CVE-2026-21548 Unisoc (Shanghai) Technologies Co., Ltd. CVE debrief

Who should care

Security teams and administrators responsible for systems using nr modem should be aware of this vulnerability and take necessary actions to mitigate potential risks. They should review the official CVE record and NVD detail page for CVE-2026-21548, and assign an owner for follow-up on affected product deployments in managed environments.

Technical summary

The CVE-2026-21548 vulnerability is related to a possible improper input validation in the nr modem. This could potentially lead to a remote denial of service with System execution privileges needed. The CVSS score for this vulnerability is 7.5, indicating a high severity level. The affected product context requires immediate attention due to its high CVSS score and potential for remote denial of service attacks.

Defensive priority

This CVE requires immediate attention due to its high CVSS score of 7.5 and potential for remote denial of service attacks.

Recommended defensive actions

• Verify the affected products and versions with the vendor
• Apply patches or updates provided by the vendor
• Monitor system logs for potential denial of service attempts
• Implement compensating controls to mitigate potential attacks
• Review compensating controls for exposed systems while remediation is scheduled and verified

Evidence notes

The CVE-2026-21548 record indicates a possible improper input validation in the nr modem, which could lead to a remote denial of service with System execution privileges needed. However, details are limited, and further verification is necessary to fully understand the vulnerability. The affected product or component is nr modem. To verify, defenders should review the official CVE record and NVD detail page for CVE-2026-21548, and check relevant monitoring, detection, and logs for exposed assets that need extra review.

Official resources