High severity · published Oct 7, 2022
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
7.8
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 45% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HO
Hancom Office 2020 · Hancom
Hancom Office 2020 11.0.0.5357 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-33896
CVE.org
https://www.cve.org/CVERecord?id=CVE-2022-33896
Exploit
https://talosintelligence.com/vulnerability_reports/TALOS-2022-1574
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