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EPSS 0.2%top 85%

CVE-2026-34127: CWE-79 Improper neutralization of input during web page generation ('cross-site scripting') in TP-Link Systems Inc. TL-SG108PE v5

0
Medium
VulnerabilityCVE-2026-34127cvecve-2026-34127cwe-79
Published: 05/29/2026 (05/29/2026, 18:59:14 UTC)
Source: CVE Database V5
Vendor/Project: TP-Link Systems Inc.
Product: TL-SG108PE v5

Description

CVE-2026-34127 is a stored cross-site scripting (XSS) vulnerability in the web management interface of the TP-Link TL-SG108PE v5 switch. It arises from improper sanitization of the SYSNAM configuration parameter during configuration file import. An attacker with administrator privileges can inject malicious scripts into the device configuration, which execute in the administrator's browser when viewing the affected interface. Exploitation could lead to session cookie theft, unauthorized configuration changes, or exposure of sensitive information. The vulnerability has a medium severity with a CVSS score of 5.3. No patch or official remediation guidance has been provided by the vendor as of the publication date. No known exploits are reported in the wild.

CVSS v4.0

Score 5.3medium

Attack Vector
Adjacent Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
High
User Interaction
Passive
Vuln. Confidentiality
High
Vuln. Integrity
Low
Vuln. Availability
High
Subsq. Confidentiality
Low
Subsq. Integrity
None
Subsq. Availability
Low
CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:P/VC:H/VI:L/VA:H/SC:L/SI:N/SA:L

Affected software

Affected versions
=5

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 06/05/2026, 21:19:43 UTC

Technical Analysis

This vulnerability involves improper neutralization of input (CWE-79) in the TL-SG108PE v5 switch's web management interface. Specifically, the SYSNAM parameter is not properly sanitized during configuration file import, enabling stored XSS attacks. An attacker with administrator access can embed malicious scripts that persist in the device configuration and execute in the context of the administrator's browser. This can compromise session integrity and device management security. The CVSS 4.0 vector indicates the attack requires adjacent network access, low attack complexity, no attack vector privileges, and user interaction is required. The vulnerability is published but lacks an official fix or patch from TP-Link.

Potential Impact

Successful exploitation allows an attacker with administrator privileges to execute arbitrary scripts in the administrator's browser session. This can result in theft of session cookies, unauthorized changes to device configuration, and access to sensitive information exposed via the management interface. The impact is limited to administrators who interact with the vulnerable interface and have the ability to import configuration files. The medium CVSS score reflects moderate risk due to required privileges and user interaction.

Mitigation Recommendations

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, administrators should exercise caution when importing configuration files and restrict administrative access to trusted personnel only. Monitoring for suspicious configuration changes may help detect exploitation attempts. No official patch or workaround has been provided by TP-Link at this time.

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Technical Details

Data Version
5.2
Assigner Short Name
TPLink
Date Reserved
2026-03-25T18:54:03.344Z
Cvss Version
4.0
State
PUBLISHED
Remediation Level
null

Threat ID: 6a19e68ee29bf47b50037d57

Added to database: 05/29/2026, 19:18:38 UTC

Last enriched: 06/05/2026, 21:19:43 UTC

Last updated: 07/31/2026, 19:22:58 UTC

Views: 71

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