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.

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

EPSS: 0.006 (46.8th percentile) — read the EPSS interpretation.

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.

Affected products

7-zip
Ipavlov 7-zip — versions < 25.0.0

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Third Party Advisory)
security-advisories@github.com (Exploit, Mailing List, x_refsource_MISC)
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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.