CVE-2026-34127: A stored cross-site scripting (XSS) vulnerability has been identified in the web management interface of TP-Li

Routine

MEDIUM 4.8MITIGATE

CVE-2026-34127 is a medium-severity flaw (CVSS 4.8) affecting tl-sg108pe firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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. Succes

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	4.8 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	Required
EPSS exploit chance	0.2% (top 85%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-05-29
Last modified	2026-07-22

Publisher (CNA): TPLink · Vendor: tp-link

Last updated 2026-07-22 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-29 20:16 UTCPublished CVE record published
2026-07-22 06:10 UTCUpdated Record last modified

tp-link tl-sg108pe firmware MITIGATE

Affected: 1.0.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.1

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-34127?

tl-sg108pe firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-34127 being exploited?

CVE-2026-34127 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-34127 affect?

CVE-2026-34127 affects tl-sg108pe firmware. Severity is medium (CVSS 4.8). 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 at

How urgent is CVE-2026-34127?

Priority 21/100. No elevated risk signals yet.

Software pages

TP-Link vulnerabilities

References

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