CVE-2023-34354: Peplink Surf SOHO HW1 · Basic XSS
Affects Peplink Surf SOHO HW1Source CVE Database V5
Not known to be exploited · CVSS 3.4 Low.
Data as of 26 Oct 2026, 14:05 UTC
- 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:NExploitation evidence
Disclosed: evidence found.
CVE published 11 Oct 2023
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
- 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.
- Enforce strong authentication mechanisms, including complex passwords and, if supported, multi-factor authentication to reduce the risk of unauthorized access.
- Monitor device logs and network traffic for unusual or suspicious HTTP requests targeting the upload_brand.cgi endpoint.
- 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.
- Regularly check for and apply firmware updates or patches from Peplink as soon as they become available to address this and other vulnerabilities.
- Consider deploying web application firewalls (WAFs) or intrusion detection/prevention systems (IDS/IPS) that can detect and block malicious payloads targeting the device.
- 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.