Microsoft Edge and Internet Explorer Type Confusion Vulnerability
Microsoft · Edge and Internet Explorer
CVSS 8.1
EPSS 80%
3 public exploits
Fix deadline passed 18 April 2022
What it is
Microsoft Edge and Internet Explorer have a type confusion vulnerability in mshtml.dll, which allows remote code execution.
Why we say that
- EPSS puts exploitation in the next 30 days at 80%
- 3 public exploits published
- CISA's federal remediation deadline (2022-04-18) has passed
- Listed in the CISA Known Exploited Vulnerabilities catalogue
Every line above comes from a named public source. Where the evidence is thin, we say so rather than inventing confidence — see methodology.
What to do
Apply updates per vendor instructions.
Public exploit code
Indexed from Exploit-DB. Presence of code raises urgency; absence does not mean safety.
What it costs when this goes wrong
This is where UK enforcement meets the vulnerability record. Where an unfixed vulnerability leads to a breach, the ICO treats it as a security failure under UK GDPR. Recent cases:
- The Electoral Commission Reprimand issued to the Electoral Commission in respect of Articles 5(1)(f) and 32(1)(b). Between 24 August 2021 and 27 October 20…
- Gain Capital UK Limited Gain Capital UK have been issued a Reprimand in respect of Articles 32 (2) and 32 (1) (b). An unauthorised third party leveraged a…
- Chartered Institute for Securities & Investment An unauthorised third party exploited a known vulnerability in the Sitefinity software to leverage a bruteforce attack to upload a…