CVE-2026-27711 MEDIUM

CVE-2026-27711: NanaZip UFS Archive Parser Memory Corruption via Unvalidated Directory Record Length

Vendor M2Team
Product NanaZip
Weakness CWE-125
Published February 25, 2026
Last update February 26, 2026
View on NVD All CVEs

CVSS base score

5.1/10
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction —
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

What the vulnerability does

01Description

NanaZip is an open source file archive. Starting in version 5.0.1252.0 and prior to versions 6.0.1638.0 and 6.5.1638.0, a memory corruption vulnerability in NanaZip’s UFS parser allows a crafted `.ufs/.ufs2/.img` file to trigger out-of-bounds memory access during archive open/listing. The bug is reachable via normal user file-open flow and can cause process crash, hang, and potentially exploitable heap corruption. Versions 6.0.1638.0 and 6.5.1638.0 fix the issue.

Key dates

02Disclosure timeline

February 25, 2026 CVE published
February 26, 2026 Record updated