CVE-2026-34127 Stored Cross-Site Scripting (XSS) via Configuration File Import on TP-Link's TL-SG108PE
An attacker with admin access can inject scripts via configuration import, leading to session theft or unauthorized changes in the web interface.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-34127?
CVE-2026-34127 is a medium-severity cross-site scripting vulnerability in TP-Link Systems Inc. TL-SG108PE v5, published on 29 May 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
A stored cross-site scripting (XSS) vulnerability has been identified in the web management interface of TP-Link's TL-SG108PE v5 switch due to improper sanitation of the SYSNAM configuration parameter during configuration file import. An attacker with administrator access can inject malicious script into the device configuration, which may be stored and executed in the administrator’s browser when the affected interface is viewed.
Successful exploitation may allow session cookie theft, unauthorized configuration changes, or access to sensitive information exposed through the management interface.
Weakness: CWE-79
Which versions are affected by CVE-2026-34127?
It affects 1 product.
Products include Tp-Link Tl-Sg108pe Firmware.
How do I fix CVE-2026-34127?
No fix has been published for CVE-2026-34127 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-34127 being exploited?
There is no known exploitation of CVE-2026-34127 in the wild and no public exploit code.
Sources
Also known as GHSA-pmw4-462f-6fp3.