CVE-2026-21551

Unisoc Modem Denial of Service via Improper Input Validation

Published Aug 3, 2026 CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Description
In modem, there is a possible improper input validation. This could lead to remote denial of service with no additional execution privileges needed

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Unisoc
Unisoc t8100
Unisoc t8200
Unisoc t8300
Unisoc t9100
Vendors & Products Unisoc
Unisoc t8100
Unisoc t8200
Unisoc t8300
Unisoc t9100
Type Values Removed Values Added
Title Unisoc Modem Denial of Service via Improper Input Validation
Type Values Removed Values Added
Weaknesses CWE-20
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description In modem, there is a possible improper input validation. This could lead to remote denial of service with no additional execution privileges needed
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Unisoc
Published
Updated
Aug 3, 2026, 2:20 PM
Reserved
Dec 31, 2025, 7:33 AM
Status
Deferred
Published
Aug 3, 2026, 8:17 AM
Modified
Oct 23, 2026, 10:10 PM