CVE-2025-53816

Published Jul 17, 2025

Last updated a month ago

7-Zip

Overview

AI description

Automated description summarized from trusted sources.

CVE-2025-53816 is a vulnerability affecting 7-Zip, a file archiving tool. Specifically, it's a heap buffer overflow found in the RAR5 decoder component. This flaw can be triggered when 7-Zip attempts to process specially crafted RAR5 archive files. The vulnerability stems from a miscalculation in memory operations during the recovery of corrupted archive items, leading to a write of zero bytes beyond the allocated buffer. By exploiting this, an attacker can cause memory corruption and potentially crash the application or system, resulting in a denial-of-service condition. 7-Zip version 25.0.0 addresses this vulnerability.

Description: 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.
Source: security-advisories@github.com
NVD status: Analyzed
Products: 7-zip

Risk scores

CVSS 4.0

Type: Secondary
Base score: 5.5
Impact score: -
Exploitability score: -
Vector string: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Severity: MEDIUM

CVSS 3.1

Type: Primary
Base score: 7.5
Impact score: 3.6
Exploitability score: 3.9
Vector string: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Severity: HIGH

Weaknesses

security-advisories@github.com: CWE-122

Hype score: Not currently trending

Configurations

[
  {
    "nodes": [
      {
        "negate": false,
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:7-zip:7-zip:*:*:*:*:*:*:*:*",
            "vulnerable": true,
            "matchCriteriaId": "309F5F49-CD93-4F51-B45D-F8E29B5C14E3",
            "versionEndExcluding": "25.00"
          }
        ],
        "operator": "OR"
      }
    ]
  }
]

References

Sources include official advisories and independent security research.