---
id: CVE-2026-80335
title: Out-of-bounds Write in Bootloader
summary: >-
  Memory Corruption when processing firmware update data in Download mode due to
  a missing bounds check.
severity: high
cvss: 8.4
cvssVector: 'CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-787
vendor: 'Unisoc (Shanghai) Technologies Co., Ltd.'
product: Bootloader
affected:
  - Bootloader SC9863A
  - Bootloader SC9832E
  - Bootloader SC7731E
  - Bootloader T310
  - Bootloader T610
  - Bootloader T618
  - Bootloader T7200
  - Bootloader T7225
  - Bootloader T7250
  - Bootloader T7255
  - Bootloader T7280
  - Bootloader T8100
  - Bootloader T9100
  - Bootloader T8200
  - Bootloader T7300
  - Bootloader T8300
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-11-04T14:53:39.348855Z'
published: '2026-11-04'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T07:01:13.075Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-80335'
references:
  - url: >-
      https://www.unisoc.com/en/support/product-security-bulletin/2117823464494759937
tags:
  - cve.org
epss: 0.00266
epssPercentile: 0.18661
ingestedAt: '2026-11-05T21:36:00.796Z'
---

## Overview

Memory Corruption when processing firmware update data in Download mode due to a missing bounds check.

## Affected

- `Bootloader SC9863A`
- `Bootloader SC9832E`
- `Bootloader SC7731E`
- `Bootloader T310`
- `Bootloader T610`
- `Bootloader T618`
- `Bootloader T7200`
- `Bootloader T7225`
- `Bootloader T7250`
- `Bootloader T7255`
- `Bootloader T7280`
- `Bootloader T8100`
- `Bootloader T9100`
- `Bootloader T8200`
- `Bootloader T7300`
- `Bootloader T8300`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.