# CVE-2026-112357: GFI KerioConnect KOFF < 10.0.9p2 Privilege Escalation

Status: published. Published: 2026-10-28. Updated: 2026-11-05.

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.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulnCheck) — https://gfi.ai/resource/kerioconnect-product-releases/

## Affected products and versions

- GFI USA, LLC / GFI KerioConnect: ≥ 0; < 10.0.9p2 (affected, custom). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 8.5 (high); CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N; source: CNA: VulnCheck

- CVSS 3.1: 7.8 (high); CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H; source: CNA: VulnCheck

- CVSS 4.0: 8.5 (high); CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X; source: NVD: disclosure@vulncheck.com

- CVSS 3.1: 7.8 (high); CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H; source: NVD: disclosure@vulncheck.com

- CISA KEV: No listing in collected sources

- EPSS: 0.13% as of 2026-11-05; percentile 2.52%

- SSVC: exploitation none; automatable no; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-276

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://gfi.ai/resource/kerioconnect-product-releases/ (CNA: VulnCheck; release-notes, patch)

- https://www.vulncheck.com/advisories/gfi-kerioconnect-koff-9p2-privilege-escalation (CNA: VulnCheck; third-party-advisory)

- https://gfi.ai/resource/kerioconnect-product-releases/ (disclosure@vulncheck.com)

- https://www.vulncheck.com/advisories/gfi-kerioconnect-koff-9p2-privilege-escalation (disclosure@vulncheck.com)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-112357; retrieved 2026-11-05; source updated 2026-11-05

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-112357; retrieved 2026-11-05; source updated 2026-11-05

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-112357; retrieved 2026-11-05; source updated Not reported

Revision: f02b3682980dbe84516c7ee2106e637340718f2a4625b47fb5a21e5e0bcb79ef

Canonical: https://y2.dev/cve/CVE-2026-112357

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