CVE-2026-35906Public exploitNetwork attack vector

Root command execution via unauthenticated debug CGI

Published Jun 4, 2026 · Updated Jun 4, 2026

OS command execution in T3 Technology T625Pro 1.0.07 and T6825G 1.0.03 allows remote attackers to run commands as root via HTTP. The shortcut_telnet.cgi endpoint URL-decodes the raw query string, writes it to /var/fiberweb_telnet.sh, marks the script executable, and runs it through /bin/sh as root. Direct exploitation requires LAN reachability; Internet-based exploitation requires a user on the target network to visit a malicious page, and root execution permits device takeover.

CVSS severity9.6
Critical
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command execution in T3 Technology T625Pro 1.0.07 and T6825G 1.0.03 allows remote attackers to run commands as root via HTTP. The shortcut_telnet.cgi endpoint URL-decodes the raw query string, writes it to /var/fiberweb_telnet.sh, marks the script executable, and runs it through /bin/sh as root. Direct exploitation requires LAN reachability; Internet-based exploitation requires a user on the target network to visit a malicious page, and root execution permits device takeover.

The record

CVE
CVE-2026-35906
Published
Jun 4, 2026
Updated
Jun 4, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-78, T1059.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 4, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.6CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059.004Command and Scripting Interpreter: Unix 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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