CVE-2016-20091

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-19. the CNA's CVSS baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
Trending — 3 sources updated this weekElevated
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
7.8
EG Score
7.8(medium)
EG Risk
51(Track*)
EG Risk 51/100SSVC: Track*

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity78% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS
1.7%
KEV
Not listed

Published

June 19, 2026

Last Modified

July 15, 2026

Advisory Details (2)

Auto-updated Jun 22, 2026
No patch confirmed yet.
generic

Windows Firewall Control 4.8.6.0 Unquoted Service Path Privilege Escalation | Advisories | VulnCheck

https://www.vulncheck.com/advisories/windows-firewall-control-unquoted-service-path-privilege-escalation
generic

BiniSoft.org

http://www.binisoft.org

Vendor Advisories for CVE-2016-20091(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 11× in last 7d / 79× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-23 01:22 UTCEG score recompute
  2. 2026-07-22 22:01 UTCEG score recompute
  3. 2026-07-22 14:04 UTCEPSS rescore
  4. 2026-07-20 17:03 UTCEPSS rescore
  5. 2026-07-19 14:27 UTCEPSS rescore
  6. 2026-07-18 10:00 UTCEPSS rescore
  7. 2026-07-18 10:00 UTCEPSS rescore
  8. 2026-07-17 01:26 UTCGHSA enrichment
  9. 2026-07-16 16:59 UTCEPSS rescore
  10. 2026-07-16 16:59 UTCEPSS rescore
  11. 2026-07-16 13:11 UTCGHSA enrichment
  12. 2026-07-16 00:59 UTCGHSA enrichment
  13. 2026-07-15 16:54 UTCEPSS rescore
  14. 2026-07-15 16:54 UTCEPSS rescore
  15. 2026-07-15 12:47 UTCGHSA enrichment
  16. 2026-07-15 01:56 UTCEPSS rescore
  17. 2026-07-15 01:56 UTCEPSS rescore
  18. 2026-07-14 23:43 UTCGHSA enrichment
  19. 2026-07-14 11:18 UTCGHSA enrichment
  20. 2026-07-13 22:37 UTCGHSA enrichment
  21. 2026-07-13 22:26 UTCEPSS rescore
  22. 2026-07-13 10:25 UTCGHSA enrichment
  23. 2026-07-13 06:09 UTCEPSS rescore
  24. 2026-07-12 22:13 UTCGHSA enrichment
  25. 2026-07-12 10:00 UTCGHSA enrichment
Show 63 more
  1. 2026-07-12 05:43 UTCEPSS rescore
  2. 2026-07-12 05:43 UTCEPSS rescore
  3. 2026-07-11 21:48 UTCGHSA enrichment
  4. 2026-07-11 09:34 UTCGHSA enrichment
  5. 2026-07-11 08:23 UTCEPSS rescore
  6. 2026-07-10 21:22 UTCGHSA enrichment
  7. 2026-07-10 09:09 UTCGHSA enrichment
  8. 2026-07-09 20:50 UTCGHSA enrichment
  9. 2026-07-09 08:38 UTCGHSA enrichment
  10. 2026-07-08 20:26 UTCGHSA enrichment
  11. 2026-07-08 15:10 UTCEPSS rescore
  12. 2026-07-08 07:57 UTCGHSA enrichment
  13. 2026-07-07 19:45 UTCGHSA enrichment
  14. 2026-07-07 13:42 UTCEPSS rescore
  15. 2026-07-07 04:04 UTCGHSA enrichment
  16. 2026-07-06 16:24 UTCEPSS rescore
  17. 2026-07-06 16:24 UTCEPSS rescore
  18. 2026-07-06 15:49 UTCGHSA enrichment
  19. 2026-07-06 03:32 UTCGHSA enrichment
  20. 2026-07-06 02:20 UTCEPSS rescore
  21. 2026-07-06 02:20 UTCEPSS rescore
  22. 2026-07-05 15:19 UTCGHSA enrichment
  23. 2026-07-05 03:06 UTCGHSA enrichment
  24. 2026-07-05 02:27 UTCEPSS rescore
  25. 2026-07-04 14:54 UTCGHSA enrichment
  26. 2026-07-04 06:28 UTCEPSS rescore
  27. 2026-07-04 02:40 UTCGHSA enrichment
  28. 2026-07-03 14:13 UTCGHSA enrichment
  29. 2026-07-03 02:01 UTCGHSA enrichment
  30. 2026-07-02 13:48 UTCGHSA enrichment
  31. 2026-07-02 01:36 UTCGHSA enrichment
  32. 2026-07-01 13:24 UTCGHSA enrichment
  33. 2026-07-01 01:12 UTCGHSA enrichment
  34. 2026-06-30 23:19 UTCEPSS rescore
  35. 2026-06-30 12:59 UTCGHSA enrichment
  36. 2026-06-30 00:46 UTCGHSA enrichment
  37. 2026-06-29 12:34 UTCGHSA enrichment
  38. 2026-06-29 00:22 UTCGHSA enrichment
  39. 2026-06-28 14:04 UTCEPSS rescore
  40. 2026-06-28 12:09 UTCGHSA enrichment
  41. 2026-06-28 04:53 UTCEPSS rescore
  42. 2026-06-27 23:57 UTCGHSA enrichment
  43. 2026-06-27 11:45 UTCGHSA enrichment
  44. 2026-06-27 03:05 UTCEPSS rescore
  45. 2026-06-27 03:05 UTCEPSS rescore
  46. 2026-06-26 23:32 UTCGHSA enrichment
  47. 2026-06-26 11:19 UTCGHSA enrichment
  48. 2026-06-25 19:51 UTCGHSA enrichment
  49. 2026-06-25 07:37 UTCGHSA enrichment
  50. 2026-06-24 19:24 UTCGHSA enrichment
  51. 2026-06-24 06:03 UTCGHSA enrichment
  52. 2026-06-23 21:30 UTCEPSS rescore
  53. 2026-06-23 17:50 UTCGHSA enrichment
  54. 2026-06-23 05:33 UTCGHSA enrichment
  55. 2026-06-22 17:37 UTCNVD updateCVSS v4 → 8.5
  56. 2026-06-22 17:18 UTCGHSA enrichment
  57. 2026-06-22 05:04 UTCGHSA enrichment
  58. 2026-06-21 16:51 UTCGHSA enrichment
  59. 2026-06-21 04:38 UTCGHSA enrichment
  60. 2026-06-20 16:25 UTCGHSA enrichment
  61. 2026-06-20 04:09 UTCGHSA enrichment
  62. 2026-06-19 15:57 UTCEG score recompute
  63. 2026-06-19 15:56 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2016-20091?
CVE-2016-20091 is a high vulnerability published on June 19, 2026. 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…
When was CVE-2016-20091 disclosed?
CVE-2016-20091 was first published in the National Vulnerability Database on June 19, 2026, with the most recent update on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2016-20091 actively exploited?
CVE-2016-20091 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2016-20091?
CVE-2016-20091 has a CVSS v4.0 base score of 7.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2016-20091?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-20091, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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