CVE-2025-31700
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 has been found in Dahua products. Attackers could exploit a buffer overflow vulnerability by sending specially crafted malicious packets, potentially causing service disruption (e.g., crashes) or remote code execution (RCE). Some devices may have deployed protection mechanisms such as Address Space Layout Randomization (ASLR), which reduces the likelihood of successful RCE exploitation. However, denial-of-service (DoS) attacks remain a concern.
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 buffer overflow vulnerability exists in Dahua products that can be exploited by sending specially crafted malicious packets. Successful exploitation may cause service disruption (device crashes) or potentially allow remote code execution, though ASLR protection on some devices reduces the likelihood of successful RCE.
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
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:H/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 if the system is a Dahua productCheck the device model number, manufacturer label, or web interface for 'Dahua' branding. Many Dahua devices display the model on the login page or system info page.Affected if The device is a Dahua-branded product (NVR, DVR, IP camera, access control, or other Dahua hardware/software)
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Determine the firmware or software versionAccess the device web interface, SSH console, or check the device label. Look for a version number in the system settings, about page, or command output such as 'version' or 'show version'.Affected if The installed version falls within the affected range (compare your installed version to the affected ranges provided by Dahua security advisories)
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Identify the vulnerable network serviceDetermine which network services are enabled on the device. Common Dahua services include HTTP (port 80/443), ONVIF, RTSP, or proprietary Dahua protocols. Check the device network settings or running services.Affected if Network services that handle incoming packets are enabled and accessible (the buffer overflow is triggered by malicious packets to these services)
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Check network exposure of the deviceDetermine if the device is directly accessible from the internet or an untrusted network. Review firewall rules, port forwards, and VLAN configuration. Use external port scanning tools or review network topology.Affected if The device management interface or vulnerable services are exposed to untrusted networks (internet-facing or insufficiently segmented)
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Review device logs for crash or exploit indicatorsCheck system logs, security logs, or crash dump files for evidence of service restarts, buffer overflow errors, or suspicious network activity patterns. Access via web interface, FTP, or SSH.Affected if Logs show unexpected service crashes, error messages indicating memory corruption, or unusual inbound packet patterns
The environment is affected if it runs a Dahua product with a firmware version within the affected range and has network services handling packets enabled and accessible.
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-supplied patches for affected Dahua products when available. Where patching is not immediately possible, restrict network exposure of affected devices and implement monitoring for anomalous traffic patterns.
- Consultation6.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA3.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-31700 — 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-2025-31700 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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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.
- 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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