CVE-2023-34356Public exploitNetwork attack vector

Authenticated root command execution via unchecked domain

Published Oct 11, 2023 · Updated Nov 4, 2025

OS command injection in Peplink Surf SOHO firmware 6.3.5 allows remote authenticated users to execute root commands via HTTP. The data.cgi view_domain function inserts the attacker-controlled domain POST parameter into a dns_import shell command and passes it to popen without shell-character validation. Reaching the xfer_dns view_domain path requires authentication with device write privileges; successful injection executes arbitrary commands as root.

CVSS severity7.2
High
EPSS probability5.51%
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 Peplink Surf SOHO firmware 6.3.5 allows remote authenticated users to execute root commands via HTTP. The data.cgi view_domain function inserts the attacker-controlled domain POST parameter into a dns_import shell command and passes it to popen without shell-character validation. Reaching the xfer_dns view_domain path requires authentication with device write privileges; successful injection executes arbitrary commands as root.

The record

CVE
CVE-2023-34356
Published
Oct 11, 2023
Updated
Nov 4, 2025
Vendor
Peplink
Product
Surf SOHO MK3
Classifications
CWE-78, T1059.004
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Oct 11, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 4, 2025Record 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=v6.3.5 (in QEMU)

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Peplink · Surf SOHO MK3version=v6.3.5 (in QEMU)
Peplink · Pepwave Surf SOHOversion=hw1 <=v6.35

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.2Cisco TalosCVSS:3.1/AV:N/AC:L/PR:H/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.

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command 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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