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CVE-2021-38789

25
FAUCET Score

CVE-2021-38789 is an incorrect access control vulnerability in the Allwinner R818 SoC Android Q SDK V1.0, allowing a third-party application to modify system settings without proper permission checks. With a CVSS score of 7.5 (High), this vulnerability is easily exploitable over the network with low complexity and no user interaction, potentially leading to high integrity impact. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant media coverage, though it has received some community discussion on GitHub.

Impacted Technologies

VendorProductVersion(s)CPE
1.0CPE matchmatch criteria
cpe:2.3:a:allwinnertech:android_q_sdk:1.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.29%
Probability of exploitation in next 30 days
EPSS Percentile
67.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0129 is in the 47th percentile among its peer group of 51,551 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

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

github.com / pokerfacett/MY_CVE_CREDIT/blob/master/Allwinner%20R818%20SoC%EF%BC%9Aaw_display%20service%20has%20EoP%20Vulnerability.md
Broken Link
vul.wangan.com / a/CNVD-2021-46927
Third Party Advisory
allwinnertech.com / index.php
ProductVendor Advisory
cnvd.org.cn / flaw/show/CNVD-2021-46927
Third Party Advisory