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Vulnerability record · CVE-2026-5030 · published 29 March 2026

CVE-2026-5030: Totolink nr1800x firmware injection vulnerability

TTotolink · Nr1800x Firmware

A vulnerability has been found in Totolink NR1800X 9.1.0u.6279_B20210910. This issue affects the function NTPSyncWithHost of the file /cgi-bin/cstecgi.cgi of the component Telnet Service. The manipulation of the argument host_time leads to command injection. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.

2.1 CVSS 4.0 Low EPSS 3.7% · top 10.4% CWE-74 · InjectionCWE-77 · Command injection
2.1CVSS 4.0 base score, v2 6.5
3.7%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
5References, 1 tagged exploit
17 Jun 2026Last modified by NVD

Description

A vulnerability has been found in Totolink NR1800X 9.1.0u.6279_B20210910. This issue affects the function NTPSyncWithHost of the file /cgi-bin/cstecgi.cgi of the component Telnet Service. The manipulation of the argument host_time leads to command injection. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://lavender-bicycle-a5a.notion.site/TOTOLINK-NR1800X-NTPSyncWithHost-32153a41781f8032afebc0802b704e9c?source=copy_l ExploitThird Party Advisory
https://vuldb.com/submit/778529 Third Party AdvisoryVDB Entry
https://vuldb.com/vuln/353952 Third Party AdvisoryVDB Entry
https://vuldb.com/vuln/353952/cti Permissions RequiredVDB Entry
https://www.totolink.net/ Product

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2025-45841Totolink nr1800x firmware out-of-bounds write vulnerabilityTOTOLINK NR1800X V9.1.0u.6681_B20230703 was discovered to contain an authenticated stack overflow via the text parameter in the setSmsCfg function.EPSS 0.53%9.8CVE-2023-7220Totolink nr1800x firmware stack-based buffer overflow vulnerabilityA vulnerability was found in Totolink NR1800X 9.1.0u.6279_B20210910 and classified as critical. Affected by this issue is the function loginAuth of t…EPSS 1.5%9.8CVE-2023-36340Totolink nr1800x firmware out-of-bounds write vulnerabilityTOTOLINK NR1800X V9.1.0u.6279_B20210910 was discovered to contain a stack overflow via the http_host parameter in the function loginAuth.EPSS 0.70%9.8CVE-2022-41525Totolink nr1800x firmware os command injection vulnerabilityTOTOLINK NR1800X V9.1.0u.6279_B20210910 was discovered to contain a command injection vulnerability via the OpModeCfg function at /cgi-bin/cstecgi.cg…EPSS 1.9%9.8CVE-2022-41522Totolink nr1800x firmware out-of-bounds write vulnerabilityTOTOLINK NR1800X V9.1.0u.6279_B20210910 was discovered to contain an unauthenticated stack overflow via the "main" function.EPSS 1.1%9.8CVE-2022-41518Totolink nr1800x firmware os command injection vulnerabilityTOTOLINK NR1800X V9.1.0u.6279_B20210910 was discovered to contain a command injection vulnerability via the UploadFirmwareFile function at /cgi-bin/c…EPSS 1.9%8.8CVE-2025-45844Totolink nr1800x firmware out-of-bounds write vulnerabilityTOTOLINK NR1800X V9.1.0u.6681_B20230703 was discovered to contain an authenticated stack overflow via the ssid parameter in the setWiFiBasicCfg funct…EPSS 0.71%8.8CVE-2025-45842Totolink nr1800x firmware out-of-bounds write vulnerabilityTOTOLINK NR1800X V9.1.0u.6681_B20230703 was discovered to contain an authenticated stack overflow via the ssid5g parameter in the setWiFiEasyCfg func…EPSS 0.91%

Source: NIST National Vulnerability Database (record CVE-2026-5030), CISA KEV, FIRST EPSS (scores of 2026-10-16). This page is refreshed as NVD updates the record.