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CVE-2025-55234 is an elevation of privilege vulnerability in Microsoft Windows SMB Server. Under certain configurations, the SMB Server can be susceptible to relay attacks because authentication context validation is insufficient when key hardening controls are not enforced. Public reporting describes the issue as improper authentication handling that allows an attacker with network access to relay SMB authentication traffic against a target host. Microsoft identified SMB Server signing and SMB Server Extended Protection for Authentication (EPA) as the primary hardening mechanisms relevant to this weakness, and introduced auditing capabilities to help administrators assess compatibility before enforcing those protections. Successful exploitation can subject users and systems to relay-driven privilege escalation and may be chained with broader post-compromise activity in Windows enterprise environments.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos (1 hidden).
This repository provides a proof-of-concept (PoC) exploit for CVE-2025-55234, a vulnerability in the SMB protocol on Windows systems that allows for relay attacks leading to elevation of privilege. The repository contains a README.md with a detailed explanation of the vulnerability, its impact, and a PowerShell script demonstrating the attack. The script enumerates SMB shares on a specified target IP, captures session information, and executes an SMB relay attack to impersonate users and gain elevated privileges. The exploit is intended for educational and defensive purposes, helping security professionals test and secure their environments. The only code present is in the README.md as a PowerShell snippet; there are no standalone scripts or binaries. The main fingerprintable endpoint is the target IP address (192.168.1.10) used in the example. The exploit is a PoC and not weaponized, requiring manual configuration and execution.
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28 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A CVE identifier referenced in a fake PoC repository used as a malware delivery lure for SalatStealer; the content gives no details about the actual vulnerability.
A Windows SMB elevation of privilege vulnerability reported as exploited.
Actively exploited privilege escalation vulnerability in Microsoft SMB Server that can be abused via relay attack techniques under certain configurations to capture authentication information and gain unauthorized system access.
A CVE identifier used as a lure label for a malicious GitHub PoC repository associated with Webrat distribution; the article provides no details on the underlying flaw.
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Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.