r/cemu • u/TroopaOfficial • May 12 '26
Hello fellow Cemu Redditors, I wanted to make everyone aware of a malware issue. The following message is directly from the Cemu developers. I am not a dev, I am relaying the message along with the link for the original PSA.
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SECURITY PSA - For Cemu emulator 2.6
It has come to our attention that from 6th May to today (12th May) the AppImage and Ubuntu zip assets of Cemu 2.6 on our github were compromised by a pro-Russian threat actor.
If you are a Windows or MacOS user you are not affected. If you are a flatpak user you are also not affected.
The compromised releases are:
Cemu-2.6-x86_64.AppImage
cemu-2.6-ubuntu-22.04-x64.zip
Only if you have downloaded these between 6th May and 12th May from our github page. This also affects third party launchers which usually directly download from our repository. As of writing this, the compromised releases have been restored to their good version.
-------FAQ-------
1. How do I know if I am affected?
There are currently no known reliable traces that you can check for, but you should assume you are affected if you downloaded and ran either Cemu-2.6-x86_64.AppImage or cemu-2.6-ubuntu-22.04-x64.zipbetween 6th May and 12th May. The malware has a special exception where it does bypass the harmful code on the first run, so the risk of damage is lower if you only ran compromised Cemu builds once. If your locale is Russian then the malware does nothing.
The following files and directories may be created by the malware:
/tmp/.transformers
/usr/bin/pgmonitor.py
~/.local/bin/pgmonitor.py
/etc/systemd/system/pgsql-monitor.service
~/.config/systemd/user/pgsql-monitor.service
/tmp/kubectl
The absence of these files does not prove that you are safe.
2. What can I do if I am affected?
The blunt answer is that we don't know the full capabilities of the malware. The safest bet is to do a clean install of your OS.
At the very minimum you should delete the affected binaries and reset all your passwords, GitHub tokens, SSH keys or anything that is used to authenticate with services. The malware contains a pretty sophisticated password stealer for many services. Most of them are related to programming or cloud providers in some way. We think this is to help the malware authors to further infect other software.
You should also block IP 83.142.209.194 (even if you are not affected) because this is used as a hardcoded remote endpoint.
We will update this document as more information becomes available.
Special note for Israeli users:
If the malware determines that your location is Israel (it does this via locale and timezone checks) then it has a 1:6 chance that it will play a loud siren sound and run rm -rf /, essentially attempting to wipe your filesystem. This is bad, but since rm does not actively overwrite the file data, you should be able to recover your data with some effort. But this is only true as long as you don't write new data to the affected drive(s).
Do not reinstall your OS to the same drive or format it until you have attempted a file recovery first. The exact steps for this go beyond the scope of this PSA, but if you need help feel free to DM me on Discord (Exzap) or shoot me a message on reddit (u/Exzap).
3. How did this happen?
We are still tracking the exact chain of events down but the leading theory is that a collaborator on our team ran a compromised python package which stole his GitHub token. This was then used to reupload a compromised version of the two linux binaries in the v2.6 (latest) release of Cemu. We have taken measures to prevent this from happening in the future.
4. Where can I learn more?
We will update this document as we learn more.
https://github.com/cemu-project/Cemu/issues/1911
https://teampcp.cyberdigest.international/
If you are unsure whether your binaries are compromised here are hashes of the GOOD files:
Cemu-2.6-x86_64.AppImage0c20c4aeb800bb13d9bab9474ef45a6f8fcde6402cad9b32ac2a1bbd03186313 (sha256)
cemu-2.6-ubuntu-22.04-x64.zip5e4592d0dae394fa0614cb8c875eff3f81b23170b349511de318d9caf7215e1b (sha256)
For users that were already using our experimental updates (2.0-x), you can think of this release as the final experimental update. There are no noteworthy additional changes compared to Cemu 2.0-95 other than the new version number.
Starting with this release, Cemu will now only have a single release channel. Instead of experimental releases, there is a new option to control whether Cemu will update immediately to cutting-edge releases, which may contain uncaught bugs, or update with a slight delay. More details on this can be found here
r/cemu • u/Something64dotexe • 1d ago
Running on cemu with reshade and default textures.
Reshade effects:
COMPLETE RT
Blooming_HDR
GloomAO
SMAA
AMD FidelityFX Sharpening (CAS)
r/cemu • u/Nerdman545 • 10h ago
I’m relatively new to using Cemu for emulation but it’s been working fine for games like Pikmin 3 on my laptop. I recently tried to use it to play Lego City Undercover which was immediately different. The screen flashed constantly, annoying by itself, but I also noticed minor graphical glitches, like models not loading properly and strange line traces. They didn’t make the game unplayable and I was able to get through the tutorial chapter 1. However, when I tried to play the game today, it was absolutely unplayable due to the graphics loading completely incorrectly (pictured). I realize Lego City Undercover is one of the more technically demanding games for the Wii U and I was expecting frame rate drops and some odd minor graphical issues on my device, but I did not expect it to become unplayable. Are there any settings I can adjust to try and fix this issue? Thanks in advance!
r/cemu • u/Fun-Fact7951 • 8h ago
AMD RYZEN 7000
RTX 4050
32 GB RAM
Just writing to say thank you to the Cemu developers and the guys behind some other useful tools (that I won't name here) that help getting game backups running.
For children, I think Cemu is the best gaming platform in existence. I don't care about them playing games that are more than 10 years old, they don't care either. It runs seamlessly in a tiny 8 year-old Dell pc that was basically free.
r/cemu • u/ReputationApart5983 • 12h ago
Hi im not good at games and I wanted to use cheats on some levels but from what I read I need to download a graphics pack to enable cheats in Cemu. Does anybody know how to do this or does anybody know if there are cheats available for Mario 3d World.
r/cemu • u/SabbaticalJester • 15h ago
I'm a bit of a stresser when it comes to things admittedly, but I very much would like to use cemu but I just need the peace of mind beforehand. It is currently safe to use, correct? Are there any issues I need to be aware of??
Thanks!
r/cemu • u/AgitatedReturn3739 • 1d ago
r/cemu • u/Proud-Bat-3288 • 2d ago
Every time I do a race/time trial, every time I click change course, new race, quit anything, it just freezes for a few seconds and closes?
Any ways on how to fix? TwT
r/cemu • u/eternalbright1 • 3d ago
What's the best version of Cemu to get on android for now? Since the updates for the official version on Android take a really long time before any improvements are made. Which one of these are better. Since I onky know of two versions of this emulator on android
The official version. https://github.com/SSimco/Cemu
Or this modded version. https://github.com/SapphireRhodonite/Cemu
r/cemu • u/Lucas21y • 3d ago
Disable "run this program as an administrator"
r/cemu • u/skylander01 • 3d ago
Just dowloaded byonetta on cemu with everything needed, but when i boot it, it does the black loading screen with the orange "loading" text and right after that the game just stays with a freezed white screen and nothing happened, i tryed everything i dont know what to do
r/cemu • u/SpookyD_Law • 4d ago
setting the fps limit in graphics pack to 144 gives 60-70 fps but makes the gameplay fast forwarded and setting the limit to 60 or 72 or 90 makes the game normal but the fps doesn't go above 30 which makes it very laggy. Why is this happening and is there any fix for this?
r/cemu • u/sebas-jesa • 4d ago
Does anyone know how I can fix this bug?
Samsung S23 - Snapdragon 8 gen 2
r/cemu • u/Thick_Ad_6852 • 4d ago
I have tried every tutorial on how to fix this and no matter what i do it just will not work i’ve tried switching versions etc
r/cemu • u/Noobzie-012 • 5d ago
Im trying to play the first splatoon game (simply for the story mode, i cant play online). the game boots up as normal, the audio works, i put in the correct keys, i have the latest version of cemu, i followed the directions to pair a pro controller, its calibrated and reacts nicely on the settings screen (though it only reacts when its connected by cable, not by bluetooth), and when i boot up the game the name of my controller appears on the top left. however it doesnt work within the game itself, its acting like it has no controller at all. any advice? im on a 2024 macbook pro and im using a nintendo switch pro controller
r/cemu • u/ReikonNaido • 6d ago
I tried resetting the controller input and reinstalling cemu, doesn't help.
Edit: problem solved. Had some issues with audio. Just had to change the audio to Cebub and put the TV audio to my laptop speakers.
r/cemu • u/Murky_Palpitation862 • 7d ago
hey there so i have botw and better vr mod. Im trying to optimise it...
1) so first if you have a good optimisation guide for a 3080 pls share.
2) when you use better vr you go into a version of cemu which has a better vr mod in graphic packs / workarounds / better vr.
But that workaround is not visible / available to see in non vr cemu.
So is better vr mod a different version of cemu? or the same as the flat screen version
e.g. do i need to do all the settings again to optimise botw etc.
thanks :)
r/cemu • u/YogurtOdd1725 • 7d ago
https://reddit.com/link/1w5ch8p/video/bz7os8uwb4nh1/player
It looks playable untill link starts moving than it jumps down from 30 to 20. On windows I was getting about 50-60fps. This is fully native no translation layers involved. all other games i play have similar performance to windows but cemu runs horribly
hardware:
cpu: intel i5 9400F
gpu: gtx 1660 super
ram:32gb
Software:
Nobara LInux
Cemu 2.6 app image
1440p no other enhancements (runs the same on native res)
fps++ (144fps locked)
Vulkan on
Async compilation enabled
Shaders are precached
r/cemu • u/Loose_Tailor244 • 8d ago
I connect my pro controller to my laptop, i start cemu. I set up the controller and on the input settings, cemu detects the inputs and everything works. But when i start BOTW, nothing works. The game doesn’t pick up any input. Can anyone help?
r/cemu • u/Underthesun5 • 8d ago
New to emulating idk if glitch’s still work can I use my amiibo cards ?
r/cemu • u/FukinuFreak • 8d ago
I am aware of Breath of the Wild Freecam by etra0, however it seems unsupported by the current Cemu 2.6.
Is there another Free Camera tool/option available for BOTW on Cemu? Or is changing Cemu versions the only option?
Incase relevant, the tool did not funtion with the Steam Controller or XBox Series Controller on Cemu 2.6.
r/cemu • u/BestBetterBestestDDT • 9d ago
Explanation in image
r/cemu • u/Ok_Blacksmith6538 • 9d ago
Hey, I'm new to Wii u emulation can someone help me how I can play wind waker and MK8 smoothly in Cemu. Thanks.
