How severe is CVE-2020-0257?

CVE-2020-0257 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-0257 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-0257?

CVE-2020-0257 affects Google Android. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-0257?

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-2020-0257 published?

CVE-2020-0257 was published on 2020-08-11 and last updated on 2026-06-17.

CVE-2020-0257

CVE-2020-0257 is a high-severity vulnerability in Google Android with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 7.2
EPSS exploit prediction: 0% (8th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Google Android
Published: 2020-08-11
Last modified: 2026-06-17

Description

In SpecializeCommon of com_android_internal_os_Zygote.cpp, there is a permissions bypass due to an incomplete cleanup. This could lead to local escalation of privilege in isolated processes with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-10Android ID: A-156741968

Frequently asked questions

What is CVE-2020-0257?: In SpecializeCommon of com_android_internal_os_Zygote.cpp, there is a permissions bypass due to an incomplete cleanup. This could lead to local escalation of privilege in isolated processes with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-10Android ID: A-156741968
How severe is CVE-2020-0257?: CVE-2020-0257 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-0257 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-0257?: CVE-2020-0257 affects Google Android. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-0257?: 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-2020-0257 published?: CVE-2020-0257 was published on 2020-08-11 and last updated on 2026-06-17.

References

https://source.android.com/security/bulletin/2020-08-01

Affected products (1)

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

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