CVE-2023-27076Known exploitationPublic exploitNetwork attack vector

Unauthenticated command execution via unsanitized language parameter

Published Apr 10, 2023 · Updated May 5, 2025

Command injection in Tenda G103 firmware 1.0.0.5 allows remote attackers to execute arbitrary commands via the language parameter. The cgi-bin/luci interface fails to sanitize the language value before using it in a command context. No authentication or user interaction is required, and successful exploitation gives control of the device for botnet activity.

CVSS severity9.8
Critical
EPSS probability22.93%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in Tenda G103 firmware 1.0.0.5 allows remote attackers to execute arbitrary commands via the language parameter. The cgi-bin/luci interface fails to sanitize the language value before using it in a command context. No authentication or user interaction is required, and successful exploitation gives control of the device for botnet activity.

The record

CVE
CVE-2023-27076
Published
Apr 10, 2023
Updated
May 5, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-78, T1059
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 10, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 10, 2023Exploitation reportedIZ1H9 botnet exploitation
  3. May 5, 2025Record 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

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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.

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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 exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter

Public exploit references

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Reported exploitation

Technologies

Your stack

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Your stack

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