CVE-2022-33896

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.

Affected

Hancom · Hancom Office 2020

CVSS v3.1 NVD

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

CVSS v3.0 CISCO

7.8 HIGHCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS

0.53% chance of exploitation in the next 30 days, 43rd percentile

Published

2022-10-07

Updated

2025-04-15

Proof-of-concept exploits (1)

• https://talosintelligence.com/vulnerability_reports/TALOS-2022-1574

References

• CVE Record
• NVD entry