CVE-2025-45835: wf2880 Null Dereference — Exploit

Description

A null pointer dereference vulnerability was discovered in Netis WF2880 v2.1.40207. The vulnerability exists in the FUN_004904c8 function of the cgitest.cgi file. Attackers can trigger this vulnerability by controlling the environment variable value CONTENT_LENGTH, causing the program to crash and potentially leading to a denial-of-service (DoS) attack.

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CVSS v3.1 Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-476 CWE-476

Affected Products

Vendor	Product	Versions
netis-systems	wf2880_firmware	All
netis-systems	wf2880	All

References

Exploits

https://github.com/Chinesexilinyu/Netis-WF2880-cgitest.cgi-Null-Pointer-Dereference-Vulnerability/tree/main/1 https://github.com/Chinesexilinyu/Netis-WF2880-cgitest.cgi-Null-Pointer-Dereference-Vulnerability/tree/main/1

Frequently Asked Questions

What is CVE-2025-45835? +

A null pointer dereference vulnerability was discovered in Netis WF2880 v2.1.40207. The vulnerability exists in the FUN_004904c8 function of the cgitest.cgi file. Attackers can trigger this vulnerability by controlling the environment variable value CONTENT_LENGTH, causing the program to crash and potentially leading to a denial-of-service (DoS) attack. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2025-45835? +

CVE-2025-45835 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-45835? +

CVE-2025-45835 affects products from netis-systems, specifically: wf2880, wf2880_firmware. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-45835? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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