CVE-2024-26009 [High] | Authentication Bypass in Fortiswitchmanager

An authentication bypass using an alternate path or channel [CWE-288] vulnerability in Fortinet FortiOS 6.4.0 through 6.4.15, FortiOS 6.2.0 through 6.2.16, FortiOS 6.0 all versions, FortiPAM 1.2.0, FortiPAM 1.1.0 through 1.1.2, FortiPAM 1.0.0 through 1.0.3, FortiProxy 7.4.0 through 7.4.2, FortiProxy 7.2.0 through 7.2.8, FortiProxy 7.0.0 through 7.0.15, FortiSwitchManager 7.2.0 through 7.2.3, FortiSwitchManager 7.0.0 through 7.0.3 allows an unauthenticated attacker to seize control of a managed device via crafted FGFM requests, if the device is managed by a FortiManager, and if the attacker knows that FortiManager's serial number.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-03-18	0.16%	0.11%	-0.04%
2	2026-03-08	0.10%	0.16%	+0.06%
3	2026-01-08	—	0.10%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-03-18

0.16%

0.11%

-0.04%

2026-03-08

0.10%

0.16%

+0.06%

2026-01-08

—

0.10%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
8.1	3.1	HIGH	`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H` 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:H) Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work. 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:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	2.2	5.9	[email protected]
8.1	3.1	HIGH	`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H` 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:H) Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work. 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:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	2.2	5.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

8.1

3.1

HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H 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:H): Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
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:H): They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

2.2

5.9

[email protected]

8.1

3.1

HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H 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:H): Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
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:H): They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

2.2

5.9

[email protected]

Affected software / configurations for CVE-2024-26009

Vendor	Product	Version	Raw CPE
fortinet	fortiswitchmanager	>= 7.0.0, < 7.0.4	cpe:2.3:a:fortinet:fortiswitchmanager::::::::
fortinet	fortiswitchmanager	>= 7.2.0, < 7.2.4	cpe:2.3:a:fortinet:fortiswitchmanager::::::::
fortinet	fortiproxy	>= 7.0.0, < 7.0.16	cpe:2.3:a:fortinet:fortiproxy::::::::
fortinet	fortiproxy	>= 7.2.0, < 7.2.9	cpe:2.3:a:fortinet:fortiproxy::::::::
fortinet	fortiproxy	>= 7.4.0, < 7.4.3	cpe:2.3:a:fortinet:fortiproxy::::::::
fortinet	fortipam	>= 1.0.0, <= 1.2.0	cpe:2.3:o:fortinet:fortipam::::::::
fortinet	fortios	>= 6.0.0, < 6.2.17	cpe:2.3:o:fortinet:fortios::::::::
fortinet	fortios	>= 6.4.0, < 6.4.16	cpe:2.3:o:fortinet:fortios::::::::

References for CVE-2024-26009

URL	Tags
https://fortiguard.fortinet.com/psirt/FG-IR-24-042	Vendor Advisory

URL

CVE-2024-26009

Exploit prediction scoring system (EPSS) score for CVE-2024-26009

Common vulnerability scoring system (CVSS) metrics for CVE-2024-26009

Weakness enumeration for CVE-2024-26009

Affected software / configurations for CVE-2024-26009

References for CVE-2024-26009