CVE-2023-49262
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 authentication mechanism can be bypassed by overflowing the value of the Cookie "authentication" field, provided there is an active user session.
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 the authentication cookie handling mechanism. By overflowing the value of the 'authentication' cookie field, an attacker can bypass the authentication mechanism, but only when an active user session already exists.
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< 2310271149CVSS 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
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/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 device firmware versionAccess the device admin interface or check system information to locate the firmware build number (typically found in System > Status, System > Firmware Upgrade, or via CLI command 'show version' if accessible)Affected if Firmware version is earlier than build 2310271149
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Verify cookie-based authentication is in useCheck the web management interface or API responses to confirm the 'authentication' cookie field is present in login and session responses. Inspect HTTP headers or cookies after authenticating to the deviceAffected if The authentication cookie mechanism is active and the device is network-accessible
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Confirm active session capabilityDetermine if user sessions can be established on the device - check for persistent login or session management features in the admin panel, or attempt to maintain a logged-in sessionAffected if Active user sessions can be created and maintained on the device
The device is affected if it runs Hongdian H8951 4g Esp Firmware earlier than build 2310271149, has the cookie-based authentication mechanism enabled, and supports active user 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.
dbcve · scoped2310271149
Implement strict input validation and bounds checking on the authentication cookie field to prevent overflow conditions; apply vendor patches as available; consider additional authentication layers as defense-in-depth.
H8951 4g Esp Firmware version 2310271149 or later
- Access the router/web interface administrative panel or use the vendor's firmware update mechanism
- Navigate to the firmware upgrade section (typically under Administration, System, or Maintenance settings
- Download firmware version 2310271149 or later from the vendor's official support website
- Upload the firmware file and allow the device to complete the upgrade process
- Verify the upgrade was successful by checking the firmware version in the device settings
- Ensure the 'authentication' cookie field is properly handled in post-upgrade testing
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation8.0 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-2023-49262 — 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-2023-49262 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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