CVE-2026-112352

CRITICAL 9.1

Sunhillo SureLine Authentication Bypass via Session Cookie

CVSS Score

9.1

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-565
Vendor	sunhillo corporation
Product	sureline
Published	Oct 27, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Affected Versions

Sunhillo Corporation / SureLine

8.0.0 < 9.1.5

References

NVD ↗ CVE.org ↗ EPSS Data ↗

sunhillo.com: https://www.sunhillo.com/product/sureline/ vulncheck.com: https://www.vulncheck.com/advisories/sunhillo-sureline-authentication-bypass-via-session-cookie

Credits

Bruno Alvarenga Rafael Salema Allan Victor Mateus Romão Ewerton Reis