Report One MyReport Updater: Local privilege escalation via updater service
Summary
MyReport Updater through version 2.1.1 contains a local privilege escalation flaw in its SYSTEM-level updater service. A low-privileged local user can instruct the service via its gRPC interface to set a malicious reference server and install attacker-supplied archives into arbitrary directories, for example by planting a DLL that a privileged process loads. This leads to code execution as NT AUTHORITY\SYSTEM. The attacker needs a local logon on the affected Windows system.
Affected
- MyReport Updater 0 to 2.1.1 (per CVE record; default state unaffected)
Fixed in
Unknown. No vendor advisory or fixed Updater version was found.
Workaround
- No vendor workaround identified.
- Restrict local logons to hosts running MyReport Updater.
- Restrict access to UpdaterManager.exe and the updater's gRPC port (TCP 9095).
Exploitation
- Public technical write-up by Quarkslab published 13 October 2026.
- No reports of active exploitation in the wild found.
- Public PoC code status unknown.
Our recommendation
- Inventory systems with MyReport Updater 2.1.1 or earlier, especially multi-user systems, terminal servers and shared workstations.
- Ask Report One / MyReport for a patch and the fixed version before closing the finding.
- Restrict local logons and limit who can run the updater.
- Block external access to TCP port 9095 and monitor for unexpected DLLs or archives in the Updater and program directories.
- Recheck NVD and CISA KEV status before the final rating.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Quarkslab: MyReport Updater: From gRPC to SYSTEM blog.quarkslab.com
- VulnCheck advisory: MyReport Updater through 2.1.1 Local Privilege Escalation www.vulncheck.com
- VulDB entry 420055 vuldb.com
- Strix CVE-2026-110633 www.strix.ai
- MyReport vendor website www.myreport.fr
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 1 Nov 2026, 10:35.
Original description (NVD)
MyReport Updater through 2.1.1 contains a local privilege escalation vulnerability that allows low-privileged users to make the SYSTEM updater service install attacker-supplied archives into arbitrary directories. Attackers can use UpdaterManager.exe over gRPC to set a malicious reference server and installLocation, planting a DLL like HID.dll loaded by osk.exe to gain SYSTEM privileges.
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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