CVE-2016-20091

Windows Firewall Control 4.8.6.0 Unquoted Service Path Privilege Escalation

CVSS 8.5 HIGHEPSS 0.1%CWE-428

Vexday Risk Score

41Attention

SSVC decision (CISA)

Attend

PoC available → attend closely

CVSS 8.5EPSS 0.1%KEV nãoPoC públicaNuclei —Metasploit —Patch —

Lifecycle

19 Jun 2026Published on NVD

Recommendation: Plan a near-term fix — a public PoC already exists.

Windows Firewall Control 4.8.6.0 contains an unquoted service path vulnerability that allows local attackers to escalate privileges by inserting malicious executables in the service path. Attackers can place executable files in unquoted path directories that the wfcs.exe service will execute with LocalSystem privileges upon service restart or system reboot.

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

Affected products

Binisoft · Windows Firewall Control

public PoCs found — 1

cve_referencewww.exploit-db.com/exploits/40443unverified

⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

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References

https://www.exploit-db.com/exploits/40443 https://www.vulncheck.com/advisories/windows-firewall-control-unquoted-service-path-privilege-escalation http://www.binisoft.org