What is CVE-2015-6164?

CVE-2015-6164 is a vulnerability in Microsoft Internet Explorer, classified under Improper Input Validation. Published 2015-12-09.

Is CVE-2015-6164 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Improper input validation in Microsoft Internet Explorer

CVE-2015-6164

Microsoft Internet Explorer 9 through 11 improperly implements a cross-site scripting (XSS) protection mechanism, which allows remote attackers to bypass the Same Origin Policy via a crafted web site, aka "Internet Explorer XSS Filter Bypass Vulnerability."

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2015-12-09 · last modified 2026-06-17.

CVSS v2 metric

CVSS v2 base score 6.8 (Medium). Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P. This CVE predates CVSS v3 and has no v3 score from NVD.

EPSS exploit prediction

EPSS: 0.117 (95.9th percentile), scored 2026-10-02.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 95.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.117 · newest: 0.117 · change: 0.000

Affected products

Microsoft Internet Explorer — versions 9, 10, 11

Weakness classification (CWE)

CWE-20 — Improper Input Validation

Public proof-of-concept exploits

ARPSyndicate/cve-scores

References

www.securitytracker.com/id/1034315 (vdb-entry)
docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-124 (vendor-advisory)

Frequently asked questions

What is CVE-2015-6164?: CVE-2015-6164 is a vulnerability in Microsoft Internet Explorer, classified under Improper Input Validation. Published 2015-12-09.
Is CVE-2015-6164 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.