7-Zip is a popular cross-platform open source program to pack files and to unpack archives. It is a lightweight alternative to heavier archiving programs and the built-in Windows functionality, that is significantly slower in all benchmarks.
7-Zip 25.00 is now available. You can download the latest version from the official project website or from its Sourceforge repository. As always, just install the new version over the other to upgrade the installation to the latest version.
Tip: check the installed version by starting 7z-Zip on your system and selecting Help > About 7-Zip from the menu at the top.
This is the first release of 2025. The changelog lists several performance improvements for various supported tasks.
Here is the overview:
- The bzip2 compression speed was increased by 15-40%
- The deflate (zip/gz) compression speed was increased by 1-3%.
The Windows version of 7-Zip supports more than 64 CPU threads now furthermore for “compression
to zip/7z/xz archives and for the 7-Zip benchmark”. This could improve the performance on Windows systems.
Apart from the mentioned performance improvements, the changelog lists that “some vulnerabilities” were fixed in the latest version. The changelog does not provide any details on those vulnerabilities. Since it is unclear how severe the fixed vulnerabilities are, it is recommended to upgrade to the new version of 7-Zip immediately to protect your system from potential attacks.
Will components of other archiving programs need to be updated as well? I ask because vulnerabilities is mentioned.
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Example: “C:\Program Files\WinRAR\7zxa.dll”
Could be, I do not have any information about the vulnerabilities though.
Apparently the new version is being flagged as a virus by M$.
https://sourceforge.net/p/sevenzip/discussion/45797/thread/0eb5de7b25/