Cyber Resilience

CVE-2024-27521

High

Published: 26 March 2024

Published
26 March 2024
Modified
08 April 2025
KEV Added
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Patch
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CVSS Score v3.1 8.0 CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0177 83.1th percentile
Risk Priority 17 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2024-27521 is a high-severity OS Command Injection (CWE-78) vulnerability in Totolink A3300R Firmware. Its CVSS base score is 8.0 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 16.9% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

TOTOLINK A3300R V17.0.0cu.557_B20221024 was discovered to contain an unauthenticated remote command execution (RCE) vulnerability via multiple parameters in the "setOpModeCfg" function. This security issue allows an attacker to take complete control of the device. In detail, exploitation allows unauthenticated, remote…

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attackers to execute arbitrary system commands with administrative privileges (i.e., as user "root").

CWE(s)
CWE-78

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

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 →
T1059.008 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 →
Why these techniques?

Unauthenticated RCE in the public-facing web interface (setOpModeCfg) enables exploitation of public-facing application (T1190) and arbitrary root command execution on the network device (T1059.008).

Affected Assets

totolink
a3300r firmware
17.0.0cu.557_b20221024

Mitigating Controls

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.

References