CVE-2021-1722
published 2021-02-25CVE-2021-1722: Windows Fax Service Remote Code Execution Vulnerability
PriorityP259critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
2.28%
81.3th percentile
Windows Fax Service Remote Code Execution Vulnerability
Affected
46 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | windows_10 | — | — |
| microsoft | windows_10 | — | — |
| microsoft | windows_10 | — | — |
| microsoft | windows_10 | — | — |
| microsoft | windows_10 | — | — |
| microsoft | windows_10 | — | — |
| microsoft | windows_10_version_1507 | >= 10.0.0 < publication | publication |
| microsoft | windows_10_version_1607 | >= 10.0.0 < publication | publication |
| microsoft | windows_10_version_1803 | >= 10.0.0 < publication | publication |
| microsoft | windows_10_version_1809 | >= 10.0.0 < publication | publication |
| microsoft | windows_10_version_1909 | >= 10.0.0 < publication | publication |
| microsoft | windows_10_version_2004 | >= 10.0.0 < publication | publication |
| microsoft | windows_10_version_20h2 | >= 10.0.0 < publication | publication |
| microsoft | windows_7 | >= 6.1.0 < publication | publication |
| microsoft | windows_7_service_pack_1 | >= 6.1.0 < publication | publication |
| microsoft | windows_8.1 | >= 6.3.0 < publication | publication |
| microsoft | windows_server_2008 | — | — |
| microsoft | windows_server_2008_r2_service_pack_1 | >= 6.0.0 < publication | publication |
| microsoft | windows_server_2008_r2_service_pack_1 | >= 6.1.0 < publication | publication |
| microsoft | windows_server_2008_service_pack_2 | >= 6.0.0 < publication | publication |
| microsoft | windows_server_2012 | — | — |
| microsoft | windows_server_2012 | >= 6.2.0 < publication | publication |
| microsoft | windows_server_2012_r2 | >= 6.3.0 < publication | publication |
| microsoft | windows_server_2016 | — | — |
| microsoft | windows_server_2016 | — | — |
Detection & IOCsextracted from sources · hover to see the quote
- →Check if the Fax service is running on Windows systems — presence and 'Running' status indicates exploitability ↗
- →For Windows 11 and Windows 10, the Fax service is not installed by default; only systems with Windows Fax and Scan feature enabled AND Fax service running are vulnerable ↗
- →Enumerate the Fax service via services.msc or equivalent (e.g., sc query Fax, Get-Service Fax) to identify exposed hosts ↗
- ·No public exploit exists at time of advisory; Microsoft rates exploitation as 'Less Likely' for both latest and older software releases ↗
- ·Systems without the Fax service running are not vulnerable at the time, but remain at risk if the service is later started — patching is still recommended ↗
CVSS provenance
nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvdv2.07.5HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P
vendor_msrc8.1HIGH
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Microsoft
Windows Fax Service Remote Code Execution Vulnerability
vendor_msrc·2021-02-09·CVSS 8.1
CVE-2021-1722 [HIGH] Windows Fax Service Remote Code Execution Vulnerability
Windows Fax Service Remote Code Execution Vulnerability
FAQ: In what scenarios is my computer vulnerable?
For Windows 11 and Windows 10 the FAX service is not installed by default. For the vulnerability to be exploitable, the Windows Fax and Scan feature needs to be enabled, and the Fax service needs to be running. Systems that do not have the Fax service running are not vulnerable.
How can I verify whether the Fax service is running?
Hold the Windows key and press R on your keyboard. This will open the Run dialog.
Type services.msc and press Enter to open the Services window.
Scroll through the list and locate the Fax service.
If the Fax service is not listed, Windows Fax and Scan is not enabled and the system is not vulnerable.
If the Fax service is listed but the status is not Runnin
GHSA
GHSA-9pqr-g6m6-mhm5: Windows Fax Service Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-24077
ghsa_unreviewed·2022-05-24·CVSS 9.8
CVE-2021-1722 [CRITICAL] GHSA-9pqr-g6m6-mhm5: Windows Fax Service Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-24077
Windows Fax Service Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-24077.
GHSA
GHSA-mpm7-qfrh-w576: Windows Fax Service Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-1722
ghsa_unreviewed·2022-05-24·CVSS 8.1
CVE-2021-24077 [HIGH] GHSA-mpm7-qfrh-w576: Windows Fax Service Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-1722
Windows Fax Service Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-1722.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2021-02-25
Published