⚠ Actively exploited in ransomware campaigns
This vulnerability is on the CISA Known Exploited Vulnerabilities list and has been used in known ransomware attacks. CISA required action: Apply updates per vendor instructions.. Due date: 2021-11-17.

CVE-2021-1675

CWE-285CWE-269 — Improper Privilege Management27 documents15 sources
Severity
7.8HIGH
EPSS
94.3%
top 0.05%
CISA KEV
KEVRansomware
Added 2021-11-03
Due 2021-11-17
Exploit
Exploited in wild
Active exploitation observed
Affected products
33
Microsoft Windows 10 Version 1507Microsoft Windows 10 Version 1607Microsoft Windows 10 Version 1809+30 more
Timeline
PublishedJun 8
KEV addedNov 3
KEV dueNov 17
Latest updateDec 6
CISA Required Action: Apply updates per vendor instructions.

Description

Windows Print Spooler Remote Code Execution Vulnerability

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HExploitability: 1.8 | Impact: 5.9

Affected Packages32 packages

▶NVDmicrosoft/windows< 10.0.19041.1052+3
▶CVEListV5microsoft/windows_76.1.0 — 6.1.7601.25632
▶CVEListV5microsoft/windows_8.16.3.0 — 6.3.9600.20045+1
▶NVDmicrosoft/windows_10_1507< 10.0.10240.18967
▶NVDmicrosoft/windows_10_1607< 10.0.14393.4467

Patches

Patch: portal.msrc.microsoft.com ↗Patch: portal.msrc.microsoft.com ↗

🔴Vulnerability Details

3
GHSA
GHSA-vwmm-qq95-vqhf: Windows Print Spooler Elevation of Privilege Vulnerability↗2022-05-24
▶
CVEList
Windows Print Spooler Remote Code Execution Vulnerability↗2021-06-08
▶
VulnCheck
Microsoft Windows Print Spooler Remote Code Execution Vulnerability↗2021
▶

🔍Detection Rules

1
Sigma
Suspicious Rejected SMB Guest Logon From IP↗
▶

📋Vendor Advisories

2
CISA
Microsoft Windows Print Spooler Remote Code Execution Vulnerability↗2021-11-03
▶
Microsoft
Windows Print Spooler Remote Code Execution Vulnerability↗2021-06-08
▶

🕵️Threat Intelligence

14
Unit42
Vice Society: Profiling a Persistent Threat to the Education Sector↗2022-12-06
▶
Talos
Vice Society leverages PrintNightmare in ransomware attacks↗2021-08-12
▶
Talos
Vice Society leverages PrintNightmare in ransomware attacks↗2021-08-12
▶
Unit42
Threat Brief: Windows Print Spooler RCE Vulnerability (CVE-2021-34527 AKA PrintNightmare)↗2021-07-14
▶
Sentinelone
PrintNightmare Vulnerability: Analysis and Mitigation↗2021-07-14
▶
CVE-2021-1675 (HIGH CVSS 7.8) | Windows Print Spooler Remote Code E | cvebase.io