Nr17
CVE-2026-20434
HIGH
Severity by source
AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
In Modem, there is a possible out of bounds write due to a missing bounds check. This could lead to remote escalation of privilege, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges needed. User interaction is needed for exploitation. Patch ID: MOLY00782946; Issue ID: MSV-4135.
AnalysisAI
Privilege escalation in Modem affects Nr17, Lr13, Nr16, Lr12a, and Nr15 devices through an out-of-bounds write vulnerability triggered when connecting to a rogue base station. An attacker controlling a malicious base station can achieve remote code execution and full system compromise without requiring additional privileges or user interaction beyond initial network connection. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Target device must connect to attacker-controlled rogue base station broadcasting crafted modem signals; modem must lack bounds checking on received transmission data; user action of connecting to rogue station required. Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 7.5 (HIGH). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | A remote attacker could exploit this vulnerability to remote escalation of privilege, if a UE has connected to a rogue base station co. |
| Remediation | Monitor vendor advisories for a patch. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Inventory all devices with affected modems and assess business criticality. …
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External POC / Exploit Code
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