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CriticalVulnerabilityCVE-2026-112352updated 27 Oct 2026, 20:21 UTC

Sunhillo SureLine web login can be bypassed with a forged cookie

Someone on the network could fake a login cookie by simply typing a username into it, and then act as that user. Because the flaw can lead to full control of the system, it is very serious.

Fixed in Sunhillo SureLine 9.1.5 or laterOfficial source
SeverityCriticalCVSS 9.1 of 10
Being exploited?UnclearNo reports either way yet
Fix available?YesSunhillo SureLine 9.1.5 or later · since 27 Oct 2026
How sure is this?Official sourceBacked by an official source

How the attack works simplified

  1. 1Attacker guesses usernameDefault names like Admin are common
  2. 2Forged cookie sentCookie contains only plain username
  3. 3Login check accepts itcheckLogin trusts the cookie
  4. 4Diagnostic command runsnetworkDiag.cgi reached as user
  5. 5Root access gainedCommand execution escalates to root
  6. ResultAttacker controls the device as root

What happened

Sunhillo SureLine versions before 9.1.5 use a session cookie that contains only a cleartext username, with no random identifier or integrity protection. The checkLogin function in libwebcmn.so and the networkDiag.cgi script accept this forged cookie, allowing authentication bypass that chains into root command execution.

Why it is dangerous: An unauthenticated remote attacker can impersonate any user with an active web session, including guessable default accounts such as Admin or sftp_user, and can reach root-level command execution on the device.

Are you affected?

You are affected if you run Sunhillo SureLine older than 9.1.5 with its web interface reachable by an attacker.

Sunhillo SureLine, all versions before 9.1.5

What to do

  1. Update Sunhillo SureLine to version 9.1.5 or later
  2. Restrict access to the SureLine web interface to trusted networks only until patched
  3. Change default account names and passwords such as Admin and sftp_user
  4. Review logs for unexpected logins or networkDiag.cgi requests

Timeline

  1. 27 Oct 2026, 20:17 UTC
    Publicly disclosed
  2. 27 Oct 2026, 20:17 UTC
    Reported by NVD · NVD
  3. 27 Oct 2026, 20:21 UTC
    Picked up by Zero Radar

Sources 1 report, oldest first

Official vendor, government CERT or advisory database

Technical details

ID
CVE-2026-112352
CVSS
9.1 / 10
EPSS
1.3% chance of exploitation within 30 days
Disclosed
27 Oct 2026, 20:17 UTC
On Zero Radar
27 Oct 2026, 20:21 UTC (4 min after disclosure)
Last change
27 Oct 2026, 20:21 UTC

The plain-language parts and the attack diagram were written by an AI model (anthropic/claude-haiku-5.5) from the sources above. Facts like versions, exploitation and dates come from the sources themselves. How Zero Radar works

Sunhillo SureLine web login can be bypassed with a forged cookie · Zero Radar