: In late 2025, authorities like NHS England Digital warned of vulnerabilities (CVE-2025-11001) that could allow attackers to execute remote code through crafted ZIP files [4].
: It supports AES-256 bit encryption , allowing users to protect the contents with a password [9, 21]. Security Warnings (2025-2026) EZDP.7z
: 7z can treat multiple files as a single stream of data, which significantly increases compression efficiency for similar files [32]. : In late 2025, authorities like NHS England
The 7z format was introduced in by Igor Pavlov , a developer in Russia who released it as a free, open-source alternative to commercial software like WinZip or WinRAR [7, 16, 17]. Unlike its competitors, 7-Zip was built with an open architecture, meaning anyone can use or modify its code [9, 12]. Key Features of 7z Files The 7z format was introduced in by Igor
: The format often provides 30–50% better compression than standard ZIP files [12, 18].
Recent reports have highlighted security risks associated with 7-Zip software and archives:
: It primarily uses the Lempel-Ziv-Markov chain algorithm (LZMA), which is highly effective at reducing file sizes [12, 23].