CVE-2023-31587Public exploitNetwork attack vector

Unauthenticated command execution via unsanitized Mac parameter

Published May 16, 2023 · Updated Jan 27, 2025

OS command injection in Tenda AC5 router 15.03.06.28 allows remote attackers to execute commands via the WriteFacMac Mac parameter. The /bin/httpd WriteFacMac handler passes the POST request's Mac value directly to doSystem, allowing shell metacharacters to alter the command. No authentication or user interaction is required; the web interface must be network-reachable, and exploitation can yield an interactive shell.

CVSS severity9.8
Critical
EPSS probability2.00%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Tenda AC5 router 15.03.06.28 allows remote attackers to execute commands via the WriteFacMac Mac parameter. The /bin/httpd WriteFacMac handler passes the POST request's Mac value directly to doSystem, allowing shell metacharacters to alter the command. No authentication or user interaction is required; the web interface must be network-reachable, and exploitation can yield an interactive shell.

The record

CVE
CVE-2023-31587
Published
May 16, 2023
Updated
Jan 27, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1059.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 16, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 27, 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

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 exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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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