CVE-2021-34484

Microsoft Windows: User Profile Service Privilege Escalation

As of , CVE-2021-34484 in Microsoft Windows is on CISA's list of exploited vulnerabilities: CISA listed it on . Our patch-first group: Patch soon.

Exploited
Yes: CISA listed it on 31 March 2022
US federal deadline
21 April 202221 days after CISA listed it. US federal civilian agencies must fix it by then.
Used in ransomware campaigns
Not known to CISA
EPSS score
0.22Higher than 97% of the CVEs EPSS scores. EPSS estimates the chance of exploitation activity in the next 30 days.
EPSS when listed
0.01 on 31 March 2022EPSS on the day CISA listed it.
Public exploit
None foundNeither Metasploit nor Exploit-DB lists one.
Fix
No vendor link in CISA's entry

What CISA says to do

Apply updates per vendor instructions.

CISA's required action

What the flaw is

Microsoft Windows User Profile Service contains an unspecified vulnerability that allows for privilege escalation.

CISA's description

Windows User Profile Service Elevation of Privilege Vulnerability

The CVE record's description, from microsoft

CVE published
12 August 2021
Assigned by
microsoft
CVSS
7.8 High (CVSS 3.1, from the CNA)
CWE-269
Improper Privilege Management
CISA SSVC, exploitation
active
CISA SSVC, automatable
no
CISA SSVC, technical impact
total

Timeline

  1. The CVE record was published.
  2. CISA added it to its list of exploited vulnerabilities.
  3. The US federal deadline to fix it.

Windows: other exploited entries

VulnerabilityProductOur groupListedDeadlineEPSS
CVE-2025-60710Link FollowingMicrosoft WindowsPatch nowRansomware use, listed within a year0.05
CVE-2008-4250Buffer OverflowMicrosoft WindowsPatch this weekMetasploit module; EPSS 0.99; verified Exploit-DB entry0.99
CVE-2008-0015Video ActiveX Control Remote Code ExecutionMicrosoft WindowsPatch this weekMetasploit module; EPSS 0.77; verified Exploit-DB entry0.77
CVE-2013-3918Out-of-Bounds WriteMicrosoft WindowsPatch this weekMetasploit module; EPSS 0.74; verified Exploit-DB entry0.74
CVE-2010-2568Remote Code ExecutionMicrosoft WindowsPatch this weekMetasploit module; EPSS 0.91; verified Exploit-DB entry0.91
CVE-2015-0016TS WebProxy Directory TraversalMicrosoft WindowsPatch this weekMetasploit module; EPSS 0.76; verified Exploit-DB entry0.76
CVE-2015-2426Adobe Type Manager Library Remote Code ExecutionMicrosoft WindowsPatch this weekMetasploit module; EPSS 0.87; verified Exploit-DB entry0.87
CVE-2014-6332Object Linking & Embedding (OLE) Automation Array Remote Code ExecutionMicrosoft WindowsPatch this weekMetasploit module; EPSS 0.95; verified Exploit-DB entry0.95
CVE-2017-0146SMB Remote Code ExecutionMicrosoft WindowsPatch this weekRansomware use; Metasploit module; EPSS 0.90; verified Exploit-DB entry0.90
CVE-2014-4114Object Linking & Embedding (OLE) Remote Code ExecutionMicrosoft WindowsPatch this weekMetasploit module; EPSS 0.82; verified Exploit-DB entry0.82

All 174 entries for Windows

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