MSHTML

Pierluigi Paganini March 02, 2026
Russia-linked APT28 exploited MSHTML zero-day CVE-2026-21513 before patch

Russia-linked APT28 reportedly exploited MSHTML zero-day CVE-2026-21513 before Microsoft patched it, a high-severity bypass flaw. Akamai reports that Russia-linked APT28 may have exploited CVE-2026-21513 CVSS score of 8.8), a high-severity MSHTML vulnerability (CVSS 8.8), before Microsoft patched it in February 2026. The vulnerability is an Internet Explorer security control bypass that can lead to code […]

Pierluigi Paganini November 25, 2021
Iranian threat actors exploit MS MSHTML bug to steal Google and Instagram credentials

An Iranian threat actor is stealing Google and Instagram credentials of Farsi-speaking targets by exploiting a Microsoft MSHTML bug. Researchers from SafeBreach Labs have identified a new Iranian threat actor that is exploiting a Microsoft MSHTML Remote Code Execution (RCE) vulnerability in attacks targeting Farsi-speaking victims. The exploit is used to install a PowerShell stealer, […]

Pierluigi Paganini September 16, 2021
Microsoft warns of attacks exploiting recently patched Windows MSHTML CVE-2021-40444 bug

Microsoft revealed that multiple threat actors are exploiting the recently patched Windows MSHTML remote code execution security flaw (CVE-2021-40444). Microsoft warns of multiple threat actors, including ransomware operators, that are exploiting the recently patched Windows MSHTML remote code execution security flaw (CVE-2021-40444) in attacks against organizations. The IT giant says that threat actors started targeting […]