CVE-2025-31701
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. This can lead to service disruption (crashes) or potentially remote code execution, though ASLR protection on some devices may reduce RCE exploitability while DoS attacks remain viable.
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 Dahua product in your environmentLocate all Dahua devices on your network by reviewing device inventory, DHCP leases, or network scans. Check device model numbers and confirm they are Dahua brand products such as NVRs, DVRs, IP cameras, or video management servers.Affected if Any Dahua device is present in the environment
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Determine installed firmware versionAccess the device web interface, use the Dahua REST API (typically at /cgi-bin/configManager.cgi?action=getSystemInfo), or check through the device's local configuration menu. Note the exact firmware version string displayed.Affected if Firmware version cannot be determined or is earlier than the vendor patched version
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Check network exposure of device management interfacesReview firewall rules and network ACLs to determine if the device's HTTP/HTTPS management ports (typically 80/443) or RTSP port (554) are accessible from untrusted networks or the internet. Use nmap or network scanning to verify actual exposed services.Affected if Management or video streaming ports are exposed to untrusted networks or the internet
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Inspect device and system logs for crashes or anomaliesReview Dahua device logs through the web interface (System > Log) or export logs via API. Look for service restarts, process crashes, buffer overflow indicators, or authentication failures from unusual source IPs.Affected if Logs show unexplained service crashes, process restarts, or suspicious error messages related to packet processing
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Verify if remote management is enabledCheck device configuration for enabled remote management features including P2P cloud access, DDNS, or NAT traversal features that may expose the device externally.Affected if Remote management or cloud features are enabled and the device is network-accessible
Environment is affected if any Dahua device with an unpatched firmware version is present with network management interfaces exposed to untrusted networks, as the buffer overflow can be triggered by malicious packets.
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 patches when released; in the interim, implement network segmentation and firewall rules to restrict exposure to untrusted networks, and monitor for signs of exploitation attempts.
- Consultation6.0 h
- Implementation12.0 h
- Testing6.0 h
- Review / QA3.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-31701 — 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-2025-31701 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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