What is the CVSS score of CVE-2026-20405?

CVE-2026-20405 has a CVSS 3.1 base score of 6.5 (Medium). CVSS vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.1%.

Which versions of Nr17r are affected by CVE-2026-20405?

CVE-2026-20405 presents notable security risk rated CVSS 6.5. Exploitation could compromise the security of affected deployments.

How to fix or mitigate CVE-2026-20405?

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

Nr17r CVE-2026-20405

MEDIUM

Reachable Assertion (CWE-617)

2026-02-02 security@mediatek.com

Denial Of Service Nr17r Nr16 Nr15 Nr17

6.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

6.5 MEDIUM

AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Analysis Generated

Mar 12, 2026 - 22:01 vuln.today

CVE Published

Feb 02, 2026 - 09:15 nvd

MEDIUM 6.5

DescriptionCVE.org

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: MOLY01688495; Issue ID: MSV-4818.

AnalysisAI

A missing bounds check in the Modem component affecting Nr17r, Nr16, Nr15, and Nr17 devices enables remote denial of service attacks when a user connects to an attacker-controlled base station, causing system crashes without requiring user interaction or elevated privileges. The vulnerability allows unauthenticated attackers on the same network segment to crash affected devices remotely. No patch is currently available for this vulnerability.

Technical ContextAI

Classified as CWE-617 (Reachable Assertion). Affects Nr15. 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: MOLY01688495; Issue ID: MSV-4818.