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CVE-2016-6600

89
FAUCET Score

CVE-2016-6600 is a critical directory traversal vulnerability affecting ZOHO WebNMS Framework versions 5.2 and 5.2 SP1. This flaw allows unauthenticated remote attackers to upload and execute arbitrary JSP files by manipulating the fileName parameter in the FileUploadServlet. With a CVSS score of 9.8, this vulnerability is easily exploitable over the network with no user interaction, leading to complete compromise of confidentiality, integrity, and availability. While not listed in CISA KEV, exploit code is publicly available via Metasploit and ExploitDB, and it has a high EPSS score, indicating a significant likelihood of exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
5.2CPE matchmatch criteria
cpe:2.3:a:zohocorp:webnms_framework:5.2:*:*:*:*:*:*:*
5.2CPE matchmatch criteria
cpe:2.3:a:zohocorp:webnms_framework:5.2:sp1:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
90.55%
Probability of exploitation in next 30 days
EPSS Percentile
99.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
Metasploit: WebNMS Framework Server Arbitrary File Upload · Jul 4, 2016
ExploitDB: EDB-40229 · Aug 10, 2016
This CVE's current EPSS score of 0.9055 is in the 99th percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

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