CVE-2016-4573 — Fortinet FortiSwitch FSW-108D-POE, FSW-124D, FSW-124D-POE, FSW-224D-POE, FSW-224D-FPOE, FSW-248D-POE, FSW-248D-FPOE, FSW-424D, FSW-424D-POE, FSW-424D-FPOE, FSW-448D, FSW-448D-POE, FSW-448D-FPOE, FSW-524D, FSW-524D-FPOE, FSW-548D, FSW-548D-FPOE, FSW-1024D, FSW-1048D, FSW-3032D, and FSW-R-112D-POE models, when in FortiLink managed mode and upgraded to 3.4.1, might allow remote attackers to bypass authentication and gain administrative access via an empty password for the rest_admin account

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CRITICAL

Fortinet FortiSwitch FSW-108D-POE, FSW-124D, FSW-124D-POE, FSW-224D-POE, FSW-224D-FPOE, FSW-248D-POE, FSW-248D-FPOE, FSW-424D, FSW-424D-POE, FSW-424D-FPOE, FSW-448D, FSW-448D-POE, FSW-448D-FPOE, FSW-524D, FSW-524D-FPOE, FSW-548D, FSW-548D-FPOE, FSW-1024D, FSW-1048D, FSW-3032D, and FSW-R-112D-POE models, when in FortiLink managed mode and upgraded to 3.4.1, might allow remote attackers to bypass authentication and gain administrative access via an empty password for the rest_admin account

Published Sep 9, 2016

9.8

CRITICAL

CVSS 3.0

EPSS 4.56%

Description

Fortinet FortiSwitch FSW-108D-POE, FSW-124D, FSW-124D-POE, FSW-224D-POE, FSW-224D-FPOE, FSW-248D-POE, FSW-248D-FPOE, FSW-424D, FSW-424D-POE, FSW-424D-FPOE, FSW-448D, FSW-448D-POE, FSW-448D-FPOE, FSW-524D, FSW-524D-FPOE, FSW-548D, FSW-548D-FPOE, FSW-1024D, FSW-1048D, FSW-3032D, and FSW-R-112D-POE models, when in FortiLink managed mode and upgraded to 3.4.1, might allow remote attackers to bypass authentication and gain administrative access via an empty password for the rest_admin account.

Affected products

Remediation

No remediation recorded yet.

Metrics

4.56% 0.04561

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.04561

Score over time

2022–2026

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Percentile over time

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Table of values (13 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	4.56% (0.04561)	91.31th	v5 (v2026.06.15)
Jun 15, 2026	4.56% (0.04561)	90.35th	v5 (v2026.06.15)
Mar 30, 2025	7.63% (0.07629)	91.05th	v4 (v2025.03.14)
Mar 29, 2025	10.73% (0.10730)	88.82th	v4 (v2025.03.14)
Mar 19, 2025	7.63% (0.07629)	90.79th	v4 (v2025.03.14)
Mar 17, 2025	6.00% (0.06004)	89.99th	v4 (v2025.03.14)
Dec 12, 2024	0.52% (0.00520)	77.59th	v3 (v2023.03.01)
Feb 8, 2024	0.52% (0.00520)	76.13th	v3 (v2023.03.01)
Mar 7, 2023	0.52% (0.00520)	73.22th	v3 (v2023.03.01)
Mar 6, 2023	1.14% (0.01136)	59.45th	v2 (v2022.01.01)
Oct 18, 2022	1.14% (0.01136)	58.28th	v2 (v2022.01.01)
Apr 1, 2022	1.14% (0.01136)	56.27th	v2 (v2022.01.01)
Feb 4, 2022	1.14% (0.01136)	34.23th	v2 (v2022.01.01)

Weaknesses (1)

CWE-264

References (3)

http://fortiguard.com/advisory/fortiswitch-rest-admin-account-exposed-under-specific-conditions
x_refsource_CONFIRMVendor Advisory
http://www.securityfocus.com/bid/92450
vdb-entryx_refsource_BID
https://www.themissinglink.com.au/security/advisories/cve-2016-4573
x_refsource_MISCThird Party Advisory

Link	Providers	Tags
http://fortiguard.com/advisory/fortiswitch-rest-admin-account-exposed-under-specific-conditions		x_refsource_CONFIRMVendor Advisory
http://www.securityfocus.com/bid/92450		vdb-entryx_refsource_BID
https://www.themissinglink.com.au/security/advisories/cve-2016-4573		x_refsource_MISCThird Party Advisory

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner mitre

Published Sep 9, 2016

Updated Aug 6, 2024

Reserved May 10, 2016

Link CVE-2016-4573

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 17, 2026

Link CVE-2016-4573

Red Hat

Severity n/a

Public date n/a

Links CVE-2016-4573