# CVE-2012-1889: Microsoft XML Core Services Memory Corruption Vulnerability

Source: https://junglewise.ai/threats/cve-2012-1889-microsoft-xml-core-services-memory-corruption-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2022-06-08. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2012-1889 · Severity: critical · CVSS 8.8 · Exploited in the wild · Published 2022-06-08

Microsoft XML Core Services (MSXML) versions 3.0 through 6.0 contain a memory corruption vulnerability due to improper access of uninitialized memory locations. A remote attacker can exploit this by enticing a user to visit a specially crafted website, leading to arbitrary code execution or a denial of service.

Technologies: [Microsoft XML Core Services](https://junglewise.ai/threats/technologies/xml-core-services). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2012-1889 exploited in the wild?** Yes. CVE-2012-1889 is known to be exploited in the wild, first recorded on 8 June 2022. Treat it as urgent.

**How severe is CVE-2012-1889?** Critical severity, with a CVSS score of 8.8, published 8 June 2022.

**Which products and versions are affected?** Microsoft XML Core Services 3.0, 4.0, 5.0, 6.0.

**Is there a fix for CVE-2012-1889?** A patch was published on 2012-07-10: Microsoft Security Bulletin MS12-043 released Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2012-1889 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2012-1889?** Check whether you run Microsoft XML Core Services. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Microsoft XML Core Services 3.0, 4.0, 5.0, 6.0

## Timeline

- 2012-06-12: advisory: Microsoft Security Advisory 2719615 published
- 2012-07-10: patched: Microsoft Security Bulletin MS12-043 released
- 2022-06-08: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
- 2022-06-08: exploited: Confirmed exploited in the wild per CISA KEV entry

## Related threats

- [Microsoft XML Core Services use after free privilege escalation](https://junglewise.ai/threats/cve-2026-50359-microsoft-xml-core-services-use-after-free-privilege-escalation)
- [Microsoft XML Core Services Information Disclosure Vulnerability](https://junglewise.ai/threats/cve-2017-0022-microsoft-xml-core-services-information-disclosure-vulnerability)