CVE-2008-1261
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 · uneditedThe Zyxel P-2602HW-D1A router with 3.40(AJZ.1) firmware provides different responses to admin page requests depending on whether a user is logged in, which allows remote attackers to obtain current login status by requesting an arbitrary admin URI.
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 Zyxel P-2602HW-D1A router with firmware 3.40(AJZ.1) returns different HTTP responses to admin page requests depending on whether a user is authenticated, allowing remote attackers to passively determine if an administrator is currently logged in by observing response differences.
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= 3.40\(ajz.1\)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
- Low
- Authentication
- None
- Confidentiality
- Partial
- Integrity
- None
- Availability
- None
AV:N/AC:L/Au:N/C:P/I:N/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 router modelCheck the device label or access the web interface and look for the model number in the admin console, typically at the top of the admin page or in the status/system information sectionAffected if Model is Zyxel P-2602HW-D1A
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Check firmware versionIn the router admin web interface, navigate to the status or system information page and look for the firmware version field. The version format appears as 3.40(AJZ.1)Affected if Firmware version equals exactly 3.40(AJZ.1)
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Determine admin interface network exposureCheck router configuration for remote management settings. Look for 'Remote Management', 'Web WAN Access', or similar options that enable HTTP/HTTPS admin access from the WAN/internet side. Use network scanning to confirm if TCP port 80 or 443 on the WAN IP responds to HTTP requestsAffected if Admin web interface is accessible from external/network locations (not restricted to LAN-only or localhost)
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Test HTTP response variationSend an HTTP GET request to common admin paths such as / or /index.html when no session is active, then compare response headers and body against expected authenticated responses. The vulnerability exists when responses differ between authenticated and unauthenticated states in a way that reveals session stateAffected if The router returns measurably different HTTP responses (status codes, headers, or body content) that correlate with administrator authentication status
You are affected if you have a Zyxel P-2602HW-D1A router running firmware version 3.40(AJZ.1) with the admin web interface exposed to network locations where an attacker could probe for active admin sessions.
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 any available firmware update from Zyxel; if no update exists, restrict administrative interface access via network segmentation, VPN, or firewall rules to minimize attack surface.
- Consultation2.0 h
- Implementation2.0 h
- Testing1.0 h
- Review / QA1.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2008-1261 — 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-2008-1261 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
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