Browser actions via stored trunk-name script
Published Mar 18, 2026 · Updated Mar 18, 2026
Stored XSS in the Link Aggregation interface of Phoenix Contact FL NAT and FL SWITCH firmware before 3.53 allows remote attackers to run script. The interface stores unneutralized HTML or JavaScript in a trunk entry name and later renders that value in the management page, executing it in a viewer's browser. No authentication is needed to create the entry, but an authenticated user must view the page; httpOnly protects the session cookie, bounding impact to browser-context actions such as interface manipulation.
Summary
What happened
Stored XSS in the Link Aggregation interface of Phoenix Contact FL NAT and FL SWITCH firmware before 3.53 allows remote attackers to run script. The interface stores unneutralized HTML or JavaScript in a trunk entry name and later renders that value in the management page, executing it in a viewer's browser. No authentication is needed to create the entry, but an authenticated user must view the page; httpOnly protects the session cookie, bounding impact to browser-context actions such as interface manipulation.
The record
- CVE
- CVE-2026-22322
- Published
- Mar 18, 2026
- Updated
- Mar 18, 2026
- Vendor
- Phoenix Contact
- Product
- FL SWITCH 2204-2TC-2SFX
- Classifications
- CWE-79, T1203
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 18, 2026CVE publishedPublication date reported by the CVE source.
- Mar 18, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0.0.0 <3.53
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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