High severity7.8NVD Advisory· Published Feb 16, 2022· Updated Jun 17, 2026
CVE-2021-21958
CVE-2021-21958
Description
A heap-based buffer overflow vulnerability exists in the Hword HwordApp.dll functionality of Hancom Office 2020 11.0.0.2353. A specially-crafted malformed file can lead to memory corruption and potential arbitrary code execution. An attacker can provide a malicious file to trigger this vulnerability.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
3- cpe:2.3:a:hancom:hancom_office_2020:11.0.0.2353:*:*:*:*:*:*:*
- Hancom Office 2020/Hancom Office 2020description
- Range: = 11.0.0.2353
Patches
Vulnerability mechanics
References
2- blog.talosintelligence.com/2022/02/vuln-spotlight-.htmlnvdExploitThird Party Advisory
- talosintelligence.com/vulnerability_reports/TALOS-2021-1386nvdExploitThird Party Advisory
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