CVE-2016-6601

Exp

Directory traversal vulnerability in the file download functionality in ZOHO WebNMS Framework 5.2 and 5.2 SP1 allows remote attackers to read arbitrary files via a .. (dot dot) in the fileName parameter to servlets/FetchFile.

Published: 2017-01-23 Last update: 2026-05-13 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2016-6601 is rated High Exploit Risk (80/100): CVSS High severity, with high exploitation likelihood (EPSS 92.78%, 100th percentile). 6 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2016-6601

EDB-ID Source Kind Published Link
40229 exploit_db edb 2016-08-10 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2016-6601

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-05-13 92.65% 92.78% +0.13%
2 2025-03-30 91.03% 92.65% +1.61%
3 2025-03-29 — 91.03% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2016-6601

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.0 HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2016-6601

Affected software / configurations for CVE-2016-6601

Vendor Product Version Raw CPE
zohocorp webnms_framework 5.2 cpe:2.3:a:zohocorp:webnms_framework:5.2:*:*:*:*:*:*:*
zohocorp webnms_framework 5.2 cpe:2.3:a:zohocorp:webnms_framework:5.2:sp1:*:*:*:*:*:*

References for CVE-2016-6601

URL Tags
http://packetstormsecurity.com/files/138244/WebNMS-Framework-5.2-SP1-Traversal-Weak-Obfuscation-User-Impersonation.html Exploit Third Party Advisory
http://seclists.org/fulldisclosure/2016/Aug/54 Exploit Mailing List
http://www.rapid7.com/db/modules/auxiliary/admin/http/webnms_cred_disclosure Third Party Advisory
http://www.rapid7.com/db/modules/auxiliary/admin/http/webnms_file_download Third Party Advisory
http://www.securityfocus.com/archive/1/539159/100/0/threaded
http://www.securityfocus.com/bid/92402 Third Party Advisory VDB Entry
https://blogs.securiteam.com/index.php/archives/2712 Exploit Technical Description Third Party Advisory
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 Exploit
https://www.exploit-db.com/exploits/40229/ Exploit Third Party Advisory
cvelogic Threat Intelligence