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TI-2026-82010 Aliases CVE-2026-112357GHSA-mcj5-656f-pmhr

Privilege escalation in GFI KerioConnect KOFF via weak installer permissions

Priority LOW 38CWE-276Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

GFI KerioConnect Outlook Connector (Offline Edition), known as KOFF, before 10.0.9 Patch 2 is affected. Weak installer permissions leave the product directory writable by the built-in Users group. A local non-administrative attacker can replace the searchd.exe service binary used by KOFFIndexingService, which runs as LocalSystem, so code runs with SYSTEM privileges when the service next starts or the system reboots. The flaw is classified as CWE-276.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

GFI KerioConnect (Kerio Connect) Outlook Connector (Offline Edition), 'KOFF', before 10.0.9 Patch 2 contains a local privilege escalation vulnerability caused by weak installer permissions that leave the product directory writable by the built-in Users group. A local non-administrative attacker can replace the searchd.exe service binary used by the bundled KOFFIndexingService, which runs as LocalSystem, to execute arbitrary code with NT AUTHORITY\SYSTEM privileges upon the next service start or reboot.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00129 2nd percentileScored 2026-11-07
Fix Fixed GFI KerioConnect (GFI USA, LLC): 10.0.9p2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
GFI USA, LLCGFI KerioConnectbefore 10.0.9p210.0.9p2Patch availableCNA
  • GFI KerioConnect VendorGFI USA, LLC Affected before 10.0.9p2 Fixed in 10.0.9p2 Patch available CNA

Remediation

Update GFI KerioConnect KOFF to version 10.0.9p2 or later, which fixes the issue.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA GFI KerioConnect (GFI USA, LLC) Fixed in 10.0.9p2

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    GFI KerioConnect 10.0.9p2

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2026-82009 Cross-site scripting in GFI KerioConnect via link auto-formatterPriority LOW 23
    Show all 2 records →

Timeline

  1. 2026-10-28 Threatist record created from CVE-2026-112357
  2. 2026-10-28 Alias added: GHSA-mcj5-656f-pmhr
  3. 2026-10-30 Priority changed: MEDIUM → LOW
  4. 2026-11-05 CISA SSVC decision points changed

References

Patch 1

  • TI-2026-81415 Stored cross-site scripting in GFI KerioConnect Webmail CVSS 4.0MEDIUM 6.2
  • TI-2026-82009 Cross-site scripting in GFI KerioConnect via link auto-formatter CVSS 4.0MEDIUM 5.1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences