How severe is CVE-2021-0466?

CVE-2021-0466 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-0466 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-0466?

CVE-2021-0466 affects Google Android. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-0466?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-0466 published?

CVE-2021-0466 was published on 2021-06-11 and last updated on 2026-06-17.

CVE-2021-0466

CVE-2021-0466 is a high-severity vulnerability in Google Android with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-330.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (70th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-330
Affected product: Google Android
Published: 2021-06-11
Last modified: 2026-06-17

Description

In startIpClient of ClientModeImpl.java, there is a possible identifier which could be used to track a device. This could lead to remote information disclosure to a proximal attacker, with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-10Android ID: A-154114734

Frequently asked questions

What is CVE-2021-0466?: In startIpClient of ClientModeImpl.java, there is a possible identifier which could be used to track a device. This could lead to remote information disclosure to a proximal attacker, with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-10Android ID: A-154114734
How severe is CVE-2021-0466?: CVE-2021-0466 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-0466 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-0466?: CVE-2021-0466 affects Google Android. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-0466?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-0466 published?: CVE-2021-0466 was published on 2021-06-11 and last updated on 2026-06-17.

References

https://source.android.com/security/bulletin/2021-05-01

Affected products (1)

cpe:2.3:o:google:android:10.0:*:*:*:*:*:*:*

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