CVE-2021-0653
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In enqueueNotification of NetworkPolicyManagerService.java, there is a possible way to retrieve a trackable identifier due to a missing permission check. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-10 Android-11 Android-9Android ID: A-177931370
Rainforest analyst review
A missing permission check in Android's NetworkPolicyManagerService lets a local app retrieve a trackable identifier it shouldn't be able to read. No user interaction is needed, but the reach is local and the impact is confined to information disclosure, specifically a privacy-relevant identifier.
This is a low-severity, privacy-flavored issue. The concern is an on-device app obtaining a stable identifier usable for tracking, not an attacker gaining control or exfiltrating broad data. It's a boundary violation worth closing, but not one that opens the device up.
We rank it down accordingly and fold it into mobile patch-level management across the affected Android 9, 10, and 11 builds. The framing we use is privacy hygiene, ensuring apps can't quietly harvest a trackable ID, rather than a security incident.
References
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Frequently asked questions
What is CVE-2021-0653?
In enqueueNotification of NetworkPolicyManagerService.java, there is a possible way to retrieve a trackable identifier due to a missing permission check. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-10 Android-11 Android-9Android ID: A-177931370
How severe is CVE-2021-0653?
CVE-2021-0653 carries a CVSS 3.1 base score of 5.5, rated medium. On the Rainforest Risk Index — which weighs the severity alongside how easy the flaw is to reach and how broad its impact is — it scores 49 out of 100, in the moderate band.
How is CVE-2021-0653 exploited?
According to the CVSS vector (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N): attack vector Local, attack complexity Low, privileges required Low, user interaction None. Impact on confidentiality High, integrity None and availability None.
Which products are affected by CVE-2021-0653?
Public advisories list the following as affected: android. Check the references on this page for the exact versions each vendor confirms.
How do I fix CVE-2021-0653?
Apply the fix the vendor published — the references on this page link to the primary advisories and patches. When patching can't happen right away, reduce the exposure of the affected component and watch it for exploitation attempts. Rainforest customers see this vulnerability correlated to their own assets and prioritized by real exposure, not by score alone.
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