CVE-2026-27870 json
CROSS-SITE SCRIPTING (XSS) VIA MALICIOUS FILE UPLOAD ON REGESTA SMART HD-PLC OF TELDAT
published 2026-06-17 4 mo ago modified 2026-10-26 13 d ago also EUVD-2026-37577
- cvss
- 4.8
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 22%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- Teldat Regesta Smart HD-PLC - TLDPH16D2 11.02.06.00.02
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 4 mo ago
Exploit prediction
0.29% chance of exploitation in the next 30 days, higher than 22% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 4.8 | CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N |
| CNA | 4.0 | 4.8 | CVSS:4.0/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 |
Affected products
- Teldat Regesta Smart HD-PLC - TLDPH16D2
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
hackrtu.com
/blog/CNA-HRTU-0003/
technical-description, patch
-
hackrtu.com
/blog/CNA-CVE-2026-27870/
technical-description, patch
-
support.teldat.com
/portal/supportcontent?page=cgs-customer-global-support&none=true&language=en-US
patch
-
teldat.com
/es/
product
-
support.teldat.com
/images/content/docs/Teldat_dm1087_regesta_smart_nessum_series_installation(1).pdf
product
Sources
- CVE List CVE-2026-27870
- NVD CVE-2026-27870
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