Exploit / PoCcritical
Russia-linked APT28 exploited MSHTML zero-day CVE-2026
Vulnerabilities mentioned
All| CVE | Vulnerability | CVSS | EPSS | Signals | Published |
|---|---|---|---|---|---|
| CVE-2026-21513 | MSHTML Security Feature Bypass in Windows Exploited in the Wild (CVE-2026-21513) | 8.8 | 16% | KEV | KEV |
Indicators of compromise
auto-extracted · verify before use · export allAll| Type | Indicator | Context |
|---|---|---|
| domain | wellnesscaremed.com | r the standard LNK structure. When executed, it connects to wellnesscaremed[.]com , a domain attributed to APT28 and widely used in the cam |
From the original article
2 min read at securityaffairs.com
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.
By @securityaffairs · securityaffairs.com
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