How severe is CVE-2021-0558?

CVE-2021-0558 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-0558 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-0558?

CVE-2021-0558 affects Google Android. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-0558?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-0558 published?

CVE-2021-0558 was published on 2021-06-22 and last updated on 2026-06-17.

CVE-2021-0558

CVE-2021-0558 is a medium-severity vulnerability in Google Android with a CVSS 3.x base score of 6.5. 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-125.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-125
Affected product: Google Android
Published: 2021-06-22
Last modified: 2026-06-17

Description

In fillMainDataBuf of pvmp3_framedecoder.cpp, there is a possible out of bounds read due to a heap buffer overflow. This could lead to remote information disclosure with no additional execution privileges needed. User interaction is needed for exploitation.Product: AndroidVersions: Android-11Android ID: A-173473906

Frequently asked questions

What is CVE-2021-0558?: In fillMainDataBuf of pvmp3_framedecoder.cpp, there is a possible out of bounds read due to a heap buffer overflow. This could lead to remote information disclosure with no additional execution privileges needed. User interaction is needed for exploitation.Product: AndroidVersions: Android-11Android ID: A-173473906
How severe is CVE-2021-0558?: CVE-2021-0558 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-0558 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-0558?: CVE-2021-0558 affects Google Android. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-0558?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-0558 published?: CVE-2021-0558 was published on 2021-06-22 and last updated on 2026-06-17.

References

https://source.android.com/security/bulletin/pixel/2021-06-01

Affected products (1)

cpe:2.3:o:google:android:11.0:*:*:*:*:*:*:*

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