What is the CVSS score of CVE-2025-57623?

CVE-2025-57623 has a CVSS 3.1 base score of 5.3 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L. EPSS exploitation probability: 0.4%.

Which versions of N600r Firmware are affected by CVE-2025-57623?

Organizations using TOTOLINK N600R firmware should be aware of moderate risk from CVE-2025-57623, a null pointer dereference vulnerability rated CVSS 5.3.

Is there a public PoC exploit available for CVE-2025-57623?

Yes, a public proof-of-concept exploit is available for CVE-2025-57623. Prioritise patching immediately. EPSS: 0.4%.

How to fix or mitigate CVE-2025-57623?

Within 30 days: Identify affected systems running TOTOLINK N600R firmware and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

N600r Firmware CVE-2025-57623

MEDIUM

NULL Pointer Dereference (CWE-476)

2025-09-25 cve@mitre.org

Denial Of Service Null Pointer Dereference N600r Firmware TOTOLINK

5.3

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

5.3 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:14 vuln.today

PoC Detected

Sep 29, 2025 - 13:07 vuln.today

Public exploit code

CVE Published

Sep 25, 2025 - 18:15 nvd

MEDIUM 5.3

DescriptionCVE.org

A NULL pointer dereference in TOTOLINK N600R firmware v4.3.0cu.7866_B2022506 allows attackers to cause a Denial of Service.

AnalysisAI

A NULL pointer dereference in TOTOLINK N600R firmware v4.3.0cu.7866_B2022506 allows attackers to cause a Denial of Service. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as NULL Pointer Dereference (CWE-476), which allows attackers to crash the application by dereferencing a null pointer. A NULL pointer dereference in TOTOLINK N600R firmware v4.3.0cu.7866_B2022506 allows attackers to cause a Denial of Service. Affected products include: Totolink N600R Firmware.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Check pointers before dereferencing. Use static analysis tools to detect null pointer paths.