EUVD-2026-73977
GHSA-q584-w9q9-2fgr
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local attack vector via installed app (AV:L), low privilege required for installation (PR:L); total C/I/A impact because unrestricted USSD access enables carrier-level device operations.
Primary rating from Vendor (android).
CVSS VectorVendor: android
Lifecycle Timeline
6DescriptionCVE.org
In handleUssdRequest of PhoneInterfaceManager.java, there is a possible way to send a USSD request without permission due to a logic error in the code. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.
AnalysisAI
Local privilege escalation in Android's telephony stack allows a low-privilege app to send USSD requests without the required telephony permission, bypassing Android's permission model through a logic error in handleUssdRequest of PhoneInterfaceManager.java. Affected releases span Android 14 through 17 including the 16-QPR2 branch, with no user interaction required post-installation. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a malicious app to be installed on the target Android device - the attacker must hold at minimum standard app-installation-level privileges on the device (CVSS PR:L, AV:L). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.8 High vector (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) accurately captures a realistic local attack: a malicious app with only baseline installation-level privileges can reach the vulnerable code path with no user interaction and no elevated access. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply patches from the Android Security Bulletin for September 2026 (https://source.android.com/docs/security/bulletin/2026/2026-09-01) by updating devices to a security patch level of 2026-09-01 or later; exact OEM build numbers vary by manufacturer and must be verified via each OEM's release notes or device settings. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Android 14, 15, 16-QPR2, and 17 devices and assess exposure based on app-installation policies and user behavior. …
Sign in for detailed remediation steps and compensating controls.
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Same weakness CWE-693 – Protection Mechanism Failure
View allSame technique Privilege Escalation
View allShare
External POC / Exploit Code
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