CVE-2026-3665 MEDIUM

CVE-2026-3665: xlnt-community xlnt XLSX File xlsx_consumer.cpp read_office_document null pointer dereference

Vendor Xlnt-Community
Product xlnt
Weakness CWE-476
Published March 7, 2026
Last update March 11, 2026

CVSS base score

4.8/10
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality
Integrity

CVSS vector

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

What the vulnerability does

01Description

A vulnerability was identified in xlnt-community xlnt up to 1.6.1. The affected element is the function xlnt::detail::xlsx_consumer::read_office_document of the file source/detail/serialization/xlsx_consumer.cpp of the component XLSX File Parser. The manipulation leads to null pointer dereference. The attack must be carried out locally. The exploit is publicly available and might be used.

Key dates

02Disclosure timeline

March 7, 2026 CVE published
March 11, 2026 Record updated