Exploit for Integer Overflow or Wraparound in Microsoft

githubexploit · 2023-04-16

Description

Exploit for integer overflow in Microsoft Word RTF font table heap corruption (CVE-2023-21716).

Affected software

Microsoft Office= 2019

Microsoft Office Long Term Servicing Channel= 2021

Microsoft Office Online Server= 2016

Microsoft Office Web Apps= 2013

All known vulnerabilities by product

Office Word Sharepoint Foundation Sharepoint Server

CVSS 9.8 for CVE-2023-21716

9.8

HIGH SEVERITY

Version 3.1

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

Attack Vector:NETWORK

Attack Complexity:LOW

Privileges Required:NONE

User Interaction:NONE

Scope:UNCHANGED

Confidentiality:HIGH

Integrity:HIGH

Availability:HIGH

Working code

98%confidence this exploit runs

Based on 2 file(s) in the source

EPSS Score

82.3%higher than 99.6% of all CVEs

Updated 2026-06-16

Exploit Details

Modified:2025-03-29 12:37

Last Seen:2025-09-06 11:10

Reporter:JMousqueton

Written in:YARA

Last commit:2023-04-16

Tags

Microsoft WordInteger overflowHeap corruptionFont tableCVE-2023-21716

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Exploit Code

README3 lines

## https://sploitus.com/exploit?id=2C4D5CFB-737C-5C20-B870-D95B4A7A226B
# CVE-2023-21716
POC : CVE-2023-21716 Microsoft Word RTF Font Table Heap Corruption