CVE-2026-39811

🔶 medium

Summary

A integer overflow or wraparound vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.3, FortiWeb 7.6.0 through 7.6.6, FortiWeb 7.4 all versions, FortiWeb 7.2 all versions, FortiWeb 7.0 all versions may allow attacker to denial of service via <insert attack vector here>

CVSS Score

4.9

Medium

EPSS Score

0.1

Exploit Probability

Published Date

2026-04-14

First Seen: 2026-04-15

📊 Relative Risk Intelligence

This CVE is Lower Risk - more severe than 14.4% of all 365,890 vulnerabilities in our database.

#313,086

Below average severity

Severity Percentile

🎯 CISA SSVC Assessment Updated: Apr 14, 2026

🔍 Exploitation Status

None

No known exploits

⚙️ Automatable

Requires human interaction

💥 Technical Impact

Partial

Limited system impact

SSVC data provided by CISA

Last Modified 2026-04-21

Source NVD 🔗

CVSS Vector 3.1 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

CWE IDs (Weakness Types)

CWE-190

📦 Affected Products 5

Vendor	Product	Status	Affected Versions
fortinet	fortiweb	Affected	> 7.0.0 < 7.0.13
fortinet	fortiweb	Affected	> 7.2.0 < 7.2.13
fortinet	fortiweb	Affected	> 7.4.0 < 7.4.12
fortinet	fortiweb	Affected	> 7.6.0 < 7.6.7
fortinet	fortiweb	Affected	> 8.0.0 < 8.0.4

🔗 References 1

https://fortiguard.fortinet.com/psirt/FG-IR-26-108

Vendor Advisory

🔗 Related CVEs 6

CVE ID	Severity	CVSS	EPSS	Summary	Published
CVE-2026-26035	⛔ critical	9.8	0.7	An Improper Authentication vulnerability [CWE-287] vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.2, FortiWeb 7.6....	2026-08-12
CVE-2026-70466	🔶 medium	5.3	0.3	A incomplete list of disallowed inputs vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.2, FortiWeb 7.6.0 through 7....	2026-08-12
CVE-2026-39814	🔶 medium	6.7	0.0	A relative path traversal vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.2, FortiWeb 7.6.0 through 7.6.6, FortiWeb...	2026-04-14
CVE-2026-40688	⚠️ high	7.2	6.4	An out-of-bounds write vulnerability [CWE-787] vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.3, FortiWeb 7.6.0 th...	2026-04-14
CVE-2025-48840	🔶 medium	5.3	0.1	An authentication bypass by spoofing vulnerability in Fortinet FortiWeb 7.6.0 through 7.6.3, FortiWeb 7.4.0 through 7.4....	2026-03-10
CVE-2025-66178	⚠️ high	7.2	0.0	A improper neutralization of special elements used in an os command ('os command injection') vulnerability in Fortinet F...	2026-03-10

These CVEs affect the same products