CVE-2026-7853
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 weakness has been identified in D-Link DI-8100 16.07.26A1. Affected is the function sprintf of the file /auto_reboot.asp of the component HTTP Handler. This manipulation of the argument enable/time causes buffer overflow. It is possible to initiate the attack remotely. The exploit has been made available to the public and could be used for attacks.
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 · high confidenceBuffer overflow vulnerability in D-Link DI-8100 router firmware (16.07.26A1) where the sprintf function in /auto_reboot.asp handles the 'enable' or 'time' HTTP parameters unsafely. The lack of bounds checking on user-supplied input allows remote attackers to overflow a fixed-size buffer via the HTTP handler.
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= 16.07.26a1CVSS 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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Confirm device model is D-Link DI-8100Access the router web interface and check the device info page, or use nmap to identify the device via HTTP response headers or SNMP. The device model is typically displayed on the status or administration page.Affected if The device is NOT a D-Link DI-8100 router (not affected)
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Check firmware version is 16.07.26a1Log into the router web interface and navigate to Status or System Info page to view the firmware version. Alternatively, check the boot log or use a firmware extraction tool if you have a firmware image.Affected if The firmware version is exactly 16.07.26a1 (affected)
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Verify HTTP service is enabled on the routerAttempt to access the router IP via HTTP (port 80) or HTTPS (port 443) from a client on the same network. Confirm the web interface login page loads.Affected if HTTP/HTTPS service is accessible (vulnerability is reachable)
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Confirm /auto_reboot.asp endpoint existsRequest the URL http://[router-ip]/auto_reboot.asp in a browser or via curl. A successful request returning a page (even an error) indicates the endpoint exists.Affected if The /auto_reboot.asp page is accessible (vulnerable code path exists)
If the device is a D-Link DI-8100 running firmware version 16.07.26a1 and the router web interface with the /auto_reboot.asp endpoint is accessible, the environment is affected by CVE-2026-7853.
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 dataIf patched firmware is unavailable, isolate the device from untrusted networks or replace the device; applying network access controls to limit exposure to the router's web interface may reduce risk until proper remediation.
- Consultation6.0 h
- Implementation24.0 h
- Testing12.0 h
- Review / QA8.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-7853 — 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-2026-7853 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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