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CVE-2016-4966

23
FAUCET Score

CVE-2016-4966 describes an authenticated arbitrary file download vulnerability in Fortinet FortiWan (formerly AscernLink) versions prior to 4.2.5, specifically within the diagnosis_control.php page. This medium-severity vulnerability (CVSS 6.5) allows remote authenticated attackers to download PCAP files by manipulating the UserName GET parameter, leading to a high impact on integrity (I:H) with low attack complexity. While there is no evidence of active exploitation, public exploit code, or KEV listing, the vulnerability has received limited community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.2.4CPE matchmatch criteria
cpe:2.3:a:fortinet:fortiwan:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.20%
Probability of exploitation in next 30 days
EPSS Percentile
80.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0220 is in the 92nd percentile among its peer group of 21,958 CVEs.

Social Chatter

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

Media Mentions

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

Remediation

Remediation records are not available for this CVE.

References

docs.fortinet.com / uploaded/files/3236/fortiwan-v4.2.5-release-notes.pdf
Release NotesThird Party Advisory
fortiguard.com / advisory/fortiwan-multiple-vulnerabilities
Third Party Advisory
kb.cert.org / vuls/id/724487
Third Party AdvisoryUS Government Resource
securityfocus.com / bid/92781
Third Party AdvisoryVDB Entry