What is CVE-2015-6176?

CVE-2015-6176 is a vulnerability in Microsoft Edge, classified under Cross-site Scripting. Published 2015-12-09.

Is CVE-2015-6176 known to be exploited?

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

XSS in Microsoft Edge

CVE-2015-6176

Microsoft Edge mishandles HTML attributes in HTTP responses, which allows remote attackers to bypass a cross-site scripting (XSS) protection mechanism via unspecified vectors, aka "Microsoft Edge XSS Filter Bypass Vulnerability."

Vulnerability class: XSS (Cross-Site Scripting)

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

CVSS v2 metric

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

EPSS exploit prediction

EPSS: 0.140 (96.4th percentile), scored 2026-10-02.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 96.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.140 · newest: 0.140 · change: 0.000

Affected products

Microsoft Edge

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

ARPSyndicate/cve-scores

References

docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-125 (vendor-advisory)
www.securitytracker.com/id/1034316 (vdb-entry)

Frequently asked questions

What is CVE-2015-6176?: CVE-2015-6176 is a vulnerability in Microsoft Edge, classified under Cross-site Scripting. Published 2015-12-09.
Is CVE-2015-6176 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.