CVE-2026-20403

MEDIUM
2026-02-02 [email protected]
6.5
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

2
Analysis Generated
Mar 12, 2026 - 22:01 vuln.today
CVE Published
Feb 02, 2026 - 09:15 nvd
MEDIUM 6.5

Tags

Denial Of Service Nr15 Nr16 Nr17 Nr17r

Description

In Modem, there is a possible system crash due to a missing bounds check. This could lead to remote denial of service, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: MOLY01689254 (Note: For N15 and NR16) / MOLY01689259 (Note: For NR17 and NR17R); Issue ID: MSV-4843.

Analysis

Modem firmware versions Nr15, Nr16, Nr17, and Nr17r are susceptible to denial of service attacks due to insufficient bounds checking in memory operations. An attacker controlling a rogue base station can trigger a system crash on connected devices without requiring authentication or user interaction. …

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Remediation

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

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Priority Score

33
Low Medium High Critical
KEV: 0
EPSS: +0.1
CVSS: +32
POC: 0

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CVE-2026-20403 vulnerability details – vuln.today
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