Rv215w FirmwareOperating system · Cisco
CVE-2022-20877
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 on an affected device or cause the device to restart unexpectedly, resulting in a denial of service (DoS) condition. These vulnerabilities are due to insufficient validation of user fields within incoming HTTP packets. An attacker could exploit these vulnerabilities by sending a crafted request to the web-based management interface. A successful exploit could allow the attacker to execute arbitrary commands on an affected device with root-level privileges or to cause the device to restart unexpectedly, resulting in a 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 command injection and DoS vulnerabilities exist in the web-based management interface of Cisco RV110W, RV130, RV130W, and RV215W routers. Insufficient validation of user-supplied fields in HTTP requests allows authenticated attackers with Administrator credentials to inject and execute arbitrary commands with root-level privileges or trigger device restarts. The vulnerabilities reside in the input handling routines of the web 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
Rv215w FirmwareOperating system
= 1.0.3.55
Rv130w FirmwareOperating system
= 1.0.3.55
Rv130 FirmwareOperating system
= 1.0.3.55
Rv110w FirmwareOperating system
= 1.0.3.55
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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Check installed firmware versionAccess the router web interface via browser, navigate to Status or System Summary page to view the firmware version, or log in via CLI/telnet and run 'show version' commandAffected if Firmware version is exactly 1.0.3.55
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Verify web-based management interface statusLog into the router web interface and navigate to Administration or Management settings to confirm if the HTTP/HTTPS management interface is enabledAffected if Web-based management interface is enabled and accessible
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Confirm remote management accessibilityCheck the management settings to determine if remote access via HTTP/HTTPS is permitted from external networks rather than only from the local LANAffected if Remote management via web interface is enabled and the device is reachable from untrusted networks
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Assess administrative account exposureReview the list of configured administrator accounts and verify whether default credentials are in use or if there are any unauthorized admin accounts presentAffected if Administrator credentials are compromised, weak, or accessible to untrusted users
The device is affected if the firmware version is exactly 1.0.3.55 and the web-based management interface is enabled and accessible to an attacker with administrator credentials.
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 · scopedSince Cisco has not released patches (EOL devices), mitigate by restricting access to the management interface via ACLs, disabling remote management, segmenting affected devices in a separate VLAN, or replacing the EOL routers with supported hardware.
- Restrict access to the web-based management interface by configuring ACLs on upstream network devices or firewalls to allow management access only from trusted IP addresses
- If remote management is not required, disable the web-based management interface access from the WAN/outside interface via the router's administration settings
- Enable VPN access for any legitimate remote administrators and route management traffic through the VPN tunnel
- If the Application Extension Platform is not in use, disable or remove it to reduce attack surface
- Monitor router logs for unusual or unexpected administrative actions
- Consider network segmentation to isolate the router from sensitive network segments
Generated from the published advisory — verify against the referenced sources before acting.
Fix this in Rv215w Firmware
Scoped from the published advisory
- Consultation8.0 h
- Implementation16.0 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 $10,240.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2022-20877 — 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-2022-20877 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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