Cyber Resilience

CVE-2025-50646

Memory Safety in Dlink Di-8003 Firmware 16.07.26a1

Memory Safety
Published
08 April 2026
Modified
25 July 2026
Patch / advisory
View advisory
CVSS Score v3.1 7.5
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score 0.0052 41th percentile
Risk Priority 58 floored blend · peak EPSS

Summary

CVE-2025-50646 is a high-severity Classic Buffer Overflow (CWE-120) vulnerability in Dlink Di-8003 Firmware. Its CVSS base score is 7.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked at the 41th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to SA-11 (Developer Testing and Evaluation) and SI-10 (Information Input Validation) — 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-2025-50646 is a buffer overflow vulnerability (CWE-120) affecting the D-Link DI-8003 device on firmware version 16.07.26A1. The flaw arises from insufficient input validation on the "name" parameter handled by the /qos_type_asp.asp endpoint, potentially allowing memory corruption when processing malformed requests.

The vulnerability has a CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H), indicating it is exploitable over the network with low attack complexity, no privileges or user interaction required, and unchanged impact scope. An unauthenticated remote attacker can send a specially crafted request to the vulnerable endpoint, triggering the buffer overflow and causing a denial-of-service condition through device crash or reboot, with high availability impact but no direct confidentiality or integrity effects.

D-Link has published mitigation guidance in security advisories, including SAP10505 at https://supportannouncement.us.dlink.com/security/publication.aspx?name=SAP10505 and the security bulletin page at https://www.dlink.com/en/security-bulletin/. Further details appear in the IoT vulnerability collection on GitHub at https://github.com/xiaotea/iot-vulnerability-collection/blob/main/README.md.

EU & UK References

Vulnerability Data

A buffer overflow vulnerability exists in D-Link DI-8003 16.07.26A1 due to insufficient input validation on the name parameter in the /qos_type_asp.asp endpoint.

CWE(s)
CWE-120

Related Threats

MITRE ATT&CK Enterprise Techniques

T1068 Exploitation for Privilege Escalation Privilege Escalation
Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.
attack.mitre.org →
T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1203 Exploitation for Client Execution Execution
Adversaries may exploit software vulnerabilities in client applications to execute code.
attack.mitre.org →
T1210 Exploitation of Remote Services Lateral Movement
Adversaries may exploit remote services to gain unauthorized access to internal systems once inside of a network.
attack.mitre.org →
T1212 Exploitation for Credential Access Credential Access
Adversaries may exploit software vulnerabilities in an attempt to collect credentials.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2025-50665Same product: Dlink Di-8003
CVE-2025-50668Same product: Dlink Di-8003
CVE-2024-52759Same product: Dlink Di-8003
CVE-2025-50652Same product: Dlink Di-8003
CVE-2025-50653Same product: Dlink Di-8003
CVE-2025-50654Same product: Dlink Di-8003
CVE-2025-50670Same product: Dlink Di-8003
CVE-2025-50667Same product: Dlink Di-8003
CVE-2025-50650Same product: Dlink Di-8003
CVE-2025-50672Same product: Dlink Di-8003

Affected Assets

dlink
di-8003 firmware
16.07.26a1

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V5.2.1

Mitigating Controls (NIST 800-53 r5) AI

SA-11 Developer Testing and Evaluation good match

Developer testing and analysis can find missing size checks before deployment.

SI-10 Information Input Validation good match

Input validation directly enforces size checks before buffer copies.

SA-8 Security and Privacy Engineering Principles partial match

Engineering principles require bounds checking and safe buffer handling in design.

SI-16 Memory Protection partial match

Memory protection limits the impact of an overflow once it occurs.

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.

PR.PS-06 mostly match
prevents

Secure development practices directly enforce bounds checking and input validation that prevent classic buffer overflows.

ID.RA-01 partial match
prevents

Vulnerability identification processes such as code review or scanning detect classic buffer overflows before exploitation.

PR.PS-02 partial match
prevents

Routine patching replaces vulnerable code containing unchecked buffer copies with corrected versions.

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.

A.8.28 Secure coding mostly match
prevents

Secure coding directly requires bounds-checked memory operations, addressing the root cause of CWE-120.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing in development and acceptance can detect buffer overflows through fuzzing and static analysis, though it does not prevent them at the source.

A.8.25 Secure development life cycle partial match
prevents

Secure development life cycle mandates processes that can include input validation and bounds checking to prevent buffer overflows.

A.8.26 Application security requirements partial match
prevents

Application security requirements can specify input-size validation and safe buffer handling to mitigate classic buffer overflows.

A.8.27 Secure system architecture and engineering principles partial match
prevents

Secure system architecture and engineering principles promote defensive coding patterns that reduce the likelihood of unchecked buffer copies.

References