Redundancy Configuration ManagerApplication · Cisco
CVE-2022-20750
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 · uneditedA vulnerability in the checkpoint manager implementation of Cisco Redundancy Configuration Manager (RCM) for Cisco StarOS Software could allow an unauthenticated, remote attacker to cause the checkpoint manager process to restart upon receipt of malformed TCP data. This vulnerability is due to improper input validation of an ingress TCP packet. An attacker could exploit this vulnerability by sending crafted TCP data to the affected application. A successful exploit could allow the attacker to cause a denial of service (DoS) condition due to the checkpoint manager process restarting.
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 confidenceA vulnerability in Cisco RCM's checkpoint manager allows unauthenticated remote attackers to send malformed TCP packets that cause the checkpoint manager process to restart, resulting in denial of service. The root cause is improper input validation of ingress TCP packets.
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
Redundancy Configuration ManagerApplication
< 21.24.0CVSS 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
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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 if Cisco RCM is installedLocate Cisco Redundancy Configuration Manager software on the system or check for RCM-related processesAffected if Cisco RCM software is present on the system
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Determine the installed RCM versionRetrieve the version number of the Cisco RCM installation and compare it against the affected range (versions prior to 21.24.0)Affected if The installed version is below 21.24.0
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Confirm checkpoint manager is runningVerify the checkpoint manager process or service is active, since this is the vulnerable componentAffected if The checkpoint manager process is running
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Assess network exposure of management interfacesDetermine if RCM management interfaces are accessible to unauthenticated remote attackers via TCPAffected if RCM management interfaces are exposed to untrusted networks
The environment is affected if Cisco RCM version is below 21.24.0, the checkpoint manager component is active, and the management interface accepts TCP traffic from untrusted sources.
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 · scoped21.24.0
Apply the vendor patch when available; otherwise, restrict network access to the affected RCM management interfaces to limit exposure to unauthenticated TCP traffic.
21.24.0 or later
- Upgrade Cisco Redundancy Configuration Manager (RCM) for Cisco StarOS Software to version 21.24.0 or later
Generated from the published advisory — verify against the referenced sources before acting.
Fix this in Redundancy Configuration Manager
Scoped from the published advisory
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA3.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,888.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2022-20750 — 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-2022-20750 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
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