PT-2025-39434 · Totolink · Totolink N600R

Z472421519 · Published 2025-09-25 · Updated 2025-09-25 · CVE-2025-57623

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions TOTOLINK N600R firmware version 4.3.0cu.7866 B2022506

Description A NULL pointer dereference exists in the TOTOLINK N600R firmware. This issue can be exploited by attackers to cause a Denial of Service. A NULL pointer dereference occurs when a program attempts to access a memory location that has a value of NULL, which can lead to crashes or unexpected behavior.

Recommendations Update to a newer version of the firmware that addresses this issue.

Exploit

Fix

DoS

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

BDU:2025-12686

CVE-2025-57623

Affected Products

Totolink N600R

References · 7

• 🔥 https://github.com/z472421519/BinaryAudit/blob/main/PoC/NPD/TOTOLink/CONTENT_LENGTH.md · Exploit
• 🔥 https://gist.github.com/z472421519/d17061ea79a72d39fe69c000fa1a6280 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2025-57623 · Security Note
• https://bdu.fstec.ru/vul/2025-12686 · Security Note
• https://osv.dev/vulnerability/CVE-2025-57623 · Vendor Advisory
• https://twitter.com/CVEnew/status/1971268996650393956 · Twitter Post
• https://t.me/CVEtracker/33358 · Telegram Post