CVE-2021-33591

Name: CVE-2021-33591
Creator: NVD / NIST
Published: 2021-05-28T11:15:08.173+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 1.59%

Last modified Jun 17, 2026

CVE-2021-33591 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. An exposed remote debugging port in Naver Comic Viewer prior to 1.0.15.0 allowed a remote attacker to execute arbitrary code via a crafted HTML page.. EPSS estimates a 1.59% chance of exploitation in the next 30 days.

Description

An exposed remote debugging port in Naver Comic Viewer prior to 1.0.15.0 allowed a remote attacker to execute arbitrary code via a crafted HTML page.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

1.59%

72.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-489

Affected Software

Vendor	Product	Versions
Naver	Comic Viewer	< 1.0.15.0

References

https://cve.naver.com/detail/cve-2021-33591Vendor Advisory
https://cve.naver.com/detail/cve-2021-33591Vendor Advisory

Timeline

Published: May 28, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-33591?

An exposed remote debugging port in Naver Comic Viewer prior to 1.0.15.0 allowed a remote attacker to execute arbitrary code via a crafted HTML page.

How severe is CVE-2021-33591?

CVE-2021-33591 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 1.59% probability of exploitation in the next 30 days.

How do I fix CVE-2021-33591?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-33591?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST