CVE-2022-33896

Name: CVE-2022-33896
Creator: NVD / NIST
Published: 2022-10-07T15:15:15.553+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.50%

Last modified Jun 17, 2026

CVE-2022-33896 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. A buffer underflow vulnerability exists in the way Hword of Hancom Office 2020 version 11.0.0.5357 parses XML-based office files. A specially-crafted malformed file can cause memory corruption by using memory before buffer start, which can lead to code execution. EPSS estimates a 0.50% chance of exploitation in the next 30 days.

Description

A buffer underflow vulnerability exists in the way Hword of Hancom Office 2020 version 11.0.0.5357 parses XML-based office files. A specially-crafted malformed file can cause memory corruption by using memory before buffer start, which can lead to code execution. A victim would need to access a malicious file to trigger this vulnerability.

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

0.50%

38.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-124

Affected Software

Vendor	Product	Versions
Hancom	Hancom Office 2020	11.0.0.5357

References

https://talosintelligence.com/vulnerability_reports/TALOS-2022-1574Exploit, Third Party Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2022-1574Exploit, Third Party Advisory

Timeline

Published: Oct 7, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-33896?

How severe is CVE-2022-33896?

CVE-2022-33896 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.50% probability of exploitation in the next 30 days.

How do I fix CVE-2022-33896?

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-2022-33896?

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

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Source: NVD / NIST