PT-2026-36294 · Totolink · Nr1800X

Newym · Published 2026-05-01 · Updated 2026-05-01 · CVE-2026-7548

Positive Technologies (AI Summary)

CVSS v2.0

9.0

High

Base vector

AV:N/AC:L/Au:S/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions Totolink NR1800X version 9.1.0u.6279 B20210910

Description A remote command injection issue exists in the /cgi-bin/cstecgi.cgi endpoint. The flaw is located within the sub 41A68C() function and is triggered by manipulating the setUssd variable.

Recommendations As a temporary workaround, restrict access to the /cgi-bin/cstecgi.cgi endpoint or avoid using the setUssd parameter until a fix is available. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Command Injection

Special Elements Injection

Weakness Enumeration

CWE-77

CWE-74

Related Identifiers

CVE-2026-7548

Affected Products

Nr1800X

References · 11

• 🔥 https://github.com/newym/cve/blob/main/totolink%20nr1800x%20command%20injection.md · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-7548 · Security Note
• https://reddit.com/r/pwnhub/comments/1t0su4o/critical_command_injection_vulnerability_found_in · Reddit Post
• https://totolink.net · Note
• https://t.me/CVEtracker/52385 · Telegram Post
• https://vuldb.com/vuln/360358/cti · Note
• https://twitter.com/CVEarity/status/2050158811642777918 · Twitter Post
• https://twitter.com/CVEnew/status/2050144034631643516 · Twitter Post
• https://t.me/cveNotify/161685 · Telegram Post
• https://vuldb.com/submit/804417 · Note
• https://vuldb.com/vuln/360358 · Note