CVE-2026-21549: CWE-20 Improper Input Validation in Unisoc (Shanghai) Technologies Co., Ltd. T8100/T9100/T8200/T8300
CVE-2026-21549 is a high-severity vulnerability in Unisoc (Shanghai) Technologies Co., Ltd. modem products T8100, T9100, T8200, and T8300. It involves improper input validation that could lead to a remote denial of service (DoS) without requiring any additional execution privileges. No confidentiality or integrity impact is indicated. No patch or official remediation guidance is currently available.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-21549) affects Unisoc modem products T8100, T9100, T8200, and T8300. It stems from improper input validation in the modem component, which can be exploited remotely to cause a denial of service condition. The CVSS 3.1 base score is 7.5, reflecting high severity due to the network attack vector, low attack complexity, no privileges required, no user interaction, and impact limited to availability. There is no indication of known exploits in the wild or any vendor-provided patch or mitigation at this time.
Potential Impact
An attacker can remotely trigger a denial of service on affected Unisoc modem devices without needing any privileges or user interaction. The vulnerability does not affect confidentiality or integrity but impacts availability by causing service disruption.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or mitigation has been published by Unisoc as of now.
CVE-2026-21549: CWE-20 Improper Input Validation in Unisoc (Shanghai) Technologies Co., Ltd. T8100/T9100/T8200/T8300
Description
CVE-2026-21549 is a high-severity vulnerability in Unisoc (Shanghai) Technologies Co., Ltd. modem products T8100, T9100, T8200, and T8300. It involves improper input validation that could lead to a remote denial of service (DoS) without requiring any additional execution privileges. No confidentiality or integrity impact is indicated. No patch or official remediation guidance is currently available.
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 (CVE-2026-21549) affects Unisoc modem products T8100, T9100, T8200, and T8300. It stems from improper input validation in the modem component, which can be exploited remotely to cause a denial of service condition. The CVSS 3.1 base score is 7.5, reflecting high severity due to the network attack vector, low attack complexity, no privileges required, no user interaction, and impact limited to availability. There is no indication of known exploits in the wild or any vendor-provided patch or mitigation at this time.
Potential Impact
An attacker can remotely trigger a denial of service on affected Unisoc modem devices without needing any privileges or user interaction. The vulnerability does not affect confidentiality or integrity but impacts availability by causing service disruption.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or mitigation has been published by Unisoc as of now.
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: 6a704b62bf32cb7a3433eb0f
Added to database: 08/03/2026, 08:03:46 UTC
Last enriched: 08/10/2026, 15:18:36 UTC
Last updated: 09/17/2026, 22:01:33 UTC
Views: 35
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