Description
A remote code execution vulnerability in GFI Kerio Control 9.4.5 allows attackers with administrative access to upload and execute arbitrary code through the firmware upgrade feature. The system upgrade mechanism accepts unsigned .img files, which can be modified to include malicious scripts within the upgrade.sh or disk image components. These modified upgrade images are not validated for authenticity or integrity, and are executed by the system post-upload, enabling root access.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| GFI Software | Kerio Control | 9.4.5 | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
GitHub 1 repository
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cppghoul/CVE-2025-34071 ★ 1 · Oct 9, 2026
RCE in Kerio Control 9.4.5 via unsigned firmware update.
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- https://ssd-disclosure.com/ssd-advisory-kerio-control-authentication-bypass-and-rce/ third-party-advisory technical-description exploit
- https://vulncheck.com/advisories/gfi-kerio-control-auth-bypass-rce third-party-advisory