Is CVE-2026-3463 actively exploited?

No active exploitation of CVE-2026-3463 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-3463 be exploited remotely?

No. CVE-2026-3463 requires local access to exploit.

What is the CVSS score of CVE-2026-3463?

CVE-2026-3463 has a CVSS score of 3.3 (LOW).

HOME VULNERABILITIESCVE-2026-3463

LOW

CVE-2026-3463

CWE-119Published: March 3, 2026· Updated: Mar 3, 2026

3.3

CVSS v3.1

EPSS:0.01%probability of exploitation in 30 daysPercentile:2.0th

Official Description

A weakness has been identified in xlnt-community xlnt up to 1.6.1. Impacted is the function xlnt::detail::binary_writer::append of the file source/detail/binary.hpp of the component Compound Document Parser. This manipulation causes heap-based buffer overflow. The attack can only be executed locally. The exploit has been made available to the public and could be used for attacks. Patch name: 147. It is suggested to install a patch to address this issue.

NVD Source

Technical Analysis

CVE-2026-3463 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

From a weakness classification perspective (CWE-119): Buffer overflow vulnerabilities can lead to arbitrary code execution or denial of service by corrupting adjacent memory.