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CVE-2021-0663

18
FAUCET Score

CVE-2021-0663 describes an out-of-bounds write vulnerability in the audio DSP of Google Android devices, stemming from an incorrect bounds check. This flaw could enable a local attacker to escalate privileges to System execution, requiring no user interaction. While the CVSS score is 6.7 (MEDIUM), indicating high impact on confidentiality, integrity, and availability, exploitation requires high privileges (PR:H). There is no evidence of active exploitation, publicly available exploit code, or inclusion in CISA's KEV catalog. Despite this, the vulnerability has garnered significant community discussion and media coverage, with reports suggesting it could impact a substantial percentage of Android smartphones.

Impacted Technologies

VendorProductVersion(s)CPE
9.0CPE matchmatch criteria
cpe:2.3:o:google:android:9.0:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:google:android:10.0:*:*:*:*:*:*:*
11.0CPE matchmatch criteria
cpe:2.3:o:google:android:11.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.7MEDIUM

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
0.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.56%
Probability of exploitation in next 30 days
EPSS Percentile
43.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0056 is in the 92nd percentile among its peer group of 3,720 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, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

corp.mediatek.com / product-security-bulletin/October-2021
Third Party Advisory