Medium severity · published Sep 25, 2025
CVE-2025-57623
A NULL pointer dereference in TOTOLINK N600R firmware v4.3.0cu.7866_B2022506 allows attackers to cause a Denial of Service
5.3
CVSS
0.4%
EPSS
No
On KEV
Description
A NULL pointer dereference in TOTOLINK N600R firmware v4.3.0cu.7866_B2022506 allows attackers to cause a Denial of Service.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 32% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NF
N600r Firmware · Totolink
4.3.0cu.7866_b2022506 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-57623
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-57623
Exploit
https://gist.github.com/z472421519/d17061ea79a72d39fe69c000fa1a6280
Exploit
https://github.com/z472421519/BinaryAudit/blob/main/PoC/NPD/TOTOLink/CONTENT_LENGTH.md
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