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CVE-2023-33802

MediumPublished

A buffer overflow in SumatraPDF Reader v3.4.6 allows attackers to cause a Denial of Service (DoS) via a crafted text file.

Published: Jul 26, 2023
Updated: Oct 23, 2024
Assigning CNA: mitre
Evidence observed: Aug 8, 2026

Primary CVSS

5.5/ 10Medium

nvd · CVSS 3.1

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

EPSS probability estimate

0.3%

Low · next 30 days

Percentile: 24.2%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

A buffer overflow in SumatraPDF Reader v3.4.6 allows attackers to cause a Denial of Service (DoS) via a crafted text file.

Sources

CVE-2023-33802PoC
Proof-of-concept for CVE-2023-33802, a denial-of-service vulnerability in SumatraPDF 3.4.6 32-bit, triggered by opening two large text files, causing a null pointer write and crash.

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