CVE-2021-27085

Microsoft Internet Explorer: Remote Code Execution

As of , CVE-2021-27085 in Microsoft Internet Explorer is on CISA's list of exploited vulnerabilities: CISA listed it on . Our patch-first group: Patch soon.

Exploited
Yes: CISA listed it on 3 November 2021
US federal deadline
17 November 202114 days after CISA listed it. US federal civilian agencies must fix it by then.
Used in ransomware campaigns
Not known to CISA
EPSS score
0.05Higher than 92% of the CVEs EPSS scores. EPSS estimates the chance of exploitation activity in the next 30 days.
EPSS when listed
Not availableCISA listed it before 4 February 2022, where the EPSS files we read begin.
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 Internet Explorer contains an unspecified vulnerability that allows for remote code execution.

CISA's description

Internet Explorer Remote Code Execution Vulnerability

The CVE record's description, from microsoft

CVE published
11 March 2021
Assigned by
microsoft
CVSS
8.8 High (CVSS 3.1, from the CNA)
CISA SSVC, exploitation
active
CISA SSVC, automatable
no
CISA SSVC, technical impact
partial

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.

Internet Explorer: other exploited entries

VulnerabilityProductOur groupListedDeadlineEPSS
CVE-2010-0249Use-After-FreeMicrosoft Internet ExplorerPatch this weekMetasploit module; EPSS 0.92; verified Exploit-DB entry0.92
CVE-2010-0806Use-After-FreeMicrosoft Internet ExplorerPatch this weekMetasploit module; EPSS 0.82; verified Exploit-DB entry0.82
CVE-2010-3962Uninitialized Memory CorruptionMicrosoft Internet ExplorerPatch this weekMetasploit module; EPSS 0.97; verified Exploit-DB entry0.97
CVE-2013-3893Resource Management ErrorsMicrosoft Internet ExplorerPatch this weekMetasploit module; EPSS 0.88; verified Exploit-DB entry0.88
CVE-2012-4792Use-After-FreeMicrosoft Internet ExplorerPatch this weekMetasploit module; EPSS 0.79; verified Exploit-DB entry0.79
CVE-2013-3163Memory CorruptionMicrosoft Internet ExplorerPatch this weekMetasploit module; EPSS 0.71; verified Exploit-DB entry0.71
CVE-2012-4969Use-After-FreeMicrosoft Internet ExplorerPatch this weekMetasploit module; EPSS 0.80; verified Exploit-DB entry0.80
CVE-2014-0322Use-After-FreeMicrosoft Internet ExplorerPatch this weekMetasploit module; EPSS 0.85; verified Exploit-DB entry0.85
CVE-2013-2551Use-After-FreeMicrosoft Internet ExplorerPatch this weekRansomware use; Metasploit module; EPSS 0.74; verified Exploit-DB entry0.74
CVE-2013-1347Remote Code ExecutionMicrosoft Internet ExplorerPatch this weekMetasploit module; EPSS 0.78; verified Exploit-DB entry0.78

All 36 entries for Internet Explorer

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