CVE-2024-26006 [High] | XSS in Fortios

An improper neutralization of input during web page Generation vulnerability [CWE-79] in FortiOS version 7.4.3 and below, version 7.2.7 and below, version 7.0.13 and below and FortiProxy version 7.4.3 and below, version 7.2.9 and below, version 7.0.16 and below web SSL VPN UI may allow a remote unauthenticated attacker to perform a Cross-Site Scripting attack via a malicious samba server.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-04-25	0.81%	0.42%	-0.40%
2	2026-04-24	0.55%	0.81%	+0.27%
3	2025-11-21	—	0.55%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-04-25

0.81%

0.42%

-0.40%

2026-04-24

0.55%

0.81%

+0.27%

2025-11-21

—

0.55%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
7.5	3.1	HIGH	`CVSS:3.1/AV:N/AC:H/PR:N/UI:R/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:R) A real person has to do something—click, install, enable—otherwise it doesn’t land. 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.	1.6	5.9	[email protected]
6.1	3.1	MEDIUM	`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/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:R) A real person has to do something—click, install, enable—otherwise it doesn’t land. Scope (S:C) Breaking this can reach past the original component and bite other resources—bigger blast radius. Confidentiality (C:L) Some sensitive info could get out, but not a total data dump. Integrity (I:L) Attackers could change some data, but it’s limited—not everything goes. Availability (A:N) Service keeps running; no real outage angle.	2.8	2.7	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

7.5

3.1

HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/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:R): A real person has to do something—click, install, enable—otherwise it doesn’t land.
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.

1.6

5.9

[email protected]

6.1

3.1

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/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:R): A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C): Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:L): Some sensitive info could get out, but not a total data dump.
Integrity (I:L): Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N): Service keeps running; no real outage angle.

2.8

2.7

[email protected]

Affected software / configurations for CVE-2024-26006

Vendor	Product	Version	Raw CPE
fortinet	fortios	>= 6.4.0, < 7.0.14	cpe:2.3:o:fortinet:fortios::::::::
fortinet	fortios	>= 7.2.0, < 7.2.8	cpe:2.3:o:fortinet:fortios::::::::
fortinet	fortios	>= 7.4.0, < 7.4.4	cpe:2.3:o:fortinet:fortios::::::::
fortinet	fortiproxy	>= 7.0.0, < 7.0.17	cpe:2.3:a:fortinet:fortiproxy::::::::
fortinet	fortiproxy	>= 7.2.0, < 7.2.10	cpe:2.3:a:fortinet:fortiproxy::::::::
fortinet	fortiproxy	>= 7.4.0, < 7.4.4	cpe:2.3:a:fortinet:fortiproxy::::::::

References for CVE-2024-26006

URL	Tags
https://fortiguard.fortinet.com/psirt/FG-IR-23-485	Vendor Advisory

URL

CVE-2024-26006

Exploit prediction scoring system (EPSS) score for CVE-2024-26006

Common vulnerability scoring system (CVSS) metrics for CVE-2024-26006

Weakness enumeration for CVE-2024-26006

Affected software / configurations for CVE-2024-26006

References for CVE-2024-26006