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CVE-2015-6639

37
FAUCET Score

CVE-2015-6639 is a privilege escalation vulnerability affecting the Widevine QSEE TrustZone application in Android 5.x and 6.0, allowing a crafted application to gain elevated privileges. With a CVSS score of 7.8 (HIGH), it requires user interaction (UI:R) but has low attack complexity (AC:L), leading to high impacts on confidentiality, integrity, and availability (C:H/I:H/A:H). While not listed in CISA KEV, an exploit (EDB-39757) exists, and it has garnered significant community discussion and media coverage, indicating its potential for exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
5.0CPE matchmatch criteria
cpe:2.3:o:google:android:5.0:*:*:*:*:*:*:*
5.1.1CPE matchmatch criteria
cpe:2.3:o:google:android:5.1.1:*:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:o:google:android:6.0:*:*:*:*:*:*:*
6.0.1CPE matchmatch criteria
cpe:2.3:o:google:android:6.0.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.8HIGH

CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
6.91%
Probability of exploitation in next 30 days
EPSS Percentile
93.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
ExploitDB: EDB-39757 · May 2, 2016
This CVE's current EPSS score of 0.0691 is in the 94th percentile among its peer group of 11,621 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

googlevendor investigatingvia nvd_reference
View patch

References

packetstormsecurity.com / files/172637/Widevine-Trustlet-5.x-6.x-7.x-PRDiagVerifyProvisioning-Buffer-Overflow.html
seclists.org / fulldisclosure/2023/May/26
source.android.com / security/bulletin/2016-01-01.html
Vendor Advisory
exploit-db.com / exploits/39757
securitytracker.com / id/1034592