How severe is CVE-2021-0517?

CVE-2021-0517 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-2021-0517 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-0517?

CVE-2021-0517 affects Google Android. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-0517?

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-2021-0517 published?

CVE-2021-0517 was published on 2021-06-21 and last updated on 2026-06-17.

CVE-2021-0517

CVE-2021-0517 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-670.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (52nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-670
Affected product: Google Android
Published: 2021-06-21
Last modified: 2026-06-17

Description

In updateCapabilities of ConnectivityService.java, there is a possible incorrect network state determination due to a logic error in the code. This could lead to biasing of networking tasks to occur on non-VPN networks, which could lead to remote information disclosure, with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-11Android ID: A-179053823

Frequently asked questions

What is CVE-2021-0517?: In updateCapabilities of ConnectivityService.java, there is a possible incorrect network state determination due to a logic error in the code. This could lead to biasing of networking tasks to occur on non-VPN networks, which could lead to remote information disclosure, with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-11Android ID: A-179053823
How severe is CVE-2021-0517?: CVE-2021-0517 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-2021-0517 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-0517?: CVE-2021-0517 affects Google Android. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-0517?: 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-2021-0517 published?: CVE-2021-0517 was published on 2021-06-21 and last updated on 2026-06-17.

References

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

Affected products (1)

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

More vulnerabilities in Google Android

CVE-2026-0092 — Critical (CVSS 10.0): In Package Manager, there is a possible device lock controller bypass due to a missing permission check. This could…
CVE-2025-48611 — Critical (CVSS 10.0): In DeviceId of DeviceId.java, there is a possible desync in persistence due to a missing bounds check. This could lead…
CVE-2015-8073 — Critical (CVSS 10.0): mediaserver in Android 4.4 and 5.1 before 5.1.1 LMY48X allows remote attackers to execute arbitrary code or cause a…
CVE-2015-8072 — Critical (CVSS 10.0): mediaserver in Android 4.4 through 5.x before 5.1.1 LMY48X and 6.0 before 2015-11-01 allows remote attackers to execute…
CVE-2015-6610 — Critical (CVSS 10.0): libstagefright in Android before 5.1.1 LMY48X and 6.0 before 2015-11-01 allows attackers to gain privileges or cause a…
CVE-2015-6609 — Critical (CVSS 10.0): libutils in Android before 5.1.1 LMY48X and 6.0 before 2015-11-01 allows remote attackers to execute arbitrary code or…

All CVEs affecting Google Android →

Other CWE-670 vulnerabilities

CVE-2025-43359 — Critical (CVSS 9.8): A logic issue was addressed with improved state management. This issue is fixed in iOS 18.7 and iPadOS 18.7, iOS 26 and…
CVE-2022-25745 — Critical (CVSS 9.8): Memory corruption in modem due to improper input validation while handling the incoming CoAP message
CVE-2020-1914 — Critical (CVSS 9.8): A logic vulnerability when handling the SaveGeneratorLong instruction in Facebook Hermes prior to commit…
CVE-2020-17466 — Critical (CVSS 9.8): Turcom TRCwifiZone through 2020-08-10 allows authentication bypass by visiting manage/control.php and ignoring 302…
CVE-2019-17192 — Critical (CVSS 9.8): The WebRTC component in the Signal Private Messenger application through 4.47.7 for Android processes videoconferencing…
CVE-2026-55276 — Critical (CVSS 9.1): Always-Incorrect Control Flow Implementation vulnerability in Apache Tomcat meant that special roles and empty…

Browse all CWE-670 vulnerabilities →