CVE-2020-23593
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 OPTILINK OP-XT71000N Hardware Version: V2.2, Firmware Version: OP_V3.3.1-191028 allows an unauthenticated, remote attacker to conduct a cross site request forgery (CSRF) attack to enable syslog mode through ' /mgm_log_cfg.asp.' The system starts to log events, 'Remote' mode or 'Both' mode on "Syslog -- Configuration page" logs events and sends to remote syslog server IP and Port.
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 confidenceThis is a Cross-Site Request Forgery (CSRF) vulnerability in the OPTILINK OP-XT71000N router firmware (V2.2/V3.3.1-191028). An unauthenticated remote attacker can trick an authenticated administrator into unknowingly submitting a request to /mgm_log_cfg.asp that enables remote syslog mode, causing the device to send log events to an attacker-specified syslog server IP and port.
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= 3.3.1-191028CVSS 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
- Required
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- High
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/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 device firmware versionAccess the router web interface or CLI and navigate to the system status or firmware information page. Look for a version field displaying either 'V2.2' or '3.3.1-191028'.Affected if The firmware version matches exactly '3.3.1-191028' (or V2.2 if that variant exists).
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Verify if remote syslog is currently enabledNavigate to the logging or syslog configuration page at /mgm_log_cfg.asp (or equivalent in the web UI). Check whether the remote syslog option is toggled on or enabled.Affected if Remote syslog is enabled and pointing to any syslog server IP address.
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Inspect the configured syslog destinationOn the same syslog configuration page, examine the syslog server IP and port fields. Note any IP address that is not an internal, trusted network address.Affected if The configured syslog server IP is external, unknown, or not under your administrative control.
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Assess management interface exposureDetermine if the router's web management interface (port 80/443) is accessible from untrusted networks or the public internet. Check firewall rules or ACLs governing access to the device.Affected if The management interface is reachable from untrusted networks, enabling potential CSRF attacks against authenticated administrators.
You are affected if the device runs firmware version 3.3.1-191028 (or V2.2), has remote syslog enabled, and the management interface is accessible to untrusted users who could trigger the CSRF attack.
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 patch if available; alternatively, restrict administrative access to the management interface to trusted networks only to reduce attack surface for CSRF exploitation.
- Consultation2.0 h
- Implementation4.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-23593 — 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-2020-23593 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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