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Vulnerability record · CVE-2018-5996 · published 31 January 2018

CVE-2018-5996: 7-zip memory buffer overflow vulnerability

7 Zip · 7 Zip

Insufficient exception handling in the method NCompress::NRar3::CDecoder::Code of 7-Zip before 18.00 and p7zip can lead to multiple memory corruptions within the PPMd code, allows remote attackers to cause a denial of service (segmentation fault) or execute arbitrary code via a crafted RAR archive.

7.8 CVSS 3.0 High EPSS 2.9% · top 13.7% CWE-119 · Memory buffer overflow
7.8CVSS 3.0 base score, v2 6.8
2.9%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
8References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

Insufficient exception handling in the method NCompress::NRar3::CDecoder::Code of 7-Zip before 18.00 and p7zip can lead to multiple memory corruptions within the PPMd code, allows remote attackers to cause a denial of service (segmentation fault) or execute arbitrary code via a crafted RAR archive.

CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securitytracker.com/id/1040831
https://0patch.blogspot.si/2018/02/two-interesting-micropatches-for-7-zip.html
https://github.com/p7zip-project/p7zip/issues/32
https://github.com/p7zip-project/p7zip/issues/8
https://landave.io/2018/01/7-zip-multiple-memory-corruptions-via-rar-and-zip/ ExploitTechnical DescriptionThird Party Advisory
http://www.securitytracker.com/id/1040831
https://0patch.blogspot.si/2018/02/two-interesting-micropatches-for-7-zip.html
https://landave.io/2018/01/7-zip-multiple-memory-corruptions-via-rar-and-zip/ ExploitTechnical DescriptionThird Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2018-5996), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.