Patch now. It under exploitation confirmed by CISA and has a working public exploit.
ssvc Actcvss 8.8epss 77%
from disclosure to weapon6 days
Published on NVDOct 9
1st PoC+6d
metasploitOct 8
CISA KEV+3067d
exploitation probability
77%top 1% of all CVEs
observed exploitation
yesCISA + VulnCheck
1 public exploit(s)
Action required by CISAfederal deadline: 2022-03-24
Apply updates per vendor instructions.
In short
Internet Explorer has a bug where it tries to use memory that has already been freed, allowing attackers to run malicious code or crash the browser through specially crafted JavaScript. This vulnerability was actively exploited in real-world attacks in 2013.
Technical detail
Use-after-free vulnerability in mshtml.dll's CDisplayPointer class exploitable via crafted JavaScript leveraging the onpropertychange event handler; affects IE 6–11 and enables arbitrary code execution or denial of service through memory corruption without requiring user interaction beyond visiting a malicious webpage.
Summary generated and translated by AI from the official description.
Use-after-free vulnerability in the CDisplayPointer class in mshtml.dll in Microsoft Internet Explorer 6 through 11 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via crafted JavaScript code that uses the onpropertychange event handler, as exploited in the wild in September and October 2013, aka "Internet Explorer Memory Corruption Vulnerability."