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CVE-2023-35636 is an information disclosure vulnerability in Microsoft Outlook that can expose sensitive authentication material to an unauthorized attacker. Available reporting associates the issue with abuse of a crafted parameter that can cause Outlook-related content handling to reference attacker-controlled network locations, resulting in leakage of Net-NTLM/NTLM authentication data. The vulnerability has been cited in the context of injected UNC path references in email content or headers, where processing the crafted content can trigger outbound authentication and disclose confidential credential material.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository provides a proof-of-concept exploit for CVE-2023-35636, a Microsoft Outlook information disclosure vulnerability. The exploit consists of a single Expect script ('cve-2023-35636.sh') and a detailed README. The script automates the process of sending a specially crafted email via SMTP to a target Outlook user. The email includes headers that cause Outlook, upon user interaction (clicking the calendar icon), to connect to an attacker-controlled SMB share. This results in the victim's NTLMv2 hash being sent to the attacker's SMB server, which can then be cracked offline. The README provides usage instructions, prerequisites (such as running a responder SMB server and ensuring outbound SMB traffic is allowed), and post-exploitation steps for extracting and cracking the captured hashes. The exploit targets Microsoft Outlook on Windows and demonstrates a network-based attack vector leveraging email and SMB protocols. No detection scripts or fake code are present; the repository is a functional POC exploit.
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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.
An NTLM hash leakage vulnerability previously documented in connection with the "crumb=location:" parameter and referenced as related to the newly disclosed Windows search URI handler issue.
A vulnerability involving abuse of the "crumb" parameter to steal an NTLM hash.
A vulnerability that allows attackers to inject UNC paths into emails, which can be used to exfiltrate NetNTLM hashes from recipients who open the email and whose clients attempt to load the injected resource.
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.