CVE-2026-15271
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 security vulnerability has been detected in TOTOLINK A3000RU, A3100R, A950RG, AC1200T10, CP450, CS185R_T10 and EX200 up to 20260906. Affected by this issue is some unknown functionality of the file /etc/boa/boa.conf of the component Web Interface. The manipulation leads to least privilege violation. The attack may be initiated remotely. The attack's complexity is rated as high. The exploitation is known to be difficult.
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 confidenceA privilege violation vulnerability exists in the TOTOLINK router web interface configuration file /etc/boa/boa.conf. The boa web server configuration contains a flaw that allows privilege escalation or improper privilege handling, potentially enabling authenticated attackers to gain elevated access beyond their intended permissions.
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
- High
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:H/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 checksWork through these to decide whether this CVE applies to you.
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Identify TOTOLINK router modelCheck router model via web interface login page, label on device, or command output like 'cat /proc/cpuinfo' if SSH is availableAffected if Device is not a TOTOLINK router - this CVE does not apply
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Verify boa web server is runningCheck for boa process: run 'ps | grep boa' or check if port 80/443 is listening via 'netstat -tulpn'Affected if Boa web server is not running - the vulnerability cannot be exploited
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Inspect boa.conf file for privilege settingsAccess /etc/boa/boa.conf via SSH/Telnet or filesystem check; look for directives like 'User', 'Group', or 'Require' settings that control privilege handlingAffected if boa.conf contains weak privilege directives or lacks proper user/group restrictions (compare configuration against vendor defaults)
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Check web interface authentication mechanismReview boa.conf for authentication settings; verify if the web login properly enforces privilege boundaries between user accountsAffected if Web authentication allows privilege escalation or does not properly isolate user privileges
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Verify admin access controlsIf SSH/Telnet available, check /etc/passwd and user group memberships; examine if multiple admin accounts exist with unclear privilege separationAffected if Multiple administrative accounts exist without proper privilege separation configured in boa.conf
A TOTOLINK router running the boa web server with the /etc/boa/boa.conf file containing improper privilege handling configuration is affected if the web interface is accessible to authenticated users.
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 vendor firmware updates when available; if unavailable, restrict administrative access to trusted networks and monitor for unauthorized administrative actions.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-15271 — 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-2026-15271 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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