What’s Vulnerable › Vulnerabilities

CVE-2016-6603

• Severity: critical (CVSS 9.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 86.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2017-01-23 · updated 2026-06-17
• Weakness: CWE-20

Description

ZOHO WebNMS Framework 5.2 and 5.2 SP1 allows remote attackers to bypass authentication and impersonate arbitrary users via the UserName HTTP header.

Affected products

• Zohocorp Webnms Framework: 5.2, 5.2-sp1

References

• http://packetstormsecurity.com/files/138244/WebNMS-Framework-5.2-SP1-Traversal-Weak-Obfuscation-User-Impersonation.html
• http://seclists.org/fulldisclosure/2016/Aug/54
• http://www.securityfocus.com/archive/1/539159/100/0/threaded
• http://www.securityfocus.com/bid/92402
• https://blogs.securiteam.com/index.php/archives/2712
• https://forums.webnms.com/topic/recent-vulnerabilities-in-webnms-and-how-to-protect-the-server-against-them
• https://github.com/pedrib/PoC/blob/master/advisories/webnms-5.2-sp1-pwn.txt
• https://www.exploit-db.com/exploits/40229/
• http://packetstormsecurity.com/files/138244/WebNMS-Framework-5.2-SP1-Traversal-Weak-Obfuscation-User-Impersonation.html
• http://seclists.org/fulldisclosure/2016/Aug/54
• http://www.securityfocus.com/archive/1/539159/100/0/threaded
• http://www.securityfocus.com/bid/92402

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