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Regesta Smart HD-PLC CVE-2026-27868

| EUVDEUVD-2026-37576 MEDIUM
Insertion of Sensitive Information Into Sent Data (CWE-201)
2026-06-17 HackRTU
PHP Information Disclosure Regesta Smart Hd Plc Tldph16D2
6.9
CVSS 4.0 · Vendor: HackRTU
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Severity by source

Vendor (HackRTU) PRIMARY
6.9 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
5.3 MEDIUM

Network-reachable endpoint requires no authentication and returns only version metadata, so PR:N, AV:N, C:L, and no integrity or availability impact apply.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (HackRTU).

CVSS VectorVendor: HackRTU

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

1
Analysis Generated
Jun 17, 2026 - 10:15 vuln.today

DescriptionCVE.org

An attacker with access via network to the Regesta Smart HD-PLC of the provider Teldat (in this case, NO registration action is required) who has the vulnerable software could obtain privilege information by using the command Version via the path: /upgrade/query.php?cmd=p+3&3Bversion resulting in a information disclosure. This issue affects Regesta Smart HD-PLC - TLDPH16D2: 11.02.05.10.02.

AnalysisAI

Unauthenticated information disclosure in the Teldat Regesta Smart HD-PLC (model TLDPH16D2, firmware 11.02.05.10.02) exposes version and privilege data via a PHP-based upgrade query endpoint accessible over the network without any login or registration. An attacker sends a crafted HTTP request to /upgrade/query.php?cmd=p+3&3Bversion and receives sensitive system metadata in the response, violating CWE-201 by returning information that should be restricted. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Identify network-reachable HD-PLC management interface
Delivery
Send unauthenticated HTTP GET to /upgrade/query.php
Exploit
Supply Version command parameter (cmd=p+3&3Bversion)
Execution
Receive firmware version and privilege metadata in response
Impact
Use version data to identify further exploitable vulnerabilities
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Vulnerability AssessmentAI

Exploitation The CVSS 4.0 vector (PR:N, UI:N, AV:N) confirms that no authentication, registration, or user interaction is required. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 score of 6.9 (AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N) reflects a network-reachable, zero-complexity, unauthenticated flaw with limited confidentiality impact and no integrity or availability consequence. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker with network visibility to the device's HTTP management interface sends a single unauthenticated HTTP GET request to http://[device-ip]/upgrade/query.php?cmd=p+3&3Bversion. The PHP endpoint processes the Version command without validating session state and returns firmware version and privilege-level information in the HTTP response body. …
Remediation A vendor-released patch is available per the HackRTU advisory at https://www.hackrtu.com/blog/CNA-CVE-2026-27868/ and via the Teldat customer support portal at https://support.teldat.com/portal/supportcontent. … Detailed patch versions, workarounds, and compensating controls in full report.
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CVE-2026-27868 vulnerability details – vuln.today
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