PHOENIX CONTACT: Denial-of-Service due to malicious XML files in TC ROUTER, TC CLOUD CLIENT and CLOUD CLIENT
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 authenticated remote attacker with admin privileges could upload a crafted XML file which causes a denial-of-service.
- Published
- Aug 8, 2023
- Updated
- Jun 17, 2026
- EPSS
- 1.4% · 72th percentile
- CWE
- CWE-776
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Report tools
Action score
19
Monitor
Low priority for now.
- CVSS
- 19 / 40 · 4.9 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 1.4%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- —
- CNA · CERTVDE
- 4.9
- NVD has not scored this yet; the score shown is the CNA’s.
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| phoenixcontact | cloud client 1101t-tx firmware | cpe:2.3:o:phoenixcontact:cloud_client_1101t-tx_firmware |
| phoenixcontact | cloud client 1101t-tx | cpe:2.3:h:phoenixcontact:cloud_client_1101t-tx |
| phoenixcontact | tc cloud client 1002-4g att firmware | cpe:2.3:o:phoenixcontact:tc_cloud_client_1002-4g_att_firmware |
| phoenixcontact | tc cloud client 1002-4g att | cpe:2.3:h:phoenixcontact:tc_cloud_client_1002-4g_att |
| phoenixcontact | tc cloud client 1002-4g firmware | cpe:2.3:o:phoenixcontact:tc_cloud_client_1002-4g_firmware |
| phoenixcontact | tc cloud client 1002-4g | cpe:2.3:h:phoenixcontact:tc_cloud_client_1002-4g |
| phoenixcontact | tc cloud client 1002-4g vzw firmware | cpe:2.3:o:phoenixcontact:tc_cloud_client_1002-4g_vzw_firmware |
| phoenixcontact | tc cloud client 1002-4g vzw | cpe:2.3:h:phoenixcontact:tc_cloud_client_1002-4g_vzw |
| phoenixcontact | tc router 3002t-4g att firmware | cpe:2.3:o:phoenixcontact:tc_router_3002t-4g_att_firmware |
| phoenixcontact | tc router 3002t-4g att | cpe:2.3:h:phoenixcontact:tc_router_3002t-4g_att |
| phoenixcontact | tc router 3002t-4g firmware | cpe:2.3:o:phoenixcontact:tc_router_3002t-4g_firmware |
| phoenixcontact | tc router 3002t-4g | cpe:2.3:h:phoenixcontact:tc_router_3002t-4g |
and 2 more
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- phoenixcontact cloud client 1101t-tx firmwarebefore 2.06.10
- phoenixcontact tc cloud client 1002-4g att firmwarebefore 2.07.2
- phoenixcontact tc cloud client 1002-4g firmwarebefore 2.07.2
- phoenixcontact tc cloud client 1002-4g vzw firmwarebefore 2.07.2
- phoenixcontact tc router 3002t-4g att firmwarebefore 2.07.2
- phoenixcontact tc router 3002t-4g firmwarebefore 2.07.2
- phoenixcontact tc router 3002t-4g vzw firmwarebefore 2.07.2
Versions reported by the vendor
Affected version ranges reported by the assigning authority (CERTVDE). Independent of NVD's CPE analysis and usually ahead of it.
PHOENIX CONTACT CLOUD CLIENT 1101T-TX/TX
- before 2.06.10affected · semver
PHOENIX CONTACT TC CLOUD CLIENT 1002-4G
- before 2.07.2affected · semver
PHOENIX CONTACT TC CLOUD CLIENT 1002-4G ATT
- before 2.07.2affected · semver
PHOENIX CONTACT TC CLOUD CLIENT 1002-4G VZW
- before 2.07.2affected · semver
PHOENIX CONTACT TC ROUTER 3002T-4G
- before 2.07.2affected · semver
PHOENIX CONTACT TC ROUTER 3002T-4G ATT
- before 2.07.2affected · semver
PHOENIX CONTACT TC ROUTER 3002T-4G VZW
- before 2.07.2affected · semver
Same product
phoenixcontact: all recordsOther highest-scoring records for the same primary product.
- CVE-2023-3526PHOENIX CONTACT: Cross-site Scripting vulnerability in TC ROUTER, TC CLOUD CLIENT and CLOUD CLIENT devices39Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| PHOENIX CONTACT CLOUD CLIENT 1101T-TX/TX | 2.06.10 | Vendor (CNA) |
| PHOENIX CONTACT TC CLOUD CLIENT 1002-4G | 2.07.2 | Vendor (CNA) |
| PHOENIX CONTACT TC CLOUD CLIENT 1002-4G ATT | 2.07.2 | Vendor (CNA) |
| PHOENIX CONTACT TC CLOUD CLIENT 1002-4G VZW | 2.07.2 | Vendor (CNA) |
| PHOENIX CONTACT TC ROUTER 3002T-4G | 2.07.2 | Vendor (CNA) |
| PHOENIX CONTACT TC ROUTER 3002T-4G ATT | 2.07.2 | Vendor (CNA) |
| PHOENIX CONTACT TC ROUTER 3002T-4G VZW | 2.07.2 | Vendor (CNA) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- Administrator privileges are required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- High
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-776 · Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
nvd-secondary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
ATT&CK techniques
—
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- packetstormsecurity.com/files/174152/Phoenix-Contact-TC-Cloud-TC-Router-2.x-XSS-Memory-Consumption.html
- seclists.org/fulldisclosure/2023/Aug/12
- cert.vde.com/en/advisories/VDE-2023-017
Vendor advisories and official records. Exploit/PoC links are deliberately left out.