CVE-2018-8174 kev+ ransomware in the critical feed json
A remote code execution vulnerability exists in the way that the VBScript engine handles objects in memory, aka "Windows VBScript Engine Re…
published 2018-05-09 8 y ago modified 2026-08-13 2 mo ago also EUVD-2018-19844
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Exploited
- added 2022-02-15, used in ransomware
- epss
- 88.2%
- EPSS 88.2% chance of exploitation in 30 days, percentile 99.7%
- public exploits
- 1
- Exploit-DB
Summary
A remote code execution vulnerability exists in the way that the VBScript engine handles objects in memory, aka "Windows VBScript Engine Remote Code Execution Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers.
Patch / fix
cisa required action Apply updates per vendor instructions.
Timeline
- 0-day patched (Project Zero)
- Published
- First public exploit (EDB-44741)
- CISA SSVC: exploitation active
- Added to CISA KEV
- CISA patch deadline
Known exploited
- Added
- 4 y ago
- Patch by
- 2022-08-15 (4 y ago)
- Ransomware
- Known to be used in ransomware campaigns
- Required action
- Apply updates per vendor instructions.
- Vendor, product
- Microsoft, Windows
- CISA name
- Microsoft Windows VBScript Engine Out-of-Bounds Write Vulnerability
Zero-day
Detected in real attacks while still unknown to the vendor and the public, per Google Project Zero's 0day In-the-Wild tracker.
- Patched
- 2018-05-08
- Details
- project zero tracker
CISA SSVC
- Exploitation
- Active, exploited in the wild
- Automatable
- no
- Technical impact
- total
- Assessed
- 4 y ago
Exploit prediction
88.24% chance of exploitation in the next 30 days, higher than 99.7% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- EDB-44741 Microsoft Internet Explorer 11 (Windows 7 x86/x64) - vbscript Code Execution local, 2018-05-21
- blog.0patch.com https://blog.0patch.com/2018/05/a-single-instruction-micropatch-for.html referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H |
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.6 | AV:N/AC:H/Au:N/C:C/I:C/A:C |
Affected products
- Microsoft Windows 7
- Microsoft Windows Server 2012 R2
- Microsoft Windows RT 8.1
- Microsoft Windows Server 2008
- Microsoft Windows Server 2012
- Microsoft Windows 8.1
- Microsoft Windows Server 2016
- Microsoft Windows Server 2008 R2
- Microsoft Windows 10
- Microsoft Windows 10 Servers
Classification
- Weakness
-
- CWE-787 Out-of-bounds Write
References
-
portal.msrc.microsoft.com
/en-US/security-guidance/advisory/CVE-2018-8174
patch, vendor-advisory
-
exploit-db.com
/exploits/44741/
exploit, third-party-advisory, vdb-entry
-
blog.0patch.com
/2018/05/a-single-instruction-micropatch-for.html
exploit, technical-description, third-party-advisory
-
securityfocus.com
/bid/103998
vdb-entry, third-party-advisory
-
cisa.gov
/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-8174
government-resource, us-government-resource
Sources
- CVE List CVE-2018-8174
- NVD CVE-2018-8174
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.