Server Core installation)
6.3.9600.20371
Windows Server 2016
10.0.14393.5125
Windows Server 2016 (Server Core installation)
10.0.14393.5125
Windows Server 2019
10.0.17763.2928
Windows Server 2019 (Server Core installation)
10.0.17763.2928
Windows Server 2022
10.0.20348.707
Windows Server version 20H2
10.0.19042.1706
Timeline
Publicly disclosed
May 11, 2022
Last updated
Jan 2, 2025
References
- advisoryhttp://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-26923
- advisoryhttp://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-29102
- advisoryhttp://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-29113
- advisoryhttps://blog.qualys.com/vulnerabilities-threat-research/2022/05/10/may-2022-patch-tuesday-microsoft-releases-75-vulnerabilities-with-8-critical
- advisoryhttps://docs.microsoft.com/en-us/deployedge/microsoft-edge-relnotes-security
FAQ
Common Questions.
Windows Network File System Remote Code Execution Vulnerability
Affected: Windows Server 2008 (Microsoft) versions r2-sp1, sp2; Windows Server 2012 (Microsoft) versions r2, >= 6.2.9200.0; Windows Server 2016 (Microsoft) versions >= 10.0.14393.0, among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including Windows Server 2008 Service Pack 2 6.0.6003.21481, Windows Server 2008 R2 Service Pack 1 6.1.7601.25954, Windows Server 2008 R2 Service Pack 1 (Server Core installation) 6.1.7601.25954.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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