Cyber Resilience

CVE-2023-51123

RCE in Dlink Dir-815 Firmware 1.01ssb08.bin

Public PoCRCECommand Injection
Published
10 January 2024
Modified
20 June 2025
CVSS Score v3.1 9.8
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.24 98th percentile
Risk Priority 92 floored blend · peak EPSS

Summary

CVE-2023-51123 is a critical-severity OS Command Injection (CWE-78) vulnerability in Dlink Dir-815 Firmware. Its CVSS base score is 9.8 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Command and Scripting Interpreter (T1059); ranked in the top 2% 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 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-2023-51123 is a remote code execution vulnerability in the D-Link DIR-815 router firmware version 1.01SSb08.bin. The flaw resides in the soapcgi_main function of the cgibin binary component and stems from improper handling of the service parameter in incoming POST requests, enabling OS command injection as indicated by the associated CWE-78 classification.

Unauthenticated attackers with network access can exploit the issue by sending a crafted POST request, achieving arbitrary code execution with full impact on confidentiality, integrity, and availability. The vulnerability carries a CVSS 3.1 score of 9.8 reflecting its critical severity and lack of required privileges or user interaction.

Public references consist of a GitHub repository containing proof-of-concept material and a README describing the service-parameter injection vector. The EPSS score rose from lower values to a peak of 0.5358 before receding to the current 0.3533, indicating a period of increased exploitation interest after disclosure.

OWASP Top 10 for Web (2025)

A05:2025 Injection

EU & UK References

Vulnerability Data

An issue discovered in D-Link dir815 v.1.01SSb08.bin allows a remote attacker to execute arbitrary code via a crafted POST request to the service parameter in the soapcgi_main function of the cgibin binary component.

CWE(s)
NVD-CWE-noinfoCWE-78

Related Threats

MITRE ATT&CK Enterprise Techniques

T1059 Command and Scripting Interpreter Execution
Adversaries may abuse command and script interpreters to execute commands, scripts, or binaries.
attack.mitre.org →
T1059.003 Windows Command Shell Execution
Adversaries may abuse the Windows command shell for execution.
attack.mitre.org →
T1059.004 Unix Shell Execution
Adversaries may abuse Unix shell commands and scripts for execution.
attack.mitre.org →
T1059.001 PowerShell Execution
Adversaries may abuse PowerShell commands and scripts for execution.
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 →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2024-22651Same product: Dlink Dir-815
CVE-2023-37758Same product: Dlink Dir-815
CVE-2023-51625Same vendor: Dlink
CVE-2023-34278Same vendor: Dlink
CVE-2023-32151Same vendor: Dlink
CVE-2019-17621Same vendor: Dlink
CVE-2023-50200Same vendor: Dlink
CVE-2024-4965Same vendor: Dlink
CVE-2023-24762Same vendor: Dlink
CVE-2024-5295Same vendor: Dlink

Affected Assets

dlink
dir-815 firmware
1.01ssb08.bin

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)
  • V1.2.5
  • V1.2.8
  • V15.2.5

Mitigating Controls (NIST 800-53 r5) AI

SA-11 Developer Testing and Evaluation good match

Developer testing and evaluation can discover missing or incorrect command sanitization during development.

SI-10 Information Input Validation good match

Input validation directly neutralizes or rejects special characters that would otherwise alter OS command structure.

AC-6 Least Privilege partial match

Least privilege reduces the permissions available to any process that could be subverted by injected commands.

CM-7 Least Functionality partial match

Least functionality restricts available OS commands and interpreters, limiting the blast radius of injection.

SA-8 Security and Privacy Engineering Principles partial match

Secure engineering principles require proper neutralization of untrusted input before command construction.

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

PR.PS-06's SDLC practices directly require secure coding and input handling that blocks command-injection defects, yet the single broad outcome leaves many specific neutralization vectors and verification gaps unaddressed.

PR.PS-02 partial match
prevents

Routine patching/maintenance can remediate known command-injection CVEs in dependencies (partial forward) but does nothing to stop developers from introducing improper neutralization in custom code (none reverse).

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.8.29 Security testing in development and acceptance mostly match
finds

Security testing and code review target insecure use of operating-system command interfaces, catching command-injection flaws introduced during development.

References