Is CVE-2026-82555 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-82555 being exploited in the wild.

How severe is CVE-2026-82555?

Low severity, with a CVSS score of 3.7, published 30 August 2026.

Which products and versions are affected?

TOTOLINK N600r 4.3.0cu.7866_B20220506.

Is there a fix for CVE-2026-82555?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-82555 attacked?

It is attacked over the network.

Am I affected by CVE-2026-82555?

Check whether you run TOTOLINK N600r at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-82555: TOTOLINK N600R insufficient randomness in session token generation

CVE-2026-82555 · Severity: low · CVSS 3.7 · Published 2026-08-30

TOTOLINK N600R is a consumer-grade wireless router used to provide network connectivity and security management. The device generates administrative session tokens using a predictable method (MD5 hash of the current Unix timestamp), allowing an unauthenticated attacker to brute-force valid authentication tokens within a short time window and gain complete control of the router. An attacker with this access can modify network settings, change Wi-Fi credentials, install malware, or disconnect users from the network entirely.

Technologies: TOTOLINK N600r. Vendors: TOTOLINK.

Quick answers

Is CVE-2026-82555 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-82555 being exploited in the wild.
How severe is CVE-2026-82555?: Low severity, with a CVSS score of 3.7, published 30 August 2026.
Which products and versions are affected?: TOTOLINK N600r 4.3.0cu.7866_B20220506.
Is there a fix for CVE-2026-82555?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-82555 attacked?: It is attacked over the network.
Am I affected by CVE-2026-82555?: Check whether you run TOTOLINK N600r at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The vulnerability is classified as CWE-330 (Use of Insufficiently Random Values). The loginAuth handler in /web_cste/cgi-bin/cstecgi.cgi generates session tokens by computing MD5(time(NULL)), where time(NULL) returns the Unix timestamp at login. An unauthenticated attacker on the network can brute-force the token within a narrow time window (minutes) since the timestamp space is small and predictable. The attack requires network access but no prior authentication or user interaction. Successful exploitation grants the attacker full administrative privileges over the router, including the ability to read stored credentials (Wi-Fi PSK, PPPoE passwords), modify configuration and firewall rules, and perform denial-of-service. A public proof-of-concept exploit is available.

Affected products

TOTOLINK N600R 4.3.0cu.7866_B20220506

Timeline

2026-08-30: disclosed: CVE published; exploit disclosed to public

References

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