CVE-2023-50235

Code execution via unchecked PPT data length

Published May 3, 2024 · Updated Aug 2, 2024

Stack-based buffer overflow in Hancom Inc. Hancom Office Show 11.0.0.6931 allows remote attackers to execute code through a crafted PPT file. The PPT parser copies user-supplied data into a stack buffer without validating its length, allowing the copy to overwrite adjacent stack memory. Exploitation requires the target to visit a malicious page or open a malicious file, and successful code runs in the current process.

CVSS severity7.8
High
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in Hancom Inc. Hancom Office Show 11.0.0.6931 allows remote attackers to execute code through a crafted PPT file. The PPT parser copies user-supplied data into a stack buffer without validating its length, allowing the copy to overwrite adjacent stack memory. Exploitation requires the target to visit a malicious page or open a malicious file, and successful code runs in the current process.

The record

CVE
CVE-2023-50235
Published
May 3, 2024
Updated
Aug 2, 2024
Vendor
Hancom Inc.
Product
Hancom Office
Classifications
CWE-121, CWE-787, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 3, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=HancomOffice Show 11.0.0.6931

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Hancom Inc. · Hancom Officeversion=HancomOffice Show 11.0.0.6931
Hancom Inc. · Hancom Office Showversion=11.0.0.6931

Published CVSS scores

7.8Zero Day InitiativeCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.8NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
CWE-787Out-of-bounds Write
T1204.002Malicious File

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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