Office and Windows HTML Remote Code Execution in Microsoft Office/Windows Search
CVE-2023-36884 is a Microsoft Office and Windows remote code execution vulnerability that was exploited in the wild as a zero-day in mid-2023. The provided content consistently describes exploitation through specially crafted Microsoft Word or other Office documents that abuse Office/Windows HTML handling and the Windows Search component to execute commands on the victim system while bypassing security mechanisms built into Microsoft Office applications, including Protected View-related protections. Microsoft and multiple referenced reports tie exploitation to phishing campaigns using malicious Word documents and lures related to the Ukrainian World Congress and the NATO Summit. The vulnerability affects Microsoft Office and Windows products and results in code execution in the security context of the victim who opens the malicious document.
Are you exposed to this one?
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos (4 hidden).
This repository provides a proof-of-concept exploit for CVE-2023-36884, a Microsoft Office remote code execution vulnerability exploited via crafted OOXML (DOCX) documents. The main script, 'gen_docx_with_rtf_altchunk.py', automates the creation of a DOCX file containing an RTF altChunk. The RTF file is modified to include a linked OLE object pointing to an attacker-controlled URL (such as an HTTP server or SMB share). When a victim opens the generated DOCX in Microsoft Office, the application processes the altChunk and the OLE object, potentially triggering remote code execution or leaking NTLM hashes to the attacker's server. The repository consists of a Python script for document generation and a README with usage instructions and background on the vulnerability. No weaponized payload is included; the exploit demonstrates the document crafting technique rather than delivering a full attack chain.
Affected products & vendors
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.
Recent activity
35 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Windows Search vulnerability that enables command execution while bypassing Microsoft Office security protections.
A Windows Search vulnerability that enables command execution while bypassing Microsoft Office security mechanisms.
A remote code execution vulnerability affecting Microsoft Office and Windows HTML handling, referenced as an associated analytic story.
A critical vulnerability listed as affecting Microsoft Windows / Netlogon Remote Protocol (MS-NRPC) in the report’s Dragonfly/TA17-293A exploited-vulnerabilities table.
The version that knows your environment.
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.