Vulnerability · Published Aug 30, 2026 · Assigned by VulDB

CVE-2026-82555TOTOLINK N600R Authentication cstecgi.cgi loginAuth random values

Low 3.7

In plain English

A low-severity weak randomness in N600R from TOTOLINK. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 52% of all known vulnerabilities).

Severity (CVSS 3.1)3.7Low

Exploit odds (30 days)0.7%top 48.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A vulnerability has been found in TOTOLINK N600R 4.3.0cu.7866_B20220506. This vulnerability affects the function loginAuth of the file /web_cste/cgi-bin/cstecgi.cgi of the component Authentication Handler. Such manipulation leads to insufficiently random values. It is possible to launch the attack remotely. This attack is characterized by high complexity. It is stated that the exploitability is difficult. The exploit has been disclosed to the public and may be used.

Affected products (as reported)

Vendor	Product	Versions
TOTOLINK	N600R	4.3.0cu.7866_B20220506

Weakness: CWE-330, CWE-310 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R

References

VDB-397071 | TOTOLINK N600R Authentication cstecgi.cgi loginAuth random values vdb-entry, technical-description
VDB-397071 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
CVE-2026-82555 | CVE Analysis and Report third-party-advisory
Submit #891698 | TOTOLINK N600R v4.3.0cu.7866_B20220506 Use of Insufficiently Random Values third-party-advisory
https://github.com/b1uerry/cves/tree/main/TOTOLINK/N600R/TOTOLINK_N600R_predictable-token related
https://github.com/b1uerry/cves/blob/main/TOTOLINK/N600R/TOTOLINK_N600R_predictable-token/poc.py exploit
https://www.totolink.net/ product