CVE-2021-46279
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 · uneditedSession fixation and insufficient session expiration vulnerabilities allow an attacker to perfom session hijacking attacks against users. This issue affects: Lanner Inc IAC-AST2500A standard firmware version 1.10.0.
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 confidenceSession fixation and insufficient session expiration vulnerabilities in Lanner IAC-AST2500A firmware v1.10.0 allow attackers to hijack user sessions. Session fixation enables attackers to set or predict session IDs, while inadequate session expiration allows stolen or forged session tokens to remain valid indefinitely.
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= 1.10.0CVSS 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
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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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Confirm device model is Lanner IAC-AST2500AAccess the device management interface or use SNMP/CLI to query the hardware model identifierAffected if Device model is Lanner IAC-AST2500A
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Identify installed firmware versionCheck the firmware version through the web UI (typically in System > Firmware or About section), CLI command, or boot logAffected if Firmware version equals 1.10.0 exactly
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Inspect session ID generation behaviorExamine how session IDs are created and managed - check if session IDs are regenerated after authentication or if pre-authentication session IDs remain unchanged post-loginAffected if Session IDs are not regenerated upon authentication (session fixation vulnerability present)
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Review session expiration configurationCheck session timeout settings in the web interface (usually under Security or Session settings) and verify if sessions expire after inactivity or logoutAffected if Sessions do not expire or have no configured timeout (indefinite session validity)
Environment is affected if the device is a Lanner IAC-AST2500A running firmware version 1.10.0 and session ID regeneration is not performed post-login or sessions lack expiration controls.
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 dataImplement proper session ID regeneration upon authentication and enforce appropriate session timeout/ expiration mechanisms to invalidate idle or old sessions.
- Consultation4.0 h
- Implementation16.0 h
- Testing8.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $8,960.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-46279 — 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-2021-46279 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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