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CVE-2023-21823 is an actively exploited zero-day vulnerability in the Microsoft Windows Graphics component. It is characterized as an elevation-of-privilege issue, and Microsoft identified OneNote as a vulnerable component. Some advisories also describe the issue as potentially permitting arbitrary code execution.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository contains a C-language proof-of-concept exploit for CVE-2023-21823, targeting Microsoft Windows. The main file, 'poc.с', implements a reverse shell payload: when executed on a Windows system, it connects back to an attacker-controlled IP address and port (default: 192.168.0.1:1234, which must be changed by the user before compilation). Upon successful connection, it spawns a command shell (cmd.exe) with its input and output redirected to the network socket, granting the attacker remote command execution capabilities. The README provides build instructions for MinGW and Visual Studio, and usage notes. The exploit is operational, requiring the attacker to set up a listener and modify the source with their own IP/port. No detection or fake code is present; the code is a functional reverse shell for post-exploitation or demonstration purposes.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.