CVE-2026-6989Public exploitNetwork attack vector

Authenticated shell access via Telnet enablement

Published Apr 25, 2026 · Updated Apr 25, 2026

Command injection in the Tenda F453 Telnet Service through 1.0.0.3 allows remote authenticated users to obtain an interactive shell. The TendaTelnet handler at /goform/telnet directly runs system commands that enable and start Telnet when a crafted HTTP request invokes the inadequately protected endpoint. Low-privileged network access is sufficient, and successful exploitation exposes an interactive shell for arbitrary system-command execution.

CVSS severity8.8
High
EPSS probability2.90%
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 the Tenda F453 Telnet Service through 1.0.0.3 allows remote authenticated users to obtain an interactive shell. The TendaTelnet handler at /goform/telnet directly runs system commands that enable and start Telnet when a crafted HTTP request invokes the inadequately protected endpoint. Low-privileged network access is sufficient, and successful exploitation exposes an interactive shell for arbitrary system-command execution.

The record

CVE
CVE-2026-6989
Published
Apr 25, 2026
Updated
Apr 25, 2026
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
F453
Classifications
CWE-77, CWE-74, T1059, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 25, 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=1.0.0.0
  2. Affected versionversion=1.0.0.1
  3. Affected versionversion=1.0.0.2
  4. Affected versionversion=1.0.0.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · F453version=1.0.0.0; version=1.0.0.1; version=1.0.0.2; version=1.0.0.3

Published CVSS scores

2.1VulDBCVSS: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
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P
6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
T1059Command and Scripting Interpreter
T1190Exploit Public-Facing Application

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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