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Vulnerability record · CVE-2026-1328 · published 22 January 2026

CVE-2026-1328: Totolink nr1800x firmware memory buffer overflow vulnerability

TTotolink · Nr1800x Firmware

A vulnerability was detected in Totolink NR1800X 9.1.0u.6279_B20210910. Impacted is the function setWizardCfg of the file /cgi-bin/cstecgi.cgi of the component POST Request Handler. Performing a manipulation of the argument ssid results in buffer overflow. The attack may be initiated remotely. The exploit is now public and may be used.

7.4 CVSS 4.0 High EPSS 0.85% · top 43.4% CWE-119 · Memory buffer overflowCWE-120 · Classic buffer overflow
7.4CVSS 4.0 base score, v2 9.0
0.85%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 was detected in Totolink NR1800X 9.1.0u.6279_B20210910. Impacted is the function setWizardCfg of the file /cgi-bin/cstecgi.cgi of the component POST Request Handler. Performing a manipulation of the argument ssid results in buffer overflow. The attack may be initiated remotely. The exploit is now public and may be used.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/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-setWizardCfg-2e453a41781f80568a54c9368082fbe9?source=copy_link ExploitThird Party Advisory
https://vuldb.com/?ctiid.342304 Permissions RequiredVDB Entry
https://vuldb.com/?id.342304 Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.735792 Third Party AdvisoryVDB 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 0.51%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 1.8%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 0.95%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-2025-45842Totolink 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 0.88%8.8CVE-2025-45843Totolink 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 setWiFiGuestCfg funct…EPSS 0.68%

Source: NIST National Vulnerability Database (record CVE-2026-1328), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.