How severe is CVE-2026-24017?

CVE-2026-24017 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-24017 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-24017?

CVE-2026-24017 affects Fortinet Fortiweb. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-24017?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-24017 have an EU (EUVD) identifier?

Yes. CVE-2026-24017 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-10520.

When was CVE-2026-24017 published?

CVE-2026-24017 was published on 2026-03-10 and last updated on 2026-06-17.

CVE-2026-24017

CVE-2026-24017 is a high-severity vulnerability in Fortinet Fortiweb with a CVSS 3.x base score of 8.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-799.

Key facts

Severity: High (CVSS 3.x base score 8.1)
EPSS exploit prediction: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-10520
Weakness: CWE-799
Affected product: Fortinet Fortiweb
Published: 2026-03-10
Last modified: 2026-06-17

Description

An Improper Control of Interaction Frequency vulnerability [CWE-799] vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.2, FortiWeb 7.6.0 through 7.6.5, FortiWeb 7.4.0 through 7.4.10, FortiWeb 7.2.0 through 7.2.11, FortiWeb 7.0.0 through 7.0.11 may allow a remote unauthenticated attacker to bypass the authentication rate-limit via crafted requests. The success of the attack depends on the attacker's resources and the password target complexity.

Frequently asked questions

What is CVE-2026-24017?: An Improper Control of Interaction Frequency vulnerability [CWE-799] vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.2, FortiWeb 7.6.0 through 7.6.5, FortiWeb 7.4.0 through 7.4.10, FortiWeb 7.2.0 through 7.2.11, FortiWeb 7.0.0 through 7.0.11 may allow a remote unauthenticated attacker to bypass the authentication rate-limit via crafted requests. The success of the attack depends on the attacker's resources and the password target complexity.
How severe is CVE-2026-24017?: CVE-2026-24017 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-24017 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-24017?: CVE-2026-24017 affects Fortinet Fortiweb. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-24017?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-24017 have an EU (EUVD) identifier?: Yes. CVE-2026-24017 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-10520.
When was CVE-2026-24017 published?: CVE-2026-24017 was published on 2026-03-10 and last updated on 2026-06-17.

References

https://fortiguard.fortinet.com/psirt/FG-IR-26-082

Affected products (1)

cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:*

More vulnerabilities in Fortinet Fortiweb

CVE-2026-24858 — Critical (CVSS 9.8): An Authentication Bypass Using an Alternate Path or Channel vulnerability [CWE-288] vulnerability in Fortinet…
CVE-2025-59719 — Critical (CVSS 9.8): An improper verification of cryptographic signature vulnerability in Fortinet FortiWeb 8.0.0, FortiWeb 7.6.0 through…
CVE-2025-64446 — Critical (CVSS 9.8): A relative path traversal vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.1, FortiWeb 7.6.0 through 7.6.4,…
CVE-2025-25257 — Critical (CVSS 9.8): An improper neutralization of special elements used in an SQL command ('SQL Injection') vulnerability [CWE-89]…
CVE-2023-25610 — Critical (CVSS 9.8): A buffer underwrite ('buffer underflow') vulnerability in the administrative interface of Fortinet FortiOS version…
CVE-2021-42756 — Critical (CVSS 9.8): Multiple stack-based buffer overflow vulnerabilities [CWE-121] in the proxy daemon of FortiWeb 5.x all versions,…

All CVEs affecting Fortinet Fortiweb →

Other CWE-799 vulnerabilities

CVE-2025-54321 — Critical (CVSS 9.8): In Ascertia SigningHub through 8.6.8, there is a lack of rate limiting on the reset password function, leading to an…
CVE-2025-29998 — High (CVSS 8.2): This vulnerability exists in the CAP back office application due to missing rate limiting on OTP requests in an API…
CVE-2026-7402 — High (CVSS 8.1): Improper Control of Interaction Frequency vulnerability in MeWare Software Development Inc. PDKS allows Flooding. This…
CVE-2021-41177 — High (CVSS 8.1): Nextcloud is an open-source, self-hosted productivity platform. Prior to versions 20.0.13, 21.0.5, and 22.2.0,…
CVE-2026-30972 — High (CVSS 7.5): Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior o…
CVE-2025-57816 — High (CVSS 7.5): Fides is an open-source privacy engineering platform. Prior to version 2.69.1, the Fides Webserver API's built-in…

Browse all CWE-799 vulnerabilities →