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Small Business Rv Series Router FirmwareOperating system · Cisco

CVE-2021-1610

HIGH · 8.8 CVSS v3.1 Published 2021-08-04
Fix available
A fix is available. Upgrade to 1.0.03.22 or later.
See remediation →
94/100
Remediation priority · Urgent
Remotely reachable Zero-click

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 · unedited
Multiple vulnerabilities in the web-based management interface of the Cisco Small Business RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers could allow an attacker to do the following: Execute arbitrary code Cause a denial of service (DoS) condition Execute arbitrary commands For more information about these vulnerabilities, see the Details section of this advisory.

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 · moderate confidence

Multiple vulnerabilities in the web-based management interface of Cisco Small Business RV340, RV340W, RV345, and RV345P routers allow unauthenticated or authenticated attackers to execute arbitrary code, cause denial of service, or execute arbitrary commands on the affected devices.

MitigationApply Cisco's available firmware updates for the RV series routers. If patches are unavailable, restrict web-based management interface access to trusted networks or disable it entirely until updates can be applied.

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
Small Business Rv Series Router FirmwareOperating system
Affected:< 1.0.03.22

CVSS 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
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:L/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 checks

Work through these to decide whether this CVE applies to you.

  1. Identify router model
    Locate the model number on the physical device label or check the web-based management interface dashboard for the exact model (RV340, RV340W, RV345, or RV345P)
    Affected if Router model is one of RV340, RV340W, RV345, or RV345P and firmware version is below 1.0.03.22
  2. Check firmware version
    Log into the web-based management interface, navigate to the Status or System Summary page, and locate the firmware version field. Alternatively, use the CLI command 'show version' and look for the firmware revision number.
    Affected if Firmware version is lower than 1.0.03.22 (for example, 1.0.03.20, 1.0.02.15, etc.)
  3. Verify web-based management is enabled
    In the web-based management interface, go to Firewall > Access Rules or Administration > Management Access, and check if HTTP or HTTPS management access is enabled on any WAN interface.
    Affected if Web-based management interface is enabled and accessible from WAN (or untrusted networks)
  4. Check management interface exposure
    From the router CLI or web interface, review the access rules or firewall settings to determine if the management interface (HTTP/HTTPS on ports 80/443) is exposed to the internet or untrusted networks.
    Affected if The management interface is reachable from external IP addresses or WAN-facing interfaces

You are affected if you own an RV340, RV340W, RV345, or RV345P router running firmware version earlier than 1.0.03.22 with web-based management enabled and exposed.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 · scoped
Upgrade available Upgrade to 1.0.03.22 or later
Fixed in 1.0.03.22
Interim mitigation

Apply Cisco's available firmware updates for the RV series routers. If patches are unavailable, restrict web-based management interface access to trusted networks or disable it entirely until updates can be applied.

Recommended fix High confidence

Firmware version 1.0.03.22 or later for RV340/RV340W/RV345/RV345P

  1. 1. Visit the Cisco Software Download page for Small Business RV340 Series routers at cisco.com
  2. 2. Locate the firmware download section for your specific model (RV340, RV340W, RV345, or RV345P)
  3. 3. Download firmware version 1.0.03.22 or later
  4. 4. Access the router's web-based management interface
  5. 5. Navigate to the Administration or System Management section
  6. 6. Select the firmware upgrade option
  7. 7. Upload the downloaded firmware file
  8. 8. Wait for the upgrade process to complete and the router to reboot

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Small Business Rv Series Router Firmware Scoped from the published advisory
  • Consultation2.0 h
  • Implementation2.0 h
  • Testing2.0 h
  • Review / QA1.0 h
7.0 hours of engineering $1,240
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,984.

Scan for this in your stack

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2021-1610 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • 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
  • No spam, self-promotion, credentials, or personal data