CVE-2025-60336
Memory Safety in Totolink N600R Firmware 4.3.0cu.7866_b20220506
Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HSummary
CVE-2025-60336 is a high-severity NULL Pointer Dereference (CWE-476) vulnerability in Totolink N600R Firmware. Its CVSS base score is 7.5 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Endpoint Denial of Service (T1499); ranked in the top 26% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified map to SA-11 (Developer Testing and Evaluation) and SA-15 (Development Process, Standards, and Tools) — see the control section below for these in your framework.
Deeper analysis AI-assisted summary
Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.
CVE-2025-60336 is a NULL pointer dereference vulnerability, tracked under CWE-476, that resides in the sub_41773C function of the TOTOLINK N600R router running firmware version 4.3.0cu.7866_B20220506. The flaw can be triggered by a specially crafted HTTP request and produces a denial-of-service condition, reflected in its CVSS 3.1 base score of 7.5 with a network attack vector and high availability impact.
An unauthenticated remote attacker can send the malicious request directly to the device over the network, causing the affected function to dereference a NULL pointer and crash the service without any user interaction or credentials. Successful exploitation results only in loss of availability; no confidentiality or integrity impact is indicated.
The EPSS score for this CVE rose from a low baseline to a recorded peak of 0.0461, indicating that exploitation interest increased after public disclosure. A single public reference provides a proof-of-concept but contains no vendor advisory or patch information.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-35618
Vulnerability Data
A NULL pointer dereference in the sub_41773C function of TOTOLINK N600R v4.3.0cu.7866_B20220506 allows attackers to cause a Denial of Service (DoS) via a crafted HTTP request.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise Techniques
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Developer testing and evaluation (including static analysis) directly finds null-dereference bugs before deployment.
Documented development standards and tools can enforce null-safety rules and safe pointer usage.
Engineering principles can mandate defensive coding such as explicit null checks before dereference.
Mitigating Controls (NIST CSF 2.0) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.
Secure SDLC practices (static analysis, code review, safe coding standards) directly prevent NULL dereference bugs during development.
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.
Security testing can detect NULL dereference defects before release.
Secure SDLC mandates defensive coding practices that can prevent NULL dereferences.
Application security requirements can specify input validation and pointer-safety rules.
Secure architecture principles encourage defensive design that avoids unsafe pointer use.
Secure coding standards directly require NULL-pointer checks and safe dereference patterns.