CVE-2018-8373
ENISA EUVD: EUVD-2018-20017 ↗
Exploited in the Wild
✓ Confirmed 0-Day
★ Google Project Zero
Triaged: March 5, 2026
4 articles
EPSS Score
Source: FIRST.org · 2026-05-24
82.49%
probability
This CVE has a 82.49% probability
of being exploited in the next 30 days.
0%
Top 99.2th percentile of all CVEs
100%
CVSS v3.1
Source: NVD7.5
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Description
Project ZeroUse-after-free in VBScript AssignVar
Affected Products
Attack Intelligence
Google Project Zero
Discovered
July 11, 2018
Patched
Aug. 14, 2018
Reported by
Elliot Cao of Trend Micro Security Research working with Trend Micro’s Zero Day Initiative (ZDI)
Root Cause Analysis
???
Zero-Day In Microsoft's VBScript Engine Used By Darkhotel APT
BleepingComputer
Aug 18, 2018
Microsoft August 2018 Patch Tuesday Fixes 60 Security Flaws, Including Two Zero-Days
BleepingComputer
Aug 14, 2018
Signal Intelligence
Confidence
95%
EPSS
82.49%
CVSS v3.1
7.5
Mentions
4
Last Seen
Aug 18, 2018
CNA Information
Analyst Note
Auto-imported from Google Project Zero — confirmed zero-day by definition.
Triage Info
Decided atMar 05, 2026