Vulnerability
CVE-2018-8639
Microsoft Windows: privilege escalation
Most severe levelNo level of its own
Official data
- 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 - Weakness
- CWE-404
- EPSS
- 22.18% probability of exploitation in the next 30 days, higher than 97% of CVEs
- CISA KEV catalogue
- Yes, since 3 March 2025 · used in ransomware campaigns
Sources: NVD (CVSS, weakness, publication), FIRST (EPSS), CISA (KEV catalogue).
Data read on 4 November 2026.
Timeline
- 12 December 2018Published on NVD
- 3 March 2025Added to the CISA KEV catalogue
In DefenceLevel briefings1 day
- 12 October 2026Worth watching
Last 12 months.
The full analysis is in the briefingThe full analysis is in your archive
Why it matters now, who is affected and what to do: every day at 05:00 UTC, for subscribers.Why it matters, who is affected and what to do, as in the daily briefing.
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