CVE-2021-1166 Explained : Impact and Mitigation

Multiple vulnerabilities in the web-based management interface of Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers could allow an authenticated, remote attacker to execute arbitrary code or cause a denial of service. This article delves into the impact, technical details, and mitigation steps related to CVE-2021-1166.

Understanding CVE-2021-1166

CVE-2021-1166 highlights security flaws in Cisco Small Business RV Series Router Firmware, potentially exploited by remote attackers to compromise device security.

What is CVE-2021-1166?

The vulnerabilities in Cisco Small Business RV series routers could enable attackers with valid credentials to execute arbitrary code or trigger a denial of service condition, impacting system integrity.

The Impact of CVE-2021-1166

The vulnerabilities can result in high confidentiality, integrity, and availability impacts, allowing attackers to gain control over the underlying operating system or disrupt services through unexpected restarts.

Technical Details of CVE-2021-1166

The technical aspects of CVE-2021-1166 shed light on the specific vulnerability descriptions, affected systems, and the mechanism of exploitation.

Vulnerability Description

Improper validation of user input within the web-based management interface allows attackers to send crafted HTTP requests, potentially leading to arbitrary code execution or device reloads.

Affected Systems and Versions

Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers are impacted by these vulnerabilities due to deficiencies in input validation mechanisms.

Exploitation Mechanism

Remote attackers with valid administration credentials can exploit the flaws by manipulating HTTP requests, gaining unauthorized access to system controls.

Mitigation and Prevention

Safeguarding against CVE-2021-1166 involves immediate actions and long-term security strategies to mitigate risks and protect network infrastructure.

Immediate Steps to Take

Network administrators should review access controls, monitor for suspicious activities, and restrict unauthorized access to mitigate potential exploitation until a patch is available.

Long-Term Security Practices

Implementing network segmentation, regular security assessments, and user privileges management can enhance overall security posture and reduce exposure to similar vulnerabilities.

Patching and Updates

While Cisco has yet to release software updates addressing CVE-2021-1166, organizations are advised to stay informed through security advisories and promptly apply patches to remediate the vulnerabilities.