#VU108764 Input validation error in F5 Networks products - CVE-2025-36557

Vulnerability identifier: #VU108764

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-2025-36557

CWE-ID: CWE-20

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 insufficient validation of HTTP traffic in TMM module. A remote attacker can send specially crafted traffic to the device and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

BIG-IP: 16.1.0 - 16.1.4.3, 17.1.0 - 17.1.1.4

BIG-IP Next SPK: 1.7.0 - 1.9.2

BIG-IP Next CNF: 1.1.0 - 1.3.3

---

External links
https://my.f5.com/manage/s/article/K000139571

---

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.