An issue was discovered in a third-party com.factory.mmigroup component, shipped on devices from multiple device manufacturers. Certain software builds for various Android devices contain a vulnerable pre-installed app with a package name of com.factory.mmigroup (versionCode='3', versionName='2.1) that allows local third-party apps to perform various actions, due to inadequate access control, in its context (system user), but the functionalities exposed depend on the specific device. The following capabilities are exposed to zero-permission, third-party apps on the following devices: arbitrary AT command execution via AT command injection (T-Mobile Revvl 6 Pro 5G, T-Mobile Revvl V+ 5G, and Boost Mobile Celero 5G); programmatic factory reset (Samsung Galaxy A03S, T-Mobile Revvl 6 Pro 5G, T-Mobile Revvl V+ 5G, Boost Mobile Celero, Realme C25Y, and Lenovo Tab M8 HD), leaking IMEI (Samsung Galaxy A03S, T-Mobile Revvl 6 Pro 5G, T-Mobile Revvl V+ 5G, Boost Mobile Celero, and Realme C25Y); leaking serial number (Samsung Galaxy A03s, T-Mobile Revvl 6 Pro 5G, T-Mobile Revvl V+ 5G, Boost Mobile Celero, Realme C25Y, and Lenovo Tab M8 HD); powering off the device (Realme C25Y, Samsung Galaxy A03S, and T-Mobile Revvl 6 Pro 5G); and programmatically enabling/disabling airplane mode (Samsung Galaxy A03S, T-Mobile Revvl 6 Pro 5G, T-Mobile Revvl V+ 5G, Boost Mobile Celero, and Realme C25Y); and enabling Wi-Fi, Bluetooth, and GPS (Samsung Galaxy A03S, T-Mobile Revvl 6 Pro 5G, T-Mobile Revvl V+ 5G, Boost Mobile Celero, and Realme C25Y). No permissions or special privileges are necessary to exploit the vulnerabilities in the com.factory.mmigroup app. No user interaction is required beyond installing and running a third-party app. The software build fingerprints for each confirmed vulnerable device are as follows: Boost Mobile Celero 5G (Celero5G/Jupiter/Jupiter:11/RP1A.200720.011/SW_S98119AA1_V067:user/release-keys, Celero5G/Jupiter/Jupiter:11/RP1A.200720.011/SW_S98119AA1_V064:user/release-keys, Celero5G/Jupiter/Jupiter:11/RP1A.200720.011/SW_S98119AA1_V061:user/release-keys, and Celero5G/Jupiter/Jupiter:11/RP1A.200720.011/SW_S98119AA1_V052:user/release-keys); Samsung Galaxy A03S (samsung/a03sutfn/a03su:13/TP1A.220624.014/S134DLUDU6CWB6:user/release-keys and samsung/a03sutfn/a03su:12/SP1A.210812.016/S134DLUDS5BWA1:user/release-keys); Lenovo Tab M8 HD (Lenovo/LenovoTB-8505F/8505F:10/QP1A.190711.020/S300637_220706_BMP:user/release-keys and Lenovo/LenovoTB-8505F/8505F:10/QP1A.190711.020/S300448_220114_BMP:user/release-keys); T-Mobile Revvl 6 Pro 5G (T-Mobile/Augusta/Augusta:12/SP1A.210812.016/SW_S98121AA1_V070:user/release-keys and T-Mobile/Augusta/Augusta:12/SP1A.210812.016/SW_S98121AA1_V066:user/release-keys); T-Mobile Revvl V+ 5G (T-Mobile/Sprout/Sprout:11/RP1A.200720.011/SW_S98115AA1_V077:user/release-keys and T-Mobile/Sprout/Sprout:11/RP1A.200720.011/SW_S98115AA1_V060:user/release-keys); and Realme C25Y (realme/RMX3269/RED8F6:11/RP1A.201005.001/1675861640000:user/release-keys, realme/RMX3269/RED8F6:11/RP1A.201005.001/1664031768000:user/release-keys, realme/RMX3269/RED8F6:11/RP1A.201005.001/1652814687000:user/release-keys, and realme/RMX3269/RED8F6:11/RP1A.201005.001/1635785712000:user/release-keys). This malicious app sends a broadcast Intent to com.factory.mmigroup/.MMIGroupReceiver. This causes the com.factory.mmigroup app to dynamically register for various action strings. The malicious app can then send these strings, allowing it to perform various behaviors that the com.factory.mmigroup app exposes. The actual behaviors exposed by the com.factory.mmigroup app depend on device model and chipset. The com.factory.mmigroup app executes as the "system" user, allowing it to interact with the baseband processor and perform various other sensitive actions.
Google Brotli decoder - Remote Code Execution via compressed requests (Exploitation Check)
This control is the second step of the Patrowl response to CVE-2026-111497 (Node2Shell). It complements the first control of 22 October 2026, which focused on the Node.js runtime, and does not replace it.
Why a second control
CVE-2026-111497 is an out-of-bounds write in the Google Brotli decoder, the library that decompresses Brotli ("br") data. It was first published as a Node.js vulnerability, because Node.js bundles this decoder. Later publications showed that the flaw is in the library itself. Every product that embeds an affected version of the decoder is concerned, whatever its language or vendor. A public proof of concept demonstrates code execution.
Any server that decompresses request bodies sent with "Content-Encoding: br" exposes the decoder to unauthenticated attackers. Known cases include Express 5 and NestJS 11 on Node.js, Koa and Fastify setups, Bun, Envoy and Istio with request decompression enabled, and any application or reverse proxy that decodes Brotli request bodies with an affected library.
The flaw also works in the other direction. A malicious server can compromise an unpatched client that decodes a Brotli response, for example Node.js fetch(), Python clients (requests, httpx, aiohttp, Scrapy) with the Brotli or brotlicffi package, or libcurl builds with Brotli support.
What this control checks
Patrowl sends small, valid Brotli-compressed requests to each asset and observes whether the server decodes them. The check does not depend on the technology: it detects the behaviour, whatever the stack behind it. These requests are what any legitimate client could send. They never reach the vulnerable code path and cannot affect the availability of the service.
How to read the result
Potentially impacted means the asset decodes Brotli request bodies: the attack surface is exposed. It does not confirm that the asset is vulnerable. The version of the Brotli decoder in use is not visible from the outside.
This check covers applications that parse request bodies on their root path. A Not impacted result does not rule out exposure on other routes, nor on the client side. Checking the versions on the servers remains the only exhaustive verification.
Affected and fixed versions
Google Brotli 1.0.3 to 1.2.0 are affected, fixed in 1.0.10, 1.1.1 and 1.2.1. Fixed releases of the main products embedding it: Node.js 22.23.4, 24.22.1 and 26.12.1 (end-of-life lines 20.x and older and 25.x receive no fix), Bun 1.4.4, Envoy 1.37.8, 1.38.6, 1.39.3 and 1.40.0, Istio 1.29.9, 1.30.6 and 1.31.2, Python Brotli 1.2.1 and brotlicffi 1.2.1.0. Products that link against the system library depend on the Brotli package of the Linux distribution.
Recommendations
Update every component that embeds the Brotli decoder (only real fix). Start with the assets flagged by this control. Restart the processes after the update. Rebuild containers, single-executable applications and appliances that bundle an affected runtime or library.
Reduce the exposure until the update is deployed. Reject requests with "Content-Encoding: br" at the reverse proxy, load balancer or WAF, case-insensitively and including lists such as "gzip, br". On Envoy and Istio, disable request decompression for Brotli.
Review outbound calls. List the features that fetch content from servers you do not control, and patch the services that host them first.
