CVE-2021-1294
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 RV160, RV160W, RV260, RV260P, and RV260W VPN Routers could allow an unauthenticated, remote attacker to execute arbitrary code as the root user on an affected device. These vulnerabilities exist because HTTP requests are not properly validated. An attacker could exploit these vulnerabilities by sending a crafted HTTP request to the web-based management interface of an affected device. A successful exploit could allow the attacker to remotely execute arbitrary code on the 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 vulnerabilities in the web-based management interface of Cisco Small Business RV series routers (RV160, RV160W, RV260, RV260P, RV260W) allow unauthenticated remote attackers to execute arbitrary code as root due to improper HTTP request validation. Sending a crafted HTTP request to the web interface enables complete device compromise.
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< 1.0.01.02< 1.0.01.02< 1.0.01.02< 1.0.01.02< 1.0.01.02CVSS 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
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/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 device admin panel or check the physical device label to confirm the exact model number (RV160, RV160W, RV260, RV260P, or RV260W)Affected if The device is any of these five models and is not yet confirmed patched
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Check the installed firmware versionAccess the router web interface, navigate to the Administration or Status page, and locate the firmware version information. Alternatively, use the CLI command 'show version' to retrieve the firmware buildAffected if The firmware version is lower than 1.0.01.02 (for example, 1.0.00.XX or any build prior to 1.0.01.02)
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Confirm the web-based management interface is enabledIn the router web interface, go to Administration > Management > HTTP/HTTPS access and verify whether HTTP or HTTPS management is enabledAffected if HTTP or HTTPS web management access is currently enabled on the device
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Determine network exposure of the management interfaceCheck the router WAN/Internet-facing interface settings or external network access lists to see if the web management port (HTTP port 80 or HTTPS port 443) is accessible from outside the trusted local networkAffected if The web management interface is reachable from untrusted networks or the Internet
The device is affected if it is an RV160, RV160W, RV260, RV260P, or RV260W model running firmware below version 1.0.01.02, with the HTTP/HTTPS web management interface enabled and accessible from networks outside the trusted environment.
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.
dbcve · scoped1.0.01.02
Apply the vendor-supplied software/firmware update from Cisco to patched versions. If immediate patching is not feasible, restrict access to the web-based management interface to trusted networks only, or disable it if not required for operations.
Cisco Small Business RV series firmware 1.0.01.02 or later
- Obtain the fixed firmware version 1.0.01.02 or later from Cisco's official download portal (tools.cisco.com) for your specific router model (RV160, RV160W, RV260, RV260P, or RV260W)
- Access the web-based management interface of the affected Cisco Small Business RV series router
- Navigate to the Administration or System section of the web interface
- Locate the firmware upgrade or firmware update option
- Upload the downloaded fixed firmware file (version 1.0.01.02 or later)
- Allow the device to complete the firmware upload and automatic reboot process
- After the router restarts, verify the firmware version has been updated to 1.0.01.02 or later via the web interface or CLI
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation3.0 h
- Implementation3.0 h
- Testing3.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-1294 — 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-2021-1294 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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