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CVE Record

CVE-2011-1266: The Vector Markup Language (VML) implementation in vgx.dll in Microsoft Internet Explorer 6 through 8 does...

The Vector Markup Language (VML) implementation in vgx.dll 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 "VML Memory Corruption Vulnerability."

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

This is a remote code execution flaw in Internet Explorer 6 through 8's VML handling. A user exposed through a vulnerable browser could be compromised when IE processes malformed VML content. The provided sources do not show current active exploitation, but the business risk is high for any remaining legacy IE use.

Executive priority

Prioritize remediation if any legacy IE 6 through 8 systems remain. The vulnerability enables remote code execution, which can lead to endpoint compromise. If legacy IE is fully retired, priority drops to confirming inventory and documenting non-exposure.

Technical view

CVE-2011-1266 is a memory corruption vulnerability in vgx.dll, Internet Explorer's VML implementation. The flaw involves improperly initialized or deleted objects in memory and can allow remote attackers to execute arbitrary code. Microsoft tracks it in MS11-052, and CIS OVAL provides a detection definition.

Likely exposure

Exposure is most likely on systems still running Microsoft Internet Explorer 6, 7, or 8, especially where legacy web applications require VML or old IE document modes. Modern environments without these browser versions are unlikely to be affected based on the provided bundle.

Exploitation context

The source bundle describes remote arbitrary code execution through IE's VML memory handling. KEV is false, and no provided source states active exploitation. Treat exploitation status as unconfirmed, not actively exploited, based only on this evidence.

Researcher notes

The CVE record provides the core flaw description but no CVSS, CWE, CPE, or exploit evidence in the bundle. MS11-052 is the primary vendor reference. Avoid asserting affected Windows versions, exploit availability, or specific patch mechanics beyond the advisory.

Mitigation direction

  • Apply Microsoft's MS11-052 guidance for affected Internet Explorer deployments.
  • Retire Internet Explorer 6 through 8 wherever operationally possible.
  • Restrict legacy IE use to isolated, required business workflows only.
  • Check vendor guidance before relying on compensating controls.
  • Use supported browsers for normal web access.

Validation and detection

  • Inventory endpoints for Internet Explorer 6, 7, or 8 usage.
  • Confirm MS11-052 is installed on any affected Windows systems.
  • Use the CIS OVAL definition to assess vulnerable hosts.
  • Review legacy application dependencies that require old IE or VML.
  • Verify no general browsing occurs from vulnerable legacy systems.
Prepared
Confidence
medium
Sources
4

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

description · low confidence lookup

Execution behavior lookup

The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

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cve · low confidence lookup

CVE-2011-1266 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
3Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.