0nb.7z

: NIST notes that this specific vulnerability can bypass the "Mark-of-the-Web" protection mechanism, which typically warns users when opening files downloaded from the internet.

: Attackers used compromised email accounts to send malicious archives. These attacks utilized homoglyph attacks , where visually similar characters are used to deceive users into opening malicious files.

: Security experts recommend updating 7-Zip to version 24.09 or later to patch this flaw. General 7z Security Context 0NB.7z

: Older community discussions, such as those on Reddit , have debated the cryptographic implementation in 7-Zip, though many reported "flaws" were later deemed low-risk or debunked by the developer.

On February 4, 2025, researchers at Trend Micro published a blog post detailing how Russian-linked threat actors exploited a zero-day vulnerability in 7-Zip, identified as . : NIST notes that this specific vulnerability can

Other security-focused blog posts have explored the broader risks associated with archiving tools:

: The vulnerability was used to deploy the SmokeLoader malware, which functions as a loader for further cyberespionage tools. : Security experts recommend updating 7-Zip to version 24

: The campaign primarily targeted governmental and civilian organizations in Ukraine as part of the Russo-Ukrainian conflict.