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Rv340 Dual Wan Gigabit Vpn Router FirmwareOperating system · Cisco

CVE-2024-20393

HIGH · 8.8 CVSS v3.1 Published 2024-10-02
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
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
A vulnerability in the web-based management interface of Cisco Small Business RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers could allow an authenticated, remote attacker to elevate privileges on an affected device. This vulnerability exists because the web-based management interface discloses sensitive information. An attacker could exploit this vulnerability by sending crafted HTTP input to an affected device. A successful exploit could allow an attacker to elevate privileges from guest to admin.

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 confidence

This vulnerability in Cisco Small Business RV340/RV340W/RV345/RV345P routers allows an authenticated attacker with guest-level access to escalate to admin privileges. The web-based management interface improperly discloses sensitive information that can be harvested via crafted HTTP requests, enabling the privilege escalation.

MitigationApply the vendor-supplied firmware update for the affected RV series routers. If patches are unavailable, restrict web management interface access to trusted internal networks only and disable remote management where feasible.

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
Rv340 Dual Wan Gigabit Vpn Router FirmwareOperating system
Affected:= 1.0.00.29= 1.0.00.33= 1.0.01.16= 1.0.01.17= 1.0.01.18= 1.0.01.20= 1.0.02.16= 1.0.03.15= 1.0.03.16= 1.0.03.17= 1.0.03.18= 1.0.03.19
Rv340w Dual Wan Gigabit Wireless Ac Vpn Router FirmwareOperating system
Affected:= 1.0.00.29= 1.0.00.33= 1.0.01.16= 1.0.01.17= 1.0.01.18= 1.0.01.20= 1.0.02.16= 1.0.03.15= 1.0.03.16= 1.0.03.17= 1.0.03.18= 1.0.03.19
Rv345 Dual Wan Gigabit Vpn Router FirmwareOperating system
Affected:= 1.0.00.29= 1.0.00.33= 1.0.01.16= 1.0.01.17= 1.0.01.18= 1.0.01.20= 1.0.02.16= 1.0.03.15= 1.0.03.16= 1.0.03.17= 1.0.03.18= 1.0.03.19
Rv345p Dual Wan Gigabit Poe Vpn Router FirmwareOperating system
Affected:= 1.0.00.29= 1.0.00.33= 1.0.01.16= 1.0.01.17= 1.0.01.18= 1.0.01.20= 1.0.02.16= 1.0.03.15= 1.0.03.16= 1.0.03.17= 1.0.03.18= 1.0.03.19

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
    Check the physical device label or access the web management interface and look for the model number (RV340, RV340W, RV345, or RV345P) displayed on the status or system info page
    Affected if The model is one of RV340, RV340W, RV345, or RV345P
  2. Check firmware version
    Log into the web management interface and navigate to Status > System Summary or Administration > Firmware Upgrade to view the installed firmware version
    Affected if The firmware version matches one of these: 1.0.00.29, 1.0.00.33, 1.0.01.16, 1.0.01.17, 1.0.01.18, 1.0.01.20, 1.0.02.16, 1.0.03.15, 1.0.03.16, 1.0.03.17, 1.0.03.18, 1.0.03.19
  3. Verify web management is enabled
    Navigate to Administration > Management Interface or similar section in the web UI and check if HTTP/HTTPS management access is enabled
    Affected if Web-based management interface is accessible (enabled) on any interface (LAN or WAN)
  4. Check for guest user accounts
    Navigate to User Management or Accounts in the web interface and review whether guest-level user accounts exist with limited privileges
    Affected if Guest-level or limited-privilege user accounts are configured on the device

You are affected if you have a Cisco RV340/RV340W/RV345/RV345P router running one of the listed firmware versions with web management enabled and guest or low-privilege accounts present.

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.

From vendor data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Apply the vendor-supplied firmware update for the affected RV series routers. If patches are unavailable, restrict web management interface access to trusted internal networks only and disable remote management where feasible.

Fix this in Rv340 Dual Wan Gigabit Vpn Router Firmware Scoped from the published advisory
  • Consultation4.0 h
  • Implementation4.0 h
  • Testing4.0 h
  • Review / QA2.0 h
14.0 hours of engineering $2,480
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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-2024-20393 in production — separate from our analysis above.

No notes yet

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What this is

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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
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