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CVE-2024-29988 is a high-severity security feature bypass vulnerability in Microsoft SmartScreen on supported Microsoft Windows platforms. The flaw allows an attacker to circumvent SmartScreen prompt protections when a target opens or launches a specially crafted file, causing untrusted content to be treated with reduced warning friction. Microsoft classifies the issue as a protection mechanism failure. Available reporting indicates exploitation involves a crafted file and, in some cases, a launcher configured to suppress user interface prompts, enabling the attacker to sidestep SmartScreen protections that would normally warn users before execution of potentially malicious content.
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What an attacker gets, and what they’ve been doing with it.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos (2 hidden).
This repository contains a Python proof-of-concept exploit for CVE-2024-29988, a critical vulnerability in Microsoft SmartScreen (and potentially related Microsoft gateway products) that allows attackers to bypass the Mark of the Web (MotW) security feature. The exploit script (CVE-2024-29988.py) accepts a target URL or a file with multiple URLs and attempts to interact with a specific /oauth/ endpoint on the target, sending crafted requests to extract session tokens or memory dumps. The script includes options for outputting results, verbosity, and filtering for valid sessions. The README provides context about the vulnerability, its chaining potential with other CVEs, and basic usage instructions. The exploit is network-based, targeting accessible Microsoft SmartScreen endpoints over HTTP/HTTPS, and is intended as a proof-of-concept for security research and educational purposes.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
5 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Microsoft SmartScreen security feature bypass vulnerability affecting several Microsoft products, significant because CISA added it to the KEV catalog due to active exploitation and it can be chained with another flaw during attacks.
A high-severity Windows SmartScreen security feature bypass vulnerability that allows attackers to bypass SmartScreen protections and launch a specially crafted malicious file.
A Microsoft Defender SmartScreen security feature bypass that can be exploited via specially crafted files and a launcher configured to suppress UI, enabling users to be tricked into running malicious content; reported exploited in the wild.
Security feature bypass involving Internet Shortcut Files; assessed as more likely to be exploited within 30 days.
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.