Fortinet FortiOS up to 7.0.19/7.2.13/7.4.3 Redirect buffer overflow

Summaryinfo

A vulnerability labeled as problematic has been found in Fortinet FortiOS up to 7.0.19/7.2.13/7.4.3. This impacts an unknown function of the component Redirect. Such manipulation leads to buffer overflow. This vulnerability is uniquely identified as CVE-2025-43892. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability was found in Fortinet FortiOS up to 7.0.19/7.2.13/7.4.3. It has been rated as problematic. Affected by this issue is an unknown part of the component Redirect. The manipulation with an unknown input leads to a buffer overflow vulnerability. Using CWE to declare the problem leads to CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. Impacted is confidentiality. CVE summarizes:

A buffer over-read vulnerability in Fortinet FortiOS 7.6.0 through 7.6.2, FortiOS 7.4.0 through 7.4.8, FortiOS 7.2 all versions may allow an authenticated remote attacker to return a portion of device memory in the redirect response via submitting a specially crafted request.

The advisory is shared for download at fortiguard.fortinet.com. This vulnerability is handled as CVE-2025-43892 since 04/18/2025. The exploitation is known to be easy. The attack may be launched remotely. Additional levels of successful authentication are required for exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 07/14/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Firewall Software

Vendor

• Fortinet

Name

• FortiOS

Version

• 7.0.0
• 7.0.1
• 7.0.2
• 7.0.3
• 7.0.4
• 7.0.5
• 7.0.6
• 7.0.7
• 7.0.8
• 7.0.9
• 7.0.10
• 7.0.11
• 7.0.12
• 7.0.13
• 7.0.14
• 7.0.15
• 7.0.16
• 7.0.17
• 7.0.18
• 7.0.19
• 7.2.0
• 7.2.1
• 7.2.2
• 7.2.3
• 7.2.4
• 7.2.5
• 7.2.6
• 7.2.7
• 7.2.8
• 7.2.9
• 7.2.10
• 7.2.11
• 7.2.12
• 7.2.13
• 7.4.0
• 7.4.1
• 7.4.2
• 7.4.3

License

• commercial

Website

• Vendor: https://www.fortinet.com/

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CPE 2.2info

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Once again VulDB remains the best source for vulnerability data.

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