Is CVE-2015-6099 in the CISA KEV catalog?

No. CVE-2015-6099 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2015-6099?

CVE-2015-6099 has a CVSS v2 base score of 4.3 (MEDIUM).

What is the EPSS score for CVE-2015-6099?

CVE-2015-6099 has an EPSS score of 47.74% (99th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2015-6099

MEDIUMEPSS 99th pctl

4.3

CVSS v2

NVD

Description

Cross-site scripting (XSS) vulnerability in ASP.NET in Microsoft .NET Framework 4, 4.5, 4.5.1, 4.5.2, and 4.6 allows remote attackers to inject arbitrary web script or HTML via a crafted value, aka ".NET Elevation of Privilege Vulnerability."

CWE-79Cross-Site Scripting (XSS)

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

47.74%probability of exploitation in 30 days

99thpercentile

Very high risk: more likely to be exploited than 99% of all known CVEs.

References

http://packetstormsecurity.com/files/134314/Microsoft-.NET-Framework-XSS-Privilege-Escalation.html
http://www.securityfocus.com/archive/1/536875/100/0/threaded
http://www.securitytracker.com/id/1034116
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-118

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-06.