Cyber Resilience

CVE-2023-27076

RCE in Tenda G103 Firmware 1.0.0.5

Public PoCRCECommand Injection
Published
10 April 2023
Modified
05 May 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 0.23 98th percentile
Risk Priority 84 floored blend · peak EPSS

Summary

CVE-2023-27076 is a critical-severity OS Command Injection (CWE-78) vulnerability in Tenda G103 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.

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-2023-27076 is a command injection vulnerability, tracked under CWE-78, that affects the Tenda G103 router running firmware version 1.0.0.5. The flaw resides in the language parameter and permits unauthenticated remote attackers to inject and execute operating-system commands on the device.

An attacker with network access can supply a crafted language value to the affected endpoint, resulting in arbitrary code execution with full system privileges. The vulnerability carries a CVSS 3.1 base score of 9.8, reflecting its network-exploitable nature, lack of required authentication or user interaction, and complete impact on confidentiality, integrity, and availability.

Public references consist of technical write-ups hosted on GitHub that demonstrate the injection vector; no vendor advisory or firmware patch is referenced in the available sources.

EPSS for the CVE rose from a low baseline to a peak of 0.1403 in December 2025 before receding to the current value of 0.0293, indicating a period of increased exploitation interest after disclosure.

OWASP Top 10 for Web (2025)

A05:2025 Injection

EU & UK References

Vulnerability Data

Command injection vulnerability found in Tenda G103 v.1.0.0.5 allows attacker to execute arbitrary code via a the language parameter.

CWE(s)
CWE-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-2023-27079Same product: Tenda G103
CVE-2023-33530Same product: Tenda G103
CVE-2023-51100Same vendor: Tenda
CVE-2025-57639Same vendor: Tenda
CVE-2024-2851Same vendor: Tenda
CVE-2024-48825Same vendor: Tenda
CVE-2023-51099Same vendor: Tenda
CVE-2024-2854Same vendor: Tenda
CVE-2026-25857Same vendor: Tenda
CVE-2018-14558Same vendor: Tenda

Affected Assets

tenda
g103 firmware
1.0.0.5

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

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SC-27 Platform-independent Applications
addresses: CWE-78

Platform-independent apps typically execute inside a managed runtime or sandbox that restricts direct OS command execution, reducing the ability to exploit OS command injection.

SI-10 Information Input Validation
addresses: CWE-78

Validates inputs to block special elements that would alter OS command execution.

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