Rv110w FirmwareOperating system · Cisco
CVE-2021-1165
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedMultiple 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 an affected device to restart unexpectedly. The vulnerabilities are due to improper validation of user-supplied input in the web-based management interface. An attacker could exploit these vulnerabilities by sending crafted HTTP requests to an affected device. A successful exploit could allow the attacker to execute arbitrary code as the root user on the underlying operating system or cause the device to reload, resulting in a denial of service (DoS) condition. To exploit these vulnerabilities, an attacker would need to have valid administrator credentials on the affected device. Cisco has not released software updates that address these vulnerabilities.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceMultiple input validation vulnerabilities in the web-based management interface of Cisco Small Business RV series routers (RV110W, RV130, RV130W, RV215W) allow authenticated remote attackers to inject arbitrary commands via crafted HTTP requests. Successful exploitation yields root-level code execution on the underlying Linux OS or causes device reload (DoS). The vulnerabilities stem from lack of proper sanitization of user-supplied parameters in HTTP requests to the management interface.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data
Rv110w FirmwareOperating system
= 1.2.2.8= 1.3.1.7
Rv130 Vpn Router FirmwareOperating system
= 1.2.2.8= 1.3.1.7
Rv130w FirmwareOperating system
= 1.2.2.8= 1.3.1.7
Rv215w Wireless N Vpn Router FirmwareOperating system
= 1.2.2.8= 1.3.1.7
Application Extension PlatformPlugin / extension
= 1.0.3.55CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- High
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify the router modelLog into the web management interface and locate the device information page, or check the physical device label for the model number (RV110W, RV130, RV130W, or RV215W)Affected if The device is any of these four models: RV110W, RV130, RV130W, or RV215W
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Check the firmware versionIn the web interface, navigate to Status > System Summary or similar, and note the firmware version displayedAffected if The firmware version is exactly 1.2.2.8 or 1.3.1.7
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Verify if web management interface is enabledIn the web interface, go to Administration > Management Interface or similar, and confirm the HTTP/HTTPS management access is enabledAffected if Web-based management is enabled and accessible
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Check network exposure of management interfaceReview firewall rules or ACLs to determine if the management interface is reachable from untrusted networks (WAN interface or non-VLANed networks)Affected if The management interface is accessible from untrusted/external networks without VPN or ACL restrictions
You are affected if you have a RV110W, RV130, RV130W, or RV215W router running firmware version 1.2.2.8 or 1.3.1.7 with the web management interface enabled and exposed to untrusted networks.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataSince Cisco has not released patches, implement network-based controls: restrict web management interface access to trusted IPs only, use VPN for administrative access, or replace with supported hardware. If the devices cannot be replaced, isolate them behind a firewall with strict ACLs limiting management access to authorized management stations.
Fix this in Rv110w Firmware
Scoped from the published advisory
- Consultation6.0 h
- Implementation12.0 h
- Testing8.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $8,448.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-1165 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2021-1165 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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