Vulnerabilityhigh
APT28 Uses Microsoft Office CVE-2026-21509 in Espionage
Vulnerabilities mentioned
All| CVE | Vulnerability | CVSS | EPSS | Signals | Published |
|---|---|---|---|---|---|
| CVE-2026-21509 | Local Security Feature Bypass in Microsoft Office Under Active Exploitation | 7.8 | 71% | KEV | KEV |
Indicators of compromise
auto-extracted · verify before use · export allAll| Type | Indicator | Context |
|---|---|---|
| domain | filen.io | n said . "The threat actors abuse legitimate cloud storage (filen[.]io) as command-and-control (C2) infrastructure, blending mal |
From the original article
4 min read at thehackernews.com
The Russia-linked state-sponsored threat actor known as APT28 (aka UAC-0001) has been attributed to attacks exploiting a newly disclosed security flaw in Microsoft Office as part of a campaign codenamed Operation Neusploit .
By @TheHackersNews · thehackernews.com
A short excerpt; the article and its images belong to the publisher. Summary, key facts and assessment above are AI-written from the article and can be wrong.