Is CVE-2026-33491 actively exploited?

No active exploitation of CVE-2026-33491 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-33491 be exploited remotely?

No. CVE-2026-33491 requires local access to exploit.

What is the CVSS score of CVE-2026-33491?

CVE-2026-33491 has a CVSS score of 7.8 (HIGH).

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HIGH

CVE-2026-33491

CWE-121Published: March 26, 2026· Updated: Mar 30, 2026

7.8

CVSS v3.1

EPSS:0.01%probability of exploitation in 30 daysPercentile:3.0th

Official Description

Zen C is a systems programming language that compiles to human-readable GNU C/C11. Prior to version 0.4.4, a stack-based buffer overflow vulnerability in the Zen C compiler allows attackers to cause a compiler crash or potentially execute arbitrary code by providing a specially crafted Zen C source file (`.zc`) with excessively long struct, function, or trait identifiers. Users are advised to update to Zen C version v0.4.4 or later to receive a patch.

NVD Source

Technical Analysis

CVE-2026-33491 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.8.