Historical catalog analysis: CISA added this entry on March 03, 2025. The entry reflects catalog information retrieved on August 31, 2026, not a snapshot archived on the inclusion date. Check current vendor guidance before acting.
What the vulnerability is
CVE-2023-20118 is a command injection vulnerability (CWE-77) located within the web-based management interface of Cisco Small Business RV Series Routers. The flaw allows an authenticated attacker with remote access to execute arbitrary commands, potentially resulting in root-level privileges and unauthorized data access.
Exposure and applicability
This vulnerability affects organizations utilizing Cisco Small Business RV Series Routers that have the web-based management interface enabled and accessible to authenticated users. Because this is a command injection flaw, the primary exposure path is through the administrative web console. The risk is highest for environments where administrative credentials may be compromised or shared among multiple users.
Remediation priorities
Based on the inclusion of this vulnerability in the CISA Known Exploited Vulnerabilities catalog, we analyze the following prioritization steps:
- Asset Identification: Immediately identify all deployed RV Series Routers within the infrastructure to determine the scope of exposure.
- Vendor Mitigation: Apply the specific mitigations provided by Cisco for these devices.
- Lifecycle Evaluation: For devices where mitigations are unavailable or cannot be applied, prioritize the discontinuation of the product and replacement with supported hardware.
- Access Restriction: Limit access to the web-based management interface to trusted internal networks only, reducing the remote attack surface while patching is underway.
How to validate remediation
Verification must go beyond a simple version check. To ensure exposure has been reduced, defenders should:
* Confirm Mitigation Application: Verify that vendor-specified updates or configuration changes have been successfully applied across all identified assets.
* Interface Audit: Validate that the web-based management interface is no longer accessible from unauthorized network segments.
* Privilege Review: Audit administrative accounts to ensure only necessary personnel have the authenticated access required to reach the vulnerable interface.
Limits and open questions
While the vulnerability allows for root-level access, it requires authentication; therefore, the actual risk depends on the strength of the organization’s credential management. It remains unknown whether this vulnerability has been utilized in ransomware campaigns. Furthermore, there is a residual risk that other undiscovered vulnerabilities exist within the same management interface, meaning that patching CVE-2023-20118 does not guarantee the overall security of the device.
Source and editorial note
CVE-2023-20118: Cisco Small Business RV Series Routers Command Injection Vulnerability · Source date: March 03, 2025 · Retrieved August 31, 2026.
Material facts are tied to the cited primary source. Recommendations are independent defensive analysis unless attributed to the source. Confirm consequential decisions against current authoritative guidance.
Archive date: March 06, 2025. The displayed post date is assigned three days after the source date to organize this retrospective archive; it does not mean this site published the analysis then. First published by this site: October 23, 2026 at 00:10 UTC.
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