CVE-2011-1255Internet Explorer Vulnerability
The Timed Interactive Multimedia Extensions (aka HTML+TIME) implementation in Microsoft Internet Explorer 6 through 8 does not properly handle objects in memory, which allows remote attackers to execute arbitrary code by accessing an object that (1) was not properly initialized…
Published Jun 16, 2011 · Updated Apr 28, 2026
Key Facts
Patch immediately- CVE-2011-1255 is a critical-severity vulnerability (CVSS 9.3 v2) affecting Internet Explorer (Microsoft).
- It is exploited in the wild, listed in Industry KEV feed since Feb 23, 2016. Public exploit code is available.
- EPSS estimates a 42% 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 it is listed as exploited in the wild.
Scores
CVSS v2
9.3
AV:N/AC:M/Au:N/C:C/I:C/A:C
EPSS (30-day exploit likelihood)
42%
Higher than 98.6% of all scored CVEs
Exploit maturity
Proof of concept
ATLAS score
41/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Feb 23, 2016
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
1
Reports of active use
Advisories And Exploit References
Description
The Timed Interactive Multimedia Extensions (aka HTML+TIME) implementation in Microsoft Internet Explorer 6 through 8 does not properly handle objects in memory, which allows remote attackers to execute arbitrary code by accessing an object that (1) was not properly initialized or (2) is deleted, aka "Time Element Memory Corruption Vulnerability."
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Feb 23, 2016 | n/a | Not reported |
Affected Products
3 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Internet ExplorerMicrosoft | 6, 7, 8 | n/a |
Timeline
Publicly disclosed
Jun 16, 2011
Added to Industry KEV feed
Feb 23, 2016
Last updated
Apr 28, 2026
Weakness Type
- CWE-908 Use of Uninitialized Resource
References
- advisoryblogs.technet.com · ms11-050-ie9-is-better.aspx
- patchMS11-050
- exploitVulnCheck exploitation report
- exploitExploitDB-20547
- other72947
FAQ
Common Questions.
The Timed Interactive Multimedia Extensions (aka HTML+TIME) implementation in Microsoft Internet Explorer 6 through 8 does not properly handle objects in memory, which allows remote attackers to execute arbitrary code by accessing an object that (1) was not properly initialized or (2) is deleted, aka "Time Element Mem…
Affected: Internet Explorer (Microsoft) versions 6, 7, 8. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since Feb 23, 2016.
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 it is listed as exploited in the wild.
Is CVE-2011-1255 On Your Attack Surface?
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