CVE-2026-1327Public exploitNetwork attack vector

Authenticated command execution via traceroute command injection

Published Jan 22, 2026 · Updated Jan 22, 2026

Command injection in TOTOLINK NR1800X firmware 9.1.0u.6279_B20210910 allows remote authenticated users to execute operating-system commands. The setTracerouteCfg function in /cgi-bin/cstecgi.cgi passes the POST request's command value into a shell command without neutralizing shell metacharacters. A low-privileged management session is required, and successful exploitation can read or alter router data or interrupt its services.

CVSS severity8.8
High
EPSS probability2.75%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in TOTOLINK NR1800X firmware 9.1.0u.6279_B20210910 allows remote authenticated users to execute operating-system commands. The setTracerouteCfg function in /cgi-bin/cstecgi.cgi passes the POST request's command value into a shell command without neutralizing shell metacharacters. A low-privileged management session is required, and successful exploitation can read or alter router data or interrupt its services.

The record

CVE
CVE-2026-1327
Published
Jan 22, 2026
Updated
Jan 22, 2026
Vendor
TOTOLINK
Product
NR1800X Firmware
Classifications
CWE-74, CWE-77, T1059.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 22, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=9.1.0u.6279_B20210910

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

TOTOLINK · NR1800X Firmwareversion=9.1.0u.6279_B20210910

Published CVSS scores

8.8NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
2.1VulDB CNACVSS: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
6.3VulDB CNACVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
6.5VulDB CNAAV:N/AC:L/Au:S/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component
CWE-77Command Injection
T1059.004Unix Shell

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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