CVE-2024-33616
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 · uneditedAdmin authentication can be bypassed with some specific invalid credentials, which allows logging in with an administrative privilege. Sharp Corporation states the telnet feature is implemented on older models only, and is planning to provide the firmware update to remove the feature. As for the details of affected product names, model numbers, and versions, refer to the information provided by the respective vendors listed under [References].
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 confidenceSharp Corporation network devices (older models with telnet service) contain an authentication bypass vulnerability where specific invalid credentials can be used to gain administrative access. The telnet service implementation fails to properly validate authentication, allowing privilege escalation without legitimate credentials.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
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
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
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 Sharp device modelCheck the device inventory or use network discovery to determine the exact model number of the Sharp network device. Look for older models known to include telnet functionality.Affected if The device is an older Sharp network device model that includes telnet service capability.
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Verify telnet service is enabledAttempt to connect to the device on TCP port 23 (telnet) or check the device configuration for telnet service status.Affected if Telnet service is actively running or enabled on the device.
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Confirm telnet is network-accessibleScan the network for open port 23/telnet on the device IP address, or review firewall/network ACLs to determine if telnet is exposed to the network.Affected if Telnet port 23 is open and reachable from network segments other than trusted management networks.
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Check for telnet authentication enforcementReview device security configuration to confirm whether telnet access requires authentication, or observe telnet login prompts during connection attempts.Affected if Telnet authentication can be bypassed or is improperly validated, allowing access with invalid credentials.
A user is affected if they operate an older Sharp network device with telnet service enabled and exposed on the network, where the telnet authentication can be bypassed using specific invalid credentials to gain administrative access.
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.
From vendor dataApply the forthcoming firmware update to remove the telnet feature; until then, disable telnet access on affected devices via network segmentation or firewall rules to reduce attack surface.
- Consultation6.0 h
- Implementation12.0 h
- Testing6.0 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 $7,968.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2024-33616 — 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-2024-33616 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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