VulnerabilityPublished 10 Mar 2026Updated 12 Mar 2026

CVE-2026-24641: Fortinet FortiWeb · Denial of Service

Affects Fortinet FortiWebSource CVE Database V5

Compare

Public exploit available · CVSS 2.5 Low.

Data as of 30 Oct 2026, 06:59 UTC

CVSS 3.1 base score

2.5Low

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.4% chance of exploitation in 30 days – higher than 35% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C

Base metrics

Attack Vector: Network
Attack Complexity: Low
Privileges Required: High
User Interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: None
Availability: Low

Temporal metrics

Exploit Code Maturity: Proof-of-Concept
Remediation Level: Official Fix
Report Confidence: Confirmed

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: High: The attacker is authorized with (i.e., requires) privileges that provide significant (e.g., administrative) control over the vulnerable component that could affect component-wide settings and files.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: None: There is no loss of confidentiality within the impacted component.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: Low: Performance is reduced or there are interruptions in resource availability. Even if repeated exploitation of the vulnerability is possible, the attacker does not have the ability to completely deny service to legitimate users. The resources in the impacted component are either partially available all of the time, or fully available only some of the time, but overall there is no direct, serious consequence to the impacted component.
Exploit Code Maturity: Proof-of-Concept: Proof-of-concept exploit code is available, or an attack demonstration is not practical for most systems. The code or technique is not functional in all situations and may require substantial modification by a skilled attacker.
Remediation Level: Official Fix: A complete vendor solution is available. Either the vendor has issued an official patch, or an upgrade is available.
Report Confidence: Confirmed: Detailed reports exist, or functional reproduction is possible (functional exploits may provide this). Source code is available to independently verify the assertions of the research, or the author or vendor of the affected code has confirmed the presence of the vulnerability.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 10 Mar 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: evidence found.
CVSS exploit maturity: proof of concept public
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CVSS vector, the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
FortinetFortiWeb	Affected >=8.0.0 <=8.0.2 >=7.6.0 <=7.6.6 >=7.4.0 <=7.4.12 >=7.2.0 <=7.2.12 >=7.0.0 <=7.0.12	Fixed in–

CPE configurations (49)

cpe:2.3:a:fortinet:fortiweb:8.0.2:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiweb:8.0.1:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiweb:8.0.0:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiweb:7.6.6:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiweb:7.6.5:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiweb:7.6.4:*:*:*:*:*:*:*

AI-suggested

Apply official patches from Fortinet as soon as they are released to remediate the NULL Pointer Dereference vulnerability.
Restrict administrative and authenticated access to FortiWeb devices using strong authentication mechanisms such as multi-factor authentication and least privilege principles.
Monitor FortiWeb logs and system health to detect unusual HTTP daemon crashes or restarts that may indicate exploitation attempts.
Implement network segmentation to isolate FortiWeb management interfaces from general user networks, reducing exposure to unauthorized authenticated access.
Conduct regular audits of user accounts and permissions on FortiWeb to ensure only authorized personnel have high-level access.
Prepare incident response plans for potential denial of service scenarios affecting web application firewalls to minimize downtime.
Stay informed through Fortinet security advisories and vulnerability databases for updates or emerging exploit information.

Description

A NULL Pointer Dereference vulnerability [CWE-476] vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.2, 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 an authenticated attacker to crash the HTTP daemon via crafted HTTP requests.

Impact

The primary impact of CVE-2026-24641 is denial of service, which can interrupt the availability of FortiWeb's web application firewall services. This disruption can lead to unprotected web applications, exposing them to other attacks or causing downtime for critical web services. Although the vulnerability does not affect confidentiality or integrity, the loss of availability can impact business operations, especially for organizations relying heavily on FortiWeb for security enforcement and traffic management. The requirement for authenticated access limits the attack surface to insiders or attackers who have already compromised credentials, reducing the likelihood of widespread exploitation. However, in environments with multiple administrators or weak access controls, the risk increases. The absence of known exploits in the wild suggests limited immediate threat, but the vulnerability could be targeted in the future once details become widely known. Organizations with high availability requirements or regulatory obligations for uptime should prioritize remediation to avoid service interruptions.

References

fortiguard.fortinet.com/psirt/FG-IR-26-089 (opens in a new tab)

Community reviews

Loading reviews…