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CVE-2015-6095

16
FAUCET Score

CVE-2015-6095 describes a Kerberos security feature bypass in multiple versions of Microsoft Windows, including Vista, Windows 7, 8, 8.1, 10, and Server editions. This vulnerability, with a CVSS score of 4.9 (AV:L/AC:L/Au:N/C:N/I:C/A:N), allows physically proximate attackers to bypass authentication and conduct decryption attacks against BitLocker by connecting to an unintended Key Distribution Center. While the vulnerability has a low EPSS score and no known public exploits in Metasploit or ExploitDB, it has garnered significant media attention with two articles and two community mentions. The "Malicious Butler" attack, as it was dubbed, highlights the potential for a physically present attacker to exploit this flaw.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_10:-:*:*:*:*:*:*:*
1511CPE matchmatch criteria
cpe:2.3:o:microsoft:windows_10:1511:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_7:-:sp1:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_8:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.9MEDIUM

AV:L/AC:L/Au:N/C:N/I:C/A:N

Confidentiality Impact
NONE
Integrity Impact
COMPLETE
Availability Impact
NONE
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Exploitability Score
3.9
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
4.00%
Probability of exploitation in next 30 days
EPSS Percentile
89.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0400 is in the 99th percentile among its peer group of 3,052 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

docs.microsoft.com / en-us/security-updates/securitybulletins/2015/ms15-122
PatchVendor Advisory
securitytracker.com / id/1034125
Third Party AdvisoryVDB Entry