CVE-2012-1889

Microsoft XML Core Services 3.0, 4.0, 5.0, and 6.0 accesses uninitialized memory locations, which...

8.8 HighIn KEVPublic exploit

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: Required

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

83.5%Down 8.8 points since Feb 4, 2022

What each source reports

NVD Score used 8.8

Record: CVE-2012-1889
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 2.0: 9.3 HighAV:N/AC:M/Au:N/C:C/I:C/A:C
Weakness: CWE-787
Updated: 2026-11-02

CVE List 8.8

Record: CVE-2012-1889
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness: CWE-787
Updated: 2026-11-02

EUVDEUVD-2012-1899 8.8

Record: EUVD-2012-1899
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-hv88-2gcv-6mjq 8.8

Microsoft XML Core Services 3.0, 4.0, 5.0, and 6.0 accesses uninitialized memory locations, which...

Record: GHSA-hv88-2gcv-6mjq
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness: CWE-119, CWE-787
Updated: 2026-11-02

CISA KEV No score

Microsoft XML Core Services Memory Corruption Vulnerability

Microsoft XML Core Services contains a memory corruption vulnerability which could allow for remote code execution.

Record: CVE-2012-1889
Weakness: CWE-119
Updated: 2026-11-02

Affected products

microsoft xml core services

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
Metasploit	MS12-043 Microsoft XML Core Services MSXML Uninitialized Memory Corruption	2012-06-12
Exploit-DB	Microsoft XML Core Services - MSXML Uninitialized Memory Corruption (MS12-043) (Metasploit)	2012-06-16
PoC in GitHub	whu-enjoy/CVE-2012-1889	2016-09-25
PoC in GitHub	l-iberty/cve-2012-1889	2019-11-20

History

History
Recorded	Changed	Sources
Nov 3, 2026	exploitation, exploits
Nov 2, 2026	first indexed	CVE List, EUVD, Exploit-DB, GitHub Advisories, CISA KEV, Metasploit, NVD, PoC in GitHub

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2012-1889 is a high vulnerability (CVSS 8.8) in Microsoft Xml Core Services, published June 13, 2012. CISA lists it as known to be exploited, since June 8, 2022. EUVD reports exploitation since June 8, 2022. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 83.5%, the 99th percentile. No source names a fixed version.