Vulnerability in Microsoft XML Core Services

CVE-2015-1646

Microsoft XML Core Services (aka MSXML) 3.0 allows remote attackers to bypass the Same Origin Policy and obtain sensitive information via a crafted DTD, aka "MSXML3 Same Origin Policy SFB Vulnerability."

Published 2015-04-14 · last modified 2026-06-17.

CVSS v2 metric

CVSS v2 base score 4.3 (Medium). Vector: AV:N/AC:M/Au:N/C:P/I:N/A:N. This CVE predates CVSS v3 and has no v3 score from NVD.

EPSS exploit prediction

EPSS: 0.169 (97.0th percentile), scored 2026-09-29.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 97.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.169 · newest: 0.169 · change: 0.000

Affected products

Microsoft XML Core Services — versions 3.0

Weakness classification (CWE)

CWE-264

References

docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-039 (vendor-advisory)
www.securitytracker.com/id/1032114 (vdb-entry)