CVE-2023-42771
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 · uneditedAuthentication bypass vulnerability in ACERA 1320 firmware ver.01.26 and earlier, and ACERA 1310 firmware ver.01.26 and earlier allows a network-adjacent unauthenticated attacker who can access the affected product to download configuration files and/or log files, and upload configuration files and/or firmware. They are affected when running in ST(Standalone) mode.
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 confidenceAuthentication bypass vulnerability in ACERA 1320 and ACERA 1310 firmware versions 01.26 and earlier allows a network-adjacent unauthenticated attacker to download and upload configuration files, log files, and firmware when the device runs in ST (Standalone) mode. The attacker gains unauthorized access without any credentials due to missing authentication checks in the file transfer functionality.
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<= 01.26<= 01.26CVSS 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
- Adjacent
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:A/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 checksWork through these to decide whether this CVE applies to you.
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Identify device model and firmware versionAccess the device web interface or administrative console and locate the system information or about page to confirm the device is a Furunosystems Acera 1310 or Acera 1320 and record the installed firmware version numberAffected if The device model is Acera 1310 or Acera 1320 AND the firmware version is 01.26 or earlier
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Verify device is running in ST modeCheck the device configuration or operating mode setting through the administrative interface to determine if the device is configured to run in ST (Standalone) modeAffected if The device is set to ST (Standalone) mode - this mode is required for the vulnerability to be exploitable
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Assess network accessibilityDetermine if the device management interface is accessible from network segments accessible to untrusted users or if it is reachable by network-adjacent attackersAffected if The device management interface is network-adjacent and reachable by unauthenticated attackers on the same network segment
The device is affected if it is a Furunosystems Acera 1310 or 1320 with firmware version 01.26 or earlier AND it is running in ST (Standalone) mode with network accessibility.
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 dataUpdate ACERA 1320 and ACERA 1310 firmware to a version beyond 01.26. As an interim measure, isolate affected devices on a restricted network segment to limit network-adjacent attack surface and avoid running devices in ST mode if alternative modes are available.
- Consultation4.0 h
- Implementation6.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-42771 — 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-2023-42771 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
- No spam, self-promotion, credentials, or personal data