PT-2023-1608 · Microsoft · Office Word+2

Joshua J. Drake · Published 2023-02-14 · Updated 2026-02-04 · CVE-2023-21716

Positive Technologies (AI Summary)

CVSS v3.1

10

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions Microsoft Word (affected versions not specified)

Description The issue is related to a buffer overflow in memory, allowing remote attackers to execute arbitrary code by opening a specially crafted file. This can affect the system. The vulnerability is associated with the RTF parser and can be triggered with a table of fonts containing an excessive number of entries. It has been reported that a proof-of-concept exploit is available, which can be chained with other vulnerabilities to achieve remote code execution.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

RCE

Buffer Overflow

Integer Overflow

Weakness Enumeration

CWE-119

CWE-190

Related Identifiers

BDU:2023-01104

CVE-2023-21716

Affected Products

Office Word

Sharepoint Foundation

Sharepoint Server

References · 41

• 🔥 https://github.com/gyaansastra/CVE-2023-21716 · Exploit
• 🔥 https://github.com/Xnuvers007/CVE-2023-21716 · Exploit
• 🔥 https://github.com/JMousqueton/CVE-2023-21716 · Exploit
• 🔥 https://github.com/hv0l/CVE-2023-21716_exploit · Exploit
• 🔥 https://github.com/FeatherStark/CVE-2023-21716 · Exploit
• 🔥 https://github.com/MojithaR/CVE-2023-21716-EXPLOIT.py · Exploit
• https://bdu.fstec.ru/vul/2023-01104 · Security Note
• https://safe-surf.ru/specialists/bulletins-nkcki/690107 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21716 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-21716 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-21716 · Security Note
• https://osv.dev/vulnerability/CVE-2023-21716 · Vendor Advisory
• https://qoop.org/publications/cve-2023-21716-rtf-fonttbl.md · Note
• https://t.me/avleonovcom/1093 · Telegram Post
• https://twitter.com/davidsheyi/status/2019033643365064898 · Twitter Post