What is the CVSS score of CVE-2012-1889?

CVE-2012-1889 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. EPSS exploitation probability: 92.9%.

Which versions of Microsoft are affected by CVE-2012-1889?

CVE-2012-1889 presents significant security risk, a out-of-bounds write vulnerability rated CVSS 8.8.. A patch is available.

Is there a public PoC exploit available for CVE-2012-1889?

Yes, a public proof-of-concept exploit is available for CVE-2012-1889. Prioritise patching immediately. EPSS: 92.9%.

How to fix or mitigate CVE-2012-1889?

Within 24 hours: Identify all affected systems and apply vendor patches immediately. If patching is delayed, consider network segmentation to limit exposure.

Microsoft CVE-2012-1889

HIGH

Out-of-bounds Write (CWE-787)

2012-06-13 secure@microsoft.com

Buffer Overflow Memory Corruption Denial Of Service RCE Microsoft

8.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

8.8 HIGH

AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Re-analysis Queued

Apr 21, 2026 - 15:22 vuln.today

cvss_changed

Analysis Generated

Mar 26, 2026 - 11:18 vuln.today

Added to CISA KEV

Oct 22, 2025 - 01:15 cisa

CISA KEV

PoC Detected

Oct 22, 2025 - 01:15 vuln.today

Public exploit code

Patch released

Oct 22, 2025 - 01:15 nvd

Patch available

CVE Published

Jun 13, 2012 - 04:46 nvd

HIGH 8.8

DescriptionCVE.org

Microsoft XML Core Services 3.0, 4.0, 5.0, and 6.0 accesses uninitialized memory locations, which allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site.

AnalysisAI

Microsoft XML Core Services 3.0 through 6.0 access uninitialized memory locations, allowing remote attackers to execute code or cause memory corruption through a crafted website, actively exploited before patch availability.

Technical ContextAI

The CWE-787 vulnerability occurs when MSXML fails to properly initialize memory locations before use during XML document parsing. Attackers can trigger the uninitialized memory access through a crafted webpage, allowing them to control the contents of the uninitialized memory to achieve code execution.