CVE-2026-21553: CWE-20 Improper Input Validation in Unisoc (Shanghai) Technologies Co., Ltd. T8100/T9100/T8200/T8300
CVE-2026-21553 is a high-severity vulnerability in the modems of Unisoc (Shanghai) Technologies Co., Ltd. models T8100, T9100, T8200, and T8300. It involves improper input validation that could allow a remote attacker to cause a denial of service without requiring any privileges or user interaction.
AI Analysis
Technical Summary
This vulnerability, identified as CWE-20 (Improper Input Validation), exists in the modem components of Unisoc T8100, T9100, T8200, and T8300 devices. An attacker can remotely send crafted input that the modem fails to properly validate, leading to a denial of service condition. The CVSS 3.1 base score is 7.5, reflecting a network attack vector with low complexity, no privileges required, no user interaction, and impact limited to availability (denial of service). No information about patches or mitigations is currently available.
Potential Impact
Successful exploitation results in remote denial of service on affected modems, disrupting device availability. There is no impact on confidentiality or integrity, and no additional execution privileges are needed for exploitation.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, monitor vendor communications for updates. No specific mitigations are provided at this time.
CVE-2026-21553: CWE-20 Improper Input Validation in Unisoc (Shanghai) Technologies Co., Ltd. T8100/T9100/T8200/T8300
Description
CVE-2026-21553 is a high-severity vulnerability in the modems of Unisoc (Shanghai) Technologies Co., Ltd. models T8100, T9100, T8200, and T8300. It involves improper input validation that could allow a remote attacker to cause a denial of service without requiring any privileges or user interaction.
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), exists in the modem components of Unisoc T8100, T9100, T8200, and T8300 devices. An attacker can remotely send crafted input that the modem fails to properly validate, leading to a denial of service condition. The CVSS 3.1 base score is 7.5, reflecting a network attack vector with low complexity, no privileges required, no user interaction, and impact limited to availability (denial of service). No information about patches or mitigations is currently available.
Potential Impact
Successful exploitation results in remote denial of service on affected modems, disrupting device availability. There is no impact on confidentiality or integrity, and no additional execution privileges are needed for exploitation.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, monitor vendor communications for updates. No specific mitigations are provided at this time.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Unisoc
- Date Reserved
- 2025-12-31T07:33:23.121Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a704b63bf32cb7a3433eb46
Added to database: 08/03/2026, 08:03:47 UTC
Last enriched: 08/10/2026, 15:21:50 UTC
Last updated: 09/17/2026, 22:01:33 UTC
Views: 55
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