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Nr1800x Firmware CVE-2026-1328

HIGH
Buffer Overflow (CWE-119)
2026-01-22 cna@vuldb.com
Buffer Overflow Nr1800x Firmware
8.8
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
8.8 HIGH
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

3
Analysis Generated
Mar 12, 2026 - 21:54 vuln.today
PoC Detected
Jan 29, 2026 - 17:47 vuln.today
Public exploit code
CVE Published
Jan 22, 2026 - 15:16 nvd
HIGH 8.8

DescriptionCVE.org

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.

AnalysisAI

Buffer overflow in Totolik NR1800X firmware allows authenticated remote attackers to achieve complete system compromise through malformed SSID parameters in the setWizardCfg POST handler. Public exploit code is available and no patch has been released, leaving affected devices vulnerable to remote code execution. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Authenticate to Totolik NR1800X web interface
Delivery
Send POST request to /cgi-bin/cstecgi.cgi
Exploit
Inject oversized ssid parameter in setWizardCfg
Execution
Trigger buffer overflow
Impact
Execute arbitrary code
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Vulnerability AssessmentAI

Exploitation Totolik NR1800X 9.1.0u.6279_B20210910 router with /cgi-bin/cstecgi.cgi POST handler accessible; attacker requires valid login credentials (PR:L) to setWizardCfg function; default web interface must be enabled. Additional conditions and limiting factors are described in the full assessment.
Risk Assessment CVSS 8.8 (HIGH). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario A remote attacker could exploit this flaw, buffer overflow.
Remediation Monitor vendor advisories for a patch. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 7 days: Identify all affected systems and apply vendor patches promptly. …

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CVE-2026-1328 vulnerability details – vuln.today
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