🛡️ CVE-2026-30897 — fortiweb

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is high, an attacker needs administrative privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

• Attack vector: Network — reachable from anywhere that can route to the service.
• Attack complexity: High — the attacker first has to win a race, learn a secret or otherwise prepare the target.
• Privileges required: High — administrative rights are needed first.
• User interaction: None — nobody has to be tricked into anything.
• Scope: Unchanged — the damage stays inside the vulnerable component.
• Confidentiality impact: High — total loss, or loss the attacker controls.
• Integrity impact: High — total loss, or loss the attacker controls.
• Availability impact: High — total loss, or loss the attacker controls.

Weakness class

CVE-2026-30897 is classified as CWE-121: Stack-based Buffer Overflow. An oversized write to a stack buffer overwrites saved state such as return addresses, which can redirect execution.

Affected software

CVE-2026-30897 is recorded against 1 package.

• fortiweb (from 8.0.0 up to 8.0.4)

Timeline and source

Published on 10 March 2026 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

fortiguard.fortinet.com

Other advisories for this package

fortiweb has other advisories on record. If you are patching this one, these are worth checking on the same host:

• CVE-2026-40688 (7.2 High, published 14 Apr 2026)
• CVE-2026-39814 (6.7 Medium, published 14 Apr 2026)
• CVE-2026-39811 (4.9 Medium, published 14 Apr 2026)
• CVE-2026-24641 (2.7 Low, published 10 Mar 2026)
• CVE-2026-24640 (6.6 Medium, published 10 Mar 2026)
• CVE-2026-24017 (8.1 High, published 10 Mar 2026)
• CVE-2025-66178 (7.2 High, published 10 Mar 2026)
• CVE-2025-48840 (5.3 Medium, published 10 Mar 2026)

Same weakness in other software

These advisories are the same class of weakness (CWE-121: Stack-based Buffer Overflow) in other software:

• CVE-2023-28760 (7.5 High, published 2 Oct 2025)
• CVE-2022-32502 (6.3 Medium, published 14 May 2024)
• CVE-2023-27332 (8.8 High, published 3 May 2024)
• CVE-2023-32144 (8.8 High, published 3 May 2024)
• CVE-2023-27369 (8.8 High, published 3 May 2024)
• CVE-2023-32142 (8.8 High, published 3 May 2024)
• CVE-2023-27368 (8.8 High, published 3 May 2024)
• CVE-2023-32141 (8.8 High, published 3 May 2024)

Details

Affected Packages

References