Cyber Resilience

CVE-2023-33782

RCE in Dlink Dir-842V2 Firmware 1.0.3

Public PoCRCECommand Injection
Published
07 June 2023
Modified
09 July 2026
Patch / advisory
View advisory
CVSS Score v3.1 8.8
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.37 98th percentile
Risk Priority 85 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2023-33782 is a high-severity Command Injection (CWE-77) vulnerability in Dlink Dir-842V2 Firmware. Its CVSS base score is 8.8 (High).

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.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

D-Link DIR-842V2 firmware version 1.0.3 contains a command injection vulnerability in its iperf3 diagnostics function. The flaw is tracked as CVE-2023-33782, carries a CVSS 3.1 score of 8.8, and is categorized under CWE-77. It allows an attacker to supply crafted input that is executed directly by the underlying operating system.

An authenticated user with network access can trigger the flaw without user interaction, resulting in arbitrary command execution on the device. Successful exploitation grants the attacker the ability to read, modify, or delete data and to disrupt device operation, consistent with the high impact ratings across confidentiality, integrity, and availability.

Public references point to a D-Link security bulletin page and a proof-of-concept repository that demonstrates the issue. No specific patch version or mitigation steps are detailed in the supplied references. The associated EPSS score currently stands at 0.5194 with a recorded peak of 0.5221, indicating sustained exploitation interest since disclosure.

OWASP Top 10 for Web (2025)

A05:2025 Injection

EU & UK References

Vulnerability Data

D-Link DIR-842V2 v1.0.3 was discovered to contain a command injection vulnerability via the iperf3 diagnostics function.

CWE(s)
CWE-77

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 →
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 →
T1059.001 PowerShell Execution
Adversaries may abuse PowerShell commands and scripts for execution.
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 →
T1059.008 Network Device CLI Execution
Adversaries may abuse scripting or built-in command line interpreters (CLI) on network devices to execute malicious command and payloads.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2024-44400Same vendor: Dlink
CVE-2025-60698Same vendor: Dlink
CVE-2025-29635Same vendor: Dlink
CVE-2025-29517Same vendor: Dlink
CVE-2024-29385Same vendor: Dlink
CVE-2023-44959Same vendor: Dlink
CVE-2023-43204Same vendor: Dlink
CVE-2024-51186Same vendor: Dlink
CVE-2023-43202Same vendor: Dlink
CVE-2023-0127Same vendor: Dlink

Affected Assets

dlink
dir-842v2 firmware
1.0.3

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)
  • V1.2.3
  • V1.2.5
  • V1.2.8
  • V1.2.9

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 SDLC practices directly require input validation and neutralization that prevent command injection.

DE.CM-09 partial match
prevents

Runtime monitoring of software and data can detect anomalous command execution resulting from injection.

ID.RA-01 partial match
prevents

Identifying recorded vulnerabilities enables remediation of command-injection flaws before exploitation.

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 standards require proper escaping and parameterization of commands, directly eliminating CWE-77.

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

Security testing in development catches command-injection vulnerabilities before release.

A.8.25 Secure development life cycle partial match
prevents

Secure development life cycle mandates input validation and command construction practices that directly prevent command injection.

A.8.26 Application security requirements partial match
prevents

Application security requirements explicitly call for controls against injection flaws including command injection.

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

Secure architecture principles reduce the attack surface but do not prescribe the specific neutralization techniques needed.

References