#VU108775 Resource exhaustion in F5 Networks products - CVE-2025-36504

Vulnerability identifier: #VU108775

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2025-36504

CWE-ID: CWE-400

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
BIG-IP
Hardware solutions / Firmware
BIG-IP Next SPK
Operating systems & Components / Operating system
BIG-IP Next CNF
Operating systems & Components / Operating system

Vendor: F5 Networks

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to system does not properly control consumption of internal resources when BIG-IP HTTP/2 httprouter profile is configured on a virtual server. A remote attacker can send specially crafted HTTP2 requests to the system and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

BIG-IP: 20.2.0 - 20.2.1, 17.1.0 - 17.1.1.4, 16.1.0 - 16.1.4.3

BIG-IP Next SPK: 1.7.0 - 1.9.2

BIG-IP Next CNF: 1.1.0 - 1.4.1

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External links
https://my.f5.com/manage/s/article/K000140919

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.