ZOHO WebNMS Framework 5.2 and 5.2 SP1 allows remote attackers to bypass authentication…
Priority HIGH 84CWE-20Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA.
Summary
ZOHO WebNMS Framework 5.2 and 5.2 SP1 allows remote attackers to bypass authentication and impersonate arbitrary users via the UserName HTTP header.
Why it matters now
EPSS 0.86926 99th percentileScored 2026-11-07
Public exploit Yes 5 exploit referencesTagged by NVD and the CNA
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2016-6603
- 2026-10-03 Alias added: GHSA-2fmw-vp29-wcgf
References
Exploit 5
- 20160812 [CVE-2016-6600/1/2/3]: Multiple vulnerabilities (RCE, file download, etc) in WebNMS Framework 5.2 / 5.2 SP1
- 40229
- http://packetstormsecurity.com/files/138244/WebNMS-Framework-5.2-SP1-Traversal-Weak-Obfuscation-User-Impersonation.html
- https://blogs.securiteam.com/index.php/archives/2712
- https://github.com/pedrib/PoC/blob/master/advisories/webnms-5.2-sp1-pwn.txt
More Zohocorp Webnms Framework vulnerabilities
- TI-2016-05650 Directory traversal vulnerability in the file upload functionality in ZOHO WebNMS… CVSS 3.0CRITICAL 9.8
- TI-2016-05651 Directory traversal vulnerability in the file download functionality in ZOHO WebNMS… CVSS 3.0HIGH 7.5
- TI-2016-05652 ZOHO WebNMS Framework 5.2 and 5.2 SP1 use a weak obfuscation algorithm to store… CVSS 3.0CRITICAL 9.8
Sources
- CVE-2016-6603 · CVE Program
- CVE-2016-6603 · NVD
- FIRST EPSS
- GHSA-2fmw-vp29-wcgf · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences