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CVE-2023-34354VulnerabilityPublished Updated

CVE-2023-34354: Peplink Surf SOHO HW1 · Basic XSS

Affects Peplink Surf SOHO HW1Source CVE Database V5

0

Not known to be exploited · CVSS 3.4 Low.

Data as of 26 Oct 2026, 06:26 UTC

CVSS 3.1 base score
3.4Low
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.8% chance of exploitation in 30 days – higher than 56% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:N/A:N

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 2026-10-26.

What to do

AI-suggested

1. Restrict access to the Peplink Surf SOHO HW1 management interface by implementing network segmentation and firewall rules to limit access to trusted IP addresses only. 2. Enforce strong authentication mechanisms, including complex passwords and, if supported, multi-factor authentication to reduce the risk of unauthorized access. 3. Monitor device logs and network traffic for unusual or suspicious HTTP requests targeting the upload_brand.cgi endpoint. 4. Educate users with access to the device management interface about the risks of XSS and the importance of not interacting with suspicious links or content. 5. Regularly check for and apply firmware updates or patches from Peplink as soon as they become available to address this and other vulnerabilities. 6. Consider deploying web application firewalls (WAFs) or intrusion detection/prevention systems (IDS/IPS) that can detect and block malicious payloads targeting the device. 7. If possible, disable or restrict the upload_brand.cgi functionality if it is not required for business operations to reduce the attack surface.

Description

A stored cross-site scripting (XSS) vulnerability exists in the upload_brand.cgi functionality of peplink Surf SOHO HW1 v6.3.5 (in QEMU). A specially crafted HTTP request can lead to execution of arbitrary javascript in another user's browser. An attacker can make an authenticated HTTP request to trigger this vulnerability.

References

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