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Cloud Client 1101t Tx FirmwareOperating system · Phoenixcontact

CVE-2023-3526

CRITICAL · 9.6 CVSS v3.1 Published 2023-08-08
Fix available
A fix is available. Upgrade to 2.06.10 / 2.07.2 or later.
See remediation →
100/100
Remediation priority · Urgent
Public exploit Remotely reachable No privileges

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
In PHOENIX CONTACTs TC ROUTER and TC CLOUD CLIENT in versions prior to 2.07.2 as well as CLOUD CLIENT 1101T-TX/TX prior to 2.06.10 an unauthenticated remote attacker could use a reflective XSS within the license viewer page of the devices in order to execute code in the context of the user's browser.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis
How this class of weakness works · CWE-79

Untrusted input is placed into a web page without being neutralised, so an attacker's markup or script executes in another user's browser. That can hijack sessions, capture keystrokes, or silently perform actions as the victim. Fixing it properly means context-aware output encoding everywhere data meets HTML, backed by a content-security policy as a second line of defence.

General guidance for the cross-site scripting (xss) class — the official description and references above are authoritative for this specific CVE. Want a bespoke review and a reviewed fix? Ask our team →

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Cloud Client 1101t Tx FirmwareOperating system
Affected:< 2.06.10
Tc Cloud Client 1002 4g Att FirmwareOperating system
Affected:< 2.07.2
Tc Cloud Client 1002 4g FirmwareOperating system
Affected:< 2.07.2
Tc Cloud Client 1002 4g Vzw FirmwareOperating system
Affected:< 2.07.2
Tc Router 3002t 4g Att FirmwareOperating system
Affected:< 2.07.2
Tc Router 3002t 4g FirmwareOperating system
Affected:< 2.07.2
Tc Router 3002t 4g Vzw FirmwareOperating system
Affected:< 2.07.2

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 2.06.10 / 2.07.2 or later
Fixed in 2.06.102.07.2
Recommended fix High confidence

Cloud Client 1101T-TX: firmware 2.06.10 or later; TC Cloud Client 1002 4g (all variants): firmware 2.07.2 or later; TC Router 3002t 4g (all variants): firmware 2.07.2 or later

  1. 1. Identify the exact model and current firmware version of the affected Phoenix Contact device
  2. 2. Navigate to the official Phoenix Contact download portal or support page for TC ROUTER and TC CLOUD CLIENT products
  3. 3. Download the appropriate firmware version: for Cloud Client 1101T-TX use version 2.06.10 or later; for TC Cloud Client 1002 4g and TC Router 3002t 4g (all variants) use version 2.07.2 or later
  4. 4. Review the firmware upgrade instructions in the product manual
  5. 5. Backup current device configuration if supported
  6. 6. Upload and apply the new firmware through the device's web interface or management console
  7. 7. Verify the device is running the patched firmware version after reboot
  8. 8. Test that the license viewer page functions normally and the XSS vulnerability is no longer present
Caveat Firmware upgrades may temporarily disrupt network connectivity; review release notes for any configuration changes or compatibility considerations

Generated from the published advisory — verify against the referenced sources before acting.

We can perform the upgrade in your staging environment and verify nothing breaks — typical engagement from $1,600. Get the upgrade done

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2023-3526 in production — separate from our analysis above.

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What this is

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What belongs here
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  • Version or environment caveats, and links to real fixes
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