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CVE-2026-34127

4.8 · MEDIUM

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 parame…

Published May 29, 2026CWE-79EPSS 0.36%

Overview

CVE-2026-34127 is a medium-severity vulnerability. It was published on May 29, 2026 and has a CVSS 3.1 base score of 4.8 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 4.8, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refwww.tp-link.com/en/support/download/tl-sg108pe/v5/#FirmwareRefwww.tp-link.com/us/support/download/tl-sg108pe/v5/#FirmwareRefwww.tp-link.com/us/support/faq/5110/

How CyberStrike helps

Frequently asked questions

What is CVE-2026-34127?

CVE-2026-34127 is a medium-severity vulnerability. It was published on May 29, 2026 and has a CVSS 3.1 base score of 4.8 (MEDIUM).

How severe is CVE-2026-34127?

This vulnerability has a CVSS 3.1 base score of 4.8, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-34127?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-34127?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-34127 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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