Cyber Resilience

CVE-2026-2182

RCE in Utt 521G Firmware 3.1.1-190816

Public PoCRCECommand Injection
Published
08 February 2026
Modified
10 February 2026
CVSS Score v4 7.3
Click a component to see what it means
Raw vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS Score 0.084 94th percentile
Risk Priority 36 floored blend · peak EPSS

Summary

CVE-2026-2182 is a high-severity Injection (CWE-74) vulnerability in Utt 521G Firmware. Its CVSS base score is 7.3 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Command and Scripting Interpreter (T1059); ranked in the top 6% 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-2026-2182 is a command injection vulnerability affecting the UTT 进取 521G router running firmware version 3.1.1-190816. The flaw exists in the doSystem function of the /goform/setSysAdm component, where the passwd1 argument can be manipulated to inject and execute arbitrary commands. Published on 2026-02-08, it is classified under CWE-74 (Improper Neutralization of Special Elements) and CWE-77 (Command Injection), with a CVSS v3.1 base score of 7.2 (AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H).

The vulnerability enables remote exploitation over the network by authenticated users possessing high privileges. Attackers require administrative access but face low complexity and no need for user interaction. Successful exploitation allows arbitrary command execution, resulting in high impacts to confidentiality, integrity, and availability, potentially leading to full remote code execution (RCE) on the device.

Advisories and references, including VulDB entries (ctiid.344885, id.344885) and GitHub repositories from cha0yang1/UTT521G, document the issue but do not specify patches or vendor-provided mitigations. The references include a detailed proof-of-concept (POC) for RCE, confirming public exploit availability.

Exploitation is feasible in real-world scenarios due to the disclosed POC, heightening risks for exposed UTT 进取 521G devices until firmware updates are applied.

OWASP Top 10 for Web (2025)

A05:2025 Injection

EU & UK References

Vulnerability Data

A weakness has been identified in UTT 进取 521G 3.1.1-190816. Affected by this issue is the function doSystem of the file /goform/setSysAdm. Executing a manipulation of the argument passwd1 can lead to command injection. The attack may be launched remotely.…

more

The exploit has been made available to the public and could be used for attacks.

CWE(s)
CWE-74CWE-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 →
T1221 Template Injection Stealth
Adversaries may create or modify references in user document templates to conceal malicious code or force authentication attempts.
attack.mitre.org →
T1659 Content Injection Initial Access
Adversaries may gain access and continuously communicate with victims by injecting malicious content into systems through online network traffic.
attack.mitre.org →
T1674 Input Injection Execution
Adversaries may simulate keystrokes on a victim’s computer by various means to perform any type of action on behalf of the user, such as launching the command interpreter using keyboard shortcuts, typing an inline script to be executed,…
attack.mitre.org →
T1059.001 PowerShell Execution
Adversaries may abuse PowerShell commands and scripts for execution.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2026-2188Same product: Utt 521G
CVE-2026-2135Same vendor: Utt
CVE-2026-2118Same vendor: Utt
CVE-2025-13442Same vendor: Utt
CVE-2026-2080Same vendor: Utt
CVE-2026-31059Same vendor: Utt
CVE-2026-2846Same vendor: Utt
CVE-2026-2847Same vendor: Utt
CVE-2026-1548Shared CWE-74, CWE-77
CVE-2026-8753Shared CWE-74, CWE-77

Affected Assets

utt
521g firmware
3.1.1-190816

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)
  • V1.2.1
  • V1.2.3
  • V1.2.5
  • V1.2.8

Mitigating Controls (NIST 800-53 r5) AI

SA-11 Developer Testing and Evaluation good match

Developer testing and evaluation can discover command-construction flaws before deployment.

SI-10 Information Input Validation good match

SI-10 directly requires validation of information inputs to reject malformed or special-element content before it reaches downstream parsers.

SA-8 Security and Privacy Engineering Principles partial match

Secure engineering principles include proper neutralization and safe command construction practices.

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 output encoding that prevent injection flaws.

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 injection vulnerabilities before release.

A.8.15 Logging partial match
finds

Logging supports detection of injection attempts but does not prevent the weakness.

A.8.16 Monitoring activities partial match
finds

Monitoring activities can identify active injection attacks after they occur.

A.8.25 Secure development life cycle partial match
prevents

Secure development life cycle mandates input validation and output encoding that directly prevent injection flaws.

A.8.26 Application security requirements partial match
prevents

Application security requirements explicitly call for controls against injection attacks in software design.

References