CVE-2026-39811: Denial of service in Fortinet FortiWeb
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>
AI Analysis
Technical Summary
This vulnerability involves an integer overflow or wraparound in Fortinet FortiWeb versions 7.0.0 through 8.0.3. Exploitation can lead to denial of service, impacting availability. The CVSS vector indicates network attack vector, low attack complexity, high privileges required, no user interaction, unchanged scope, no confidentiality or integrity impact, but high impact on availability. Fortinet has released an official fix to remediate this vulnerability.
Potential Impact
Successful exploitation results in denial of service, disrupting the availability of FortiWeb devices. There is no impact on confidentiality or integrity. The attack requires high privileges, limiting the attack surface to authenticated users with elevated rights.
Mitigation Recommendations
An official fix is available from Fortinet to address this vulnerability. Users should apply the vendor-provided patches promptly to remediate the issue. Since this is not a cloud service, remediation depends on user action to update affected FortiWeb versions.
CVE-2026-39811: Denial of service in Fortinet FortiWeb
Description
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>
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an integer overflow or wraparound in Fortinet FortiWeb versions 7.0.0 through 8.0.3. Exploitation can lead to denial of service, impacting availability. The CVSS vector indicates network attack vector, low attack complexity, high privileges required, no user interaction, unchanged scope, no confidentiality or integrity impact, but high impact on availability. Fortinet has released an official fix to remediate this vulnerability.
Potential Impact
Successful exploitation results in denial of service, disrupting the availability of FortiWeb devices. There is no impact on confidentiality or integrity. The attack requires high privileges, limiting the attack surface to authenticated users with elevated rights.
Mitigation Recommendations
An official fix is available from Fortinet to address this vulnerability. Users should apply the vendor-provided patches promptly to remediate the issue. Since this is not a cloud service, remediation depends on user action to update affected FortiWeb versions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- fortinet
- Date Reserved
- 2026-04-07T15:24:09.991Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
Threat ID: 69de650a82d89c981fbf090a
Added to database: 4/14/2026, 4:02:18 PM
Last enriched: 4/14/2026, 4:17:20 PM
Last updated: 4/14/2026, 7:31:29 PM
Views: 6
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.