How severe is CVE-2016-4966?

CVE-2016-4966 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2016-4966 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-4966?

CVE-2016-4966 affects Fortinet Fortiwan. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2016-4966?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2016-4966 published?

CVE-2016-4966 was published on 2016-09-21 and last updated on 2026-06-17.

CVE-2016-4966

CVE-2016-4966 is a medium-severity vulnerability in Fortinet Fortiwan with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-287.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.0
EPSS exploit prediction: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Fortinet Fortiwan
Published: 2016-09-21
Last modified: 2026-06-17

Description

The diagnosis_control.php page in Fortinet FortiWan (formerly AscernLink) before 4.2.5 allows remote authenticated users to download PCAP files via vectors related to the UserName GET parameter.

Frequently asked questions

What is CVE-2016-4966?: The diagnosis_control.php page in Fortinet FortiWan (formerly AscernLink) before 4.2.5 allows remote authenticated users to download PCAP files via vectors related to the UserName GET parameter.
How severe is CVE-2016-4966?: CVE-2016-4966 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2016-4966 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-4966?: CVE-2016-4966 affects Fortinet Fortiwan. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2016-4966?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2016-4966 published?: CVE-2016-4966 was published on 2016-09-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:fortinet:fortiwan:*:*:*:*:*:*:*:*

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Other CWE-287 (Improper Authentication) vulnerabilities

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CVE-2026-42822 — Critical (CVSS 10.0): Improper authentication in Azure Local Disconnected Operations allows an unauthorized attacker to elevate privileges…
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