How severe is CVE-2015-6621?

CVE-2015-6621 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2015-6621 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-6621?

CVE-2015-6621 primarily affects Google Android. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-6621?

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

When was CVE-2015-6621 published?

CVE-2015-6621 was published on 2015-12-08 and last updated on 2026-06-17.

CVE-2015-6621

CVE-2015-6621 is a critical-severity vulnerability in Google Android with a CVSS 2.0 base score of 9.3. 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-264.

Key facts

Severity: Critical (CVSS 2.0 base score 9.3)
EPSS exploit prediction: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Google Android
Published: 2015-12-08
Last modified: 2026-06-17

Description

SystemUI in Android 5.x before 5.1.1 LMY48Z and 6.0 before 2015-12-01 allows attackers to gain privileges via a crafted application, as demonstrated by obtaining Signature or SignatureOrSystem access, aka internal bug 23909438.

Frequently asked questions

What is CVE-2015-6621?: SystemUI in Android 5.x before 5.1.1 LMY48Z and 6.0 before 2015-12-01 allows attackers to gain privileges via a crafted application, as demonstrated by obtaining Signature or SignatureOrSystem access, aka internal bug 23909438.
How severe is CVE-2015-6621?: CVE-2015-6621 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2015-6621 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-6621?: CVE-2015-6621 primarily affects Google Android. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2015-6621?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2015-6621 published?: CVE-2015-6621 was published on 2015-12-08 and last updated on 2026-06-17.

References

http://source.android.com/security/bulletin/2015-12-01.html

Affected products (3)

cpe:2.3:o:google:android:5.0:*:*:*:*:*:*:*
cpe:2.3:o:google:android:5.1:*:*:*:*:*:*:*
cpe:2.3:o:google:android:6.0:*:*:*:*:*:*:*

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