---
id: CVE-2026-112352
title: Sunhillo SureLine Authentication Bypass via Session Cookie
summary: >-
  Sunhillo SureLine before 9.1.5 contains an authentication bypass vulnerability
  that allows an unauthenticated remote attacker to impersonate any user with an
  active web session by forging a session cookie containing only a cleartext
  user…
severity: critical
cvss: 9.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'
cvssSource: cna
cwe:
  - CWE-565
vendor: Sunhillo Corporation
product: SureLine
affected:
  - SureLine >= 8.0.0 < 9.1.5
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-28T14:58:19.702469Z'
published: '2026-10-27'
updated: '2026-10-28'
sourceUpdated: '2026-10-28T16:13:31.837Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-112352'
references:
  - url: 'https://www.sunhillo.com/product/sureline/'
    label: Product Webpage
  - url: >-
      https://www.vulncheck.com/advisories/sunhillo-sureline-authentication-bypass-via-session-cookie
    label: >-
      VulnCheck Advisory: Sunhillo SureLine Authentication Bypass via Session
      Cookie
tags:
  - cve.org
epss: 0.01319
epssPercentile: 0.70722
ingestedAt: '2026-10-27T19:54:27.799Z'
---

## Overview

Sunhillo SureLine before 9.1.5 contains an authentication bypass vulnerability that allows an unauthenticated remote attacker to impersonate any user with an active web session by forging a session cookie containing only a cleartext username with no random identifier or integrity protection. Attackers can guess default account names such as Admin or sftp_user and submit a forged username cookie to satisfy the login check in checkLogin (libwebcmn.so) and networkDiag.cgi, chaining into root command execution.

## Affected

- `SureLine >= 8.0.0 < 9.1.5`

## Remediation

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