CVE-2026-21548: CWE-20 Improper Input Validation in Unisoc (Shanghai) Technologies Co., Ltd. T8100/T9100/T8200/T8300
CVE-2026-21548 is a high-severity vulnerability in Unisoc (Shanghai) Technologies Co., Ltd. modem products T8100, T9100, T8200, and T8300. It involves improper input validation in the NR modem component, which could allow a remote attacker to cause a denial of service without requiring user interaction or privileges. The vulnerability does not impact confidentiality or integrity but can disrupt availability by causing a system crash or reboot.
AI Analysis
Technical Summary
This vulnerability, identified as CWE-20 (Improper Input Validation), affects the NR modem in Unisoc's T8100, T9100, T8200, and T8300 products. An attacker can remotely send crafted input that the modem fails to properly validate, leading to a denial of service condition. The attack requires no privileges or user interaction and impacts system availability by causing a crash or reboot. The CVSS 3.1 base score is 7.5, reflecting network attack vector, low attack complexity, no privileges required, no user interaction, and impact limited to availability.
Potential Impact
The vulnerability allows remote attackers to cause a denial of service on affected devices, potentially disrupting normal operation. There is no impact on confidentiality or integrity. System execution privileges are not required to exploit this issue, increasing the risk of remote disruption.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or workaround information is currently available. Monitor Unisoc's advisories for updates and apply any patches once released.
CVE-2026-21548: CWE-20 Improper Input Validation in Unisoc (Shanghai) Technologies Co., Ltd. T8100/T9100/T8200/T8300
Description
CVE-2026-21548 is a high-severity vulnerability in Unisoc (Shanghai) Technologies Co., Ltd. modem products T8100, T9100, T8200, and T8300. It involves improper input validation in the NR modem component, which could allow a remote attacker to cause a denial of service without requiring user interaction or privileges. The vulnerability does not impact confidentiality or integrity but can disrupt availability by causing a system crash or reboot.
CVSS v3.1
Score 7.5high
Affected software
Unisoc (Shanghai) Technologies Co., Ltd.
T8100/T9100/T8200/T8300
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, identified as CWE-20 (Improper Input Validation), affects the NR modem in Unisoc's T8100, T9100, T8200, and T8300 products. An attacker can remotely send crafted input that the modem fails to properly validate, leading to a denial of service condition. The attack requires no privileges or user interaction and impacts system availability by causing a crash or reboot. The CVSS 3.1 base score is 7.5, reflecting network attack vector, low attack complexity, no privileges required, no user interaction, and impact limited to availability.
Potential Impact
The vulnerability allows remote attackers to cause a denial of service on affected devices, potentially disrupting normal operation. There is no impact on confidentiality or integrity. System execution privileges are not required to exploit this issue, increasing the risk of remote disruption.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or workaround information is currently available. Monitor Unisoc's advisories for updates and apply any patches once released.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Unisoc
- Date Reserved
- 2025-12-31T07:33:23.119Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a704b62bf32cb7a3433eb0c
Added to database: 08/03/2026, 08:03:46 UTC
Last enriched: 08/10/2026, 15:18:27 UTC
Last updated: 09/17/2026, 22:01:33 UTC
Views: 30
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