Rv016 Multi Wan Vpn Router FirmwareOperating system · Cisco
CVE-2021-1329
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 RV016, RV042, RV042G, RV082, RV320, and RV325 Routers could allow an authenticated, remote attacker to execute arbitrary code or cause an affected device to restart unexpectedly. These 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.
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 (RV016, RV042, RV042G, RV082, RV320, RV325) allow authenticated administrators to send crafted HTTP requests that can execute arbitrary code with root privileges on the underlying Linux-based OS or cause the device to reload, resulting in denial of service.
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
Rv016 Multi Wan Vpn Router FirmwareOperating system
<= 4.2.3.14
Rv042 Dual Wan Vpn Router FirmwareOperating system
<= 4.2.3.14
Rv042g Dual Gigabit Wan Vpn Router FirmwareOperating system
<= 4.2.3.14
Rv082 Dual Wan Vpn Router FirmwareOperating system
<= 4.2.3.14
Rv320 Dual Gigabit Wan Vpn Router FirmwareOperating system
<= 1.5.1.11
Rv325 Dual Gigabit Wan Vpn Router FirmwareOperating system
<= 1.5.1.11CVSS 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 modelLocate the physical router or access its administration interface to confirm the model number (RV016, RV042, RV042G, RV082, RV320, or RV325)Affected if The router is any of these six models in the RV series
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Check the installed firmware versionLog into the web-based management interface and navigate to the status or system information page to view the firmware version. Alternatively, check the admin page or use the router's diagnostic tools to retrieve the firmware version string.Affected if The firmware version is 4.2.3.14 or lower for RV016/RV042/RV042G/RV082, or 1.5.1.11 or lower for RV320/RV325
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Confirm the web-based management interface is enabledAccess the router's administration panel and verify that the web-based management interface (HTTP or HTTPS) is turned on in the remote management or administration settings.Affected if The web management interface is enabled and accessible (this is the default configuration)
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Verify administrator access existsConfirm that at least one administrator account is configured and enabled for the router's web interface.Affected if An administrator account exists with access to the web management interface (this is required for the exploit to be triggered)
You are affected if your router is an RV016, RV042, RV042G, RV082, RV320, or RV325 model running firmware at or below the listed version thresholds and the web management interface with admin accounts is in use.
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 dataApply the Cisco firmware update for the affected router models. If no update is available, restrict web management interface access to trusted internal networks only and ensure administrator credentials are strong to reduce exploit likelihood.
Fix this in Rv016 Multi Wan Vpn Router Firmware
Scoped from the published advisory
- Consultation2.0 h
- Implementation1.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-1329 — 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-2021-1329 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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- Version or environment caveats, and links to real fixes
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