PatchSiren cyber security CVE debrief

CVE-2026-27869 Teldat CVE debrief

CVE-2026-27869 is a medium-severity vulnerability in the Regesta Smart HD-PLC device by Teldat. An attacker with network access can exploit this vulnerability using a Slow Loris attack, causing a Denial of Service (DoS) on the device's web interface. The affected software version is 11.02.05.10.02. This issue was published on June 17, 2026, and last modified on the same day. The CVSS score for this vulnerability is 6.9, indicating a medium severity level. Organizations using the affected device should take immediate action to mitigate this vulnerability.

Vendor: Teldat
Product: Regesta Smart HD-PLC - TLDPH16D2
CVSS: MEDIUM 6.9
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-06-17
Original CVE updated: 2026-07-01
Advisory published: 2026-06-17
Advisory updated: 2026-07-01

Who should care

Organizations using the Regesta Smart HD-PLC device, specifically version 11.02.05.10.02, should be aware of this vulnerability and take necessary precautions to prevent exploitation. This includes ensuring that the device is properly configured and monitored for suspicious activity.

Technical summary

The CVE-2026-27869 vulnerability affects the Regesta Smart HD-PLC device by Teldat. An attacker with network access can exploit this vulnerability using a Slow Loris attack, which involves sending a large number of HTTP requests to the device's web interface, causing it to become unresponsive. The affected software version is 11.02.05.10.02. The CVSS vector for this vulnerability is CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/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.

Defensive priority

medium

Recommended defensive actions

Update the device software to the latest version, if available.
Implement network segmentation to limit access to the device.
Configure the device's web interface to only allow access from trusted IP addresses.
Monitor the device's logs for suspicious activity.
Implement rate limiting on the device's web interface to prevent Slow Loris attacks.
Consider using a web application firewall (WAF) to detect and prevent attacks.

Evidence notes

The information provided is based on the CVE-2026-27869 record from the National Vulnerability Database (NVD) and the vendor's documentation. The CVE record was published on June 17, 2026, and last modified on the same day. The vendor's documentation provides additional information on the affected device and software version.

Sources and references

Verified primary and authoritative sources

CVE-2026-27869 CVE Program record
Publisher, destination, and source semantics verified

URL: https://www.cve.org/CVERecord?id=CVE-2026-27869

CVE Program - Official CVE Program record with source-provided CVE metadata.
CVE-2026-27869 NVD vulnerability detail
Publisher, destination, and source semantics verified

URL: https://nvd.nist.gov/vuln/detail/CVE-2026-27869

NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Source reference
Unverified legacy reference

URL: https://support.teldat.com/images/content/docs/Teldat_dm1087_regesta_smart_nessum_series_installation(1).pdf

ffb98d57-deaa-4918-a669-5225ccc13e39
Source reference
Unverified legacy reference

URL: https://www.hackrtu.com/blog/CNA-CVE-2026-27869/

ffb98d57-deaa-4918-a669-5225ccc13e39
Source reference
Unverified legacy reference

URL: https://www.hackrtu.com/blog/CNA-HRTU-0002/

ffb98d57-deaa-4918-a669-5225ccc13e39
Source reference
Unverified legacy reference

URL: https://www.teldat.com/es/

ffb98d57-deaa-4918-a669-5225ccc13e39

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.