Buffer overflow in 7-Zip
CVE-2025-53816
7-Zip is a file archiver with a high compression ratio. Zeroes written outside heap buffer in RAR5 handler may lead to memory corruption and denial of service in versions of 7-Zip prior to 25.0.0. Version 25.0.0 contains a fix for the issue.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.007 (49.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 49.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.007 · change: +0.000
Affected products
- 7-Zip
- Ipavlov 7-Zip — versions < 25.0.0
Weakness classification (CWE)
References
- securitylab.github.com/advisories/GHSL-2025-058_7-Zip/ (Exploit, Third Party Advisory)
- www.openwall.com/lists/oss-security/2025/07/18/1 (Exploit, Mailing List)
- af854a3a-2127-422b-91ae-364da2661108
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2025-53816?
- CVE-2025-53816 is a high-severity vulnerability in 7-Zip, classified under Heap-based Buffer Overflow. CVSS score: 7.5/10. Published 2025-07-17.
- How severe is CVE-2025-53816?
- High severity. CVSS v3 base score is 7.5 out of 10.