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VulnerabilityPublished Updated

CVE-2023-28381: Peplink Surf SOHO HW1 · OS Command Injection

Affects Peplink Surf SOHO HW1Source CVE Database V5

0

Not known to be exploited · CVSS 7.2 High.

Data as of 26 Oct 2026, 17:16 UTC

CVSS 3.1 base score
7.2High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
6.0% chance of exploitation in 30 days – higher than 93% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 11 Oct 2023

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

AI-suggested

  1. Immediately restrict administrative access to the Peplink Surf SOHO HW1 devices by limiting management interfaces to trusted IP addresses and enforcing strong authentication mechanisms such as multi-factor authentication.
  2. Monitor network traffic and device logs for unusual or unauthorized administrative requests, particularly those targeting the admin.cgi endpoint.
  3. Segregate management interfaces from general network traffic using VLANs or dedicated management networks to reduce exposure.
  4. Regularly audit and update device credentials to prevent unauthorized access.
  5. Engage with Peplink support or vendor channels to obtain and apply security patches or firmware updates addressing CVE-2023-28381 as soon as they become available.
  6. Consider deploying intrusion detection/prevention systems capable of identifying command injection attempts targeting known vulnerable endpoints.
  7. For environments where patching is delayed, implement compensating controls such as network-level filtering of HTTP requests to the vulnerable functionality and enhanced endpoint security monitoring.

Description

An OS command injection vulnerability exists in the admin.cgi MVPN_trial_init functionality of peplink Surf SOHO HW1 v6.3.5 (in QEMU). A specially crafted HTTP request can lead to command execution. An attacker can make an authenticated HTTP request to trigger this vulnerability.

References

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