CVE-2026-27870
CROSS-SITE SCRIPTING (XSS) VIA MALICIOUS FILE UPLOAD ON REGESTA SMART HD-PLC OF TELDAT
Description
An attacker with access via network to the Regesta Smart HD-PLC of the provider Teldat (in this case, registration action IS required) who has the vulnerable software could, introduce arbitrary JavaScript by injecting a Cross-site Scripting (XSS) payload into the 'Hostname' field of the configuration file resulting in a XSS in the path /upgrade/query.php?cmd=p+3%3Bversion. This issue affects Regesta Smart HD-PLC - TLDPH16D2: 11.02.05.10.02.
INFO
Published Date :
June 17, 2026, 1:20 p.m.
Last Modified :
July 1, 2026, 12:16 p.m.
Remotely Exploit :
Yes !
Source :
ffb98d57-deaa-4918-a669-5225ccc13e39
Affected Products
The following products are affected by CVE-2026-27870
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 4.0 | MEDIUM | ffb98d57-deaa-4918-a669-5225ccc13e39 | ||||
| CVSS 4.0 | MEDIUM | ffb98d57-deaa-4918-a669-5225ccc13e39 |
Solution
- Validate and sanitize the 'Hostname' input.
- Implement output encoding for displayed data.
- Update the Regesta Smart HD-PLC software.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-27870.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-27870 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-27870
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-27870 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-27870 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by ffb98d57-deaa-4918-a669-5225ccc13e39
Jul. 01, 2026
Action Type Old Value New Value Added Reference https://www.hackrtu.com/blog/CNA-HRTU-0003/ Removed Reference https://www.hackrtu.com/blog/CNA-HRTU-0002/ -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-27870', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-06-17T12:47:25.070527Z'} -
New CVE Received by ffb98d57-deaa-4918-a669-5225ccc13e39
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Teldat', 'product': 'Regesta Smart HD-PLC - TLDPH16D2', 'versions': [{'status': 'affected', 'version': '11.02.05.10.02'}, {'status': 'unaffected', 'version': '11.02.06.00.02'}], 'defaultStatus': 'unknown'}] Added Description An attacker with access via network to the Regesta Smart HD-PLC of the provider Teldat (in this case, registration action IS required) who has the vulnerable software could, introduce arbitrary JavaScript by injecting a Cross-site Scripting (XSS) payload into the 'Hostname' field of the configuration file resulting in a XSS in the path /upgrade/query.php?cmd=p+3%3Bversion. This issue affects Regesta Smart HD-PLC - TLDPH16D2: 11.02.05.10.02. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:H/UI:P/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 Added CWE CWE-79 Added Reference https://support.teldat.com/images/content/docs/Teldat_dm1087_regesta_smart_nessum_series_installation(1).pdf Added Reference https://support.teldat.com/portal/supportcontent?page=cgs-customer-global-support&none=true&language=en-US Added Reference https://www.hackrtu.com/blog/CNA-CVE-2026-27870/ Added Reference https://www.hackrtu.com/blog/CNA-HRTU-0002/ Added Reference https://www.teldat.com/es/