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

CVE-2026-33491 has a CVSS 3.1 base score of 7.8 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.0%.

CVE-2026-33491

EUVD-2026-16319 HIGH

Stack-based Buffer Overflow (CWE-121)

2026-03-26 GitHub_M

RCE Buffer Overflow Stack Overflow

7.8

CVSS 3.1

CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Updated

Apr 16, 2026 - 06:13 EUVD-patch-fix

executive_summary

Re-analysis Queued

Apr 16, 2026 - 05:29 backfill_euvd_patch

patch_released

Patch available

Apr 16, 2026 - 05:29 EUVD

0.4.4

EUVD ID Assigned

Mar 26, 2026 - 19:00 euvd

EUVD-2026-16319

Analysis Generated

Mar 26, 2026 - 19:00 vuln.today

CVE Published

Mar 26, 2026 - 18:39 nvd

HIGH 7.8

DescriptionNVD

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.

AnalysisAI

The Zen C compiler (versions prior to 0.4.4) crashes or enables arbitrary code execution when processing maliciously crafted .zc source files containing excessively long identifiers for structs, functions, or traits, triggering a stack-based buffer overflow (CWE-121). A proof-of-concept exploit exists per SSVC assessment, though attack complexity remains moderate as it requires local access and user interaction (CVSS:3.1/AV:L/AC:L/PR:N/UI:R). …

RemediationAI

Within 24 hours: Identify all systems running Zen C compiler versions prior to 0.4.4 and restrict compilation of untrusted or externally-sourced .zc files. Within 7 days: Apply vendor-released patch to upgrade Zen C compiler to version 0.4.4 or later on all development and build systems. …

Analysis

Detailed AI-generated intelligence summary covering attack vector, impact assessment, affected versions, remediation steps, and indicators of compromise.

POChttps://••••••••••.com/exploit

PATCHhttps://••••••••••.com/patch

ADVISORYhttps://••••••••••.com/advisory

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CVE-2026-33491 vulnerability details – vuln.today

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CVE-2026-33491

CVSS VectorNVD

Lifecycle Timeline

DescriptionNVD

AnalysisAI

RemediationAI

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External POC / Exploit Code