CVE-2014-6363Internet Explorer Vulnerability
vbscript.dll in Microsoft VBScript 5.6 through 5.8, as used with Internet Explorer 6 through 11 and other products, allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site, aka "VBScript Memory Corruption…
Published Dec 10, 2014 · Updated May 6, 2026
Key Facts
Patch immediately- CVE-2014-6363 is a critical-severity vulnerability (CVSS 9.3 v2) affecting Internet Explorer (Microsoft), Vbscript (Microsoft).
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 28% probability of exploitation in the next 30 days.
- No fixed version is listed yet; check the vendor advisory for mitigations.
- Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
Scores
CVSS v2
9.3
AV:N/AC:M/Au:N/C:C/I:C/A:C
EPSS (30-day exploit likelihood)
28%
Higher than 98.1% of all scored CVEs
Exploit maturity
Proof of concept
ATLAS score
38/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Not listed
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Proof of concept
Public exploit code
1
Proof-of-concept links
In-the-wild evidence
0
Reports of active use
Advisories And Exploit References
Description
vbscript.dll in Microsoft VBScript 5.6 through 5.8, as used with Internet Explorer 6 through 11 and other products, allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site, aka "VBScript Memory Corruption Vulnerability."
Affected Products
9 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Internet ExplorerMicrosoft | 10, 11, 6, 7, 8, 9 | n/a |
| VbscriptMicrosoft | 5.6, 5.7, 5.8 | n/a |
Timeline
Publicly disclosed
Dec 10, 2014
Last updated
May 6, 2026
Weakness Type
- CWE-399
References
- advisory20141209 Microsoft VBScript CRegExp::Execute Uninitialized Memory Vulnerability
- exploitExploitDB-40721
- otherMS14-080
- otherMS14-084
- other40721
FAQ
Common Questions.
vbscript.dll in Microsoft VBScript 5.6 through 5.8, as used with Internet Explorer 6 through 11 and other products, allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site, aka "VBScript Memory Corruption Vulnerability."
Affected: Internet Explorer (Microsoft) versions 10, 11, 6, 7, 8, 9; Vbscript (Microsoft) versions 5.6, 5.7, 5.8. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
Is CVE-2014-6363 On Your Attack Surface?
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