CVE-2015-8262
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 · uneditedBuffalo WZR-600DHP2 devices with firmware 2.09, 2.13, and 2.16 use an improper algorithm for selecting the ID value in the header of a DNS query, which makes it easier for remote attackers to spoof responses by predicting this value.
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 confidenceThe Buffalo WZR-600DHP2 router firmware versions 2.09, 2.13, and 2.16 uses a weak, predictable algorithm for generating DNS transaction IDs. Attackers can exploit this to perform DNS cache poisoning, redirecting users to malicious sites by spoofing DNS responses before the legitimate response arrives.
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= 2.09= 2.13= 2.16all versionsCVSS 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
- Changed
- Confidentiality
- None
- Integrity
- High
- Availability
- None
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/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 router modelLog into the router admin interface (typically 192.168.1.1) or check the device label. Look for Buffalo WZR-600DHP2 or Buffalotech Airstation Extreme N600.Affected if The device is either a Buffalo WZR-600DHP2 or Airstation Extreme N600.
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Check the firmware versionIn the router admin interface, navigate to the Administration or System section and locate the firmware version display. Compare it against the affected versions: 2.09, 2.13, or 2.16 for the WZR-600DHP2. For Airstation Extreme N600, all versions are affected.Affected if Firmware version is 2.09, 2.13, or 2.16 on WZR-600DHP2, or any version on Airstation Extreme N600.
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Verify DNS service is in useConfirm the router is handling DNS queries for clients. Check the router's DNS settings (usually under DHCP or Internet settings) to verify it is providing DNS resolution to connected devices.Affected if The router is serving as the primary DNS resolver for the network (default configuration for most home networks).
If the device is a Buffalo WZR-600DHP2 running firmware 2.09/2.13/2.16 or an Airstation Extreme N600 on any firmware version, and the router handles DNS queries, the environment is vulnerable to DNS cache poisoning via weak transaction ID generation.
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 dataUpgrade the router firmware to a patched version. If no update is available, consider replacing the device or implementing network-level protections such as DNSSEC validation or DNS over HTTPS/TLS proxies.
- Consultation2.0 h
- Implementation3.0 h
- Testing2.0 h
- Review / QA1.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2015-8262 — 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-2015-8262 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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