dbcve.org
Ac18 FirmwareOperating system · Tenda

CVE-2022-44175

CRITICAL · 9.8 CVSS v3.1 Published 2022-11-21
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges 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
Tenda AC18 V15.03.05.19 is vulnerable to Buffer Overflow via function formSetMacFilterCfg.

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

A buffer overflow vulnerability exists in the formSetMacFilterCfg function of Tenda AC18 router firmware V15.03.05.19. This allows remote attackers to potentially execute arbitrary code via specially crafted input to the mac filter configuration function.

MitigationApply vendor firmware patch when available; until then, disable the mac filter feature if not needed, restrict administrative access to trusted IPs only, and place the device behind a hardened perimeter.

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
Ac18 FirmwareOperating system
Affected:= 15.03.05.19

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

CVSS:3.1/AV:N/AC:L/PR:N/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 the router model
    Access the router web admin interface (typically 192.168.0.1) and check the device info page, or physically inspect the device label for the model number
    Affected if Device is not a Tenda AC18 router - different models are not affected by this specific CVE
  2. Check the installed firmware version
    In the router web admin interface, navigate to System Settings > Firmware Upgrade or Administration > Router Status to view the firmware version
    Affected if Firmware version is exactly 15.03.05.19 - only this specific version is affected; other versions are not vulnerable to this CVE
  3. Verify if the mac filter web endpoint is accessible
    Attempt to access the mac filter configuration page in the web interface (typically under Access Control > MAC Filter or similar)
    Affected if The mac filter configuration interface is reachable without authentication or with compromised admin credentials - this is the attack vector for the buffer overflow

You are affected only if you have a Tenda AC18 router running exactly firmware version 15.03.05.19 with the mac filter web interface accessible to the attacker.

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 vendor firmware patch when available; until then, disable the mac filter feature if not needed, restrict administrative access to trusted IPs only, and place the device behind a hardened perimeter.

Fix this in Ac18 Firmware Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing4.0 h
  • Review / QA2.0 h
18.0 hours of engineering $3,200
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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-2022-44175 in production — separate from our analysis above.

No notes yet

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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
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