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CVE-2022-26937 is a critical remote code execution vulnerability in Microsoft Windows Network File System (NFS). According to the provided content, the flaw can be triggered over the network by sending an unauthenticated, specially crafted call to a vulnerable NFS service. The content does not identify the exact vulnerable function or code path, but it clearly places the issue in the Windows NFS service request handling logic. The vulnerability has been described with a CVSS score of 9.8 and as exploitable without authentication. The provided material also states that this vulnerability is not exploitable in NFSv4.1.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos (1 hidden).
This repository contains a proof-of-concept (PoC) exploit for CVE-2022-26937, a vulnerability in the Windows Network File System (NFS) service. The repository consists of two files: a detailed README.md with crash analysis and a Python script (poc.py) that implements the exploit. The Python script targets a specified IPv6 address (default: fe80::69e9:9937:aace:cf0c) and sends specially crafted binary messages to the NFS service over TCP ports 111 and 2049. The payload includes a large buffer of 'A's designed to trigger a stack buffer overflow, resulting in a crash of the NFS service (nfssvr.sys) and a denial of service on the target machine. The exploit is a PoC and does not provide remote code execution or privilege escalation, but demonstrates the ability to remotely crash the NFS service. The code is standalone, written in Python, and requires the target to be accessible over the network with the vulnerable service running.
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7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
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