# CVE-2026-27869: WEB SERVICE (HTTP) DENIAL OF SERVICE VIA SLOW HEADERS ON REGESTA SMART HD-PLC OF TELDAT

> An attacker can cause a denial of service on the web interface of Teldat Regesta Smart HD-PLC devices via a Slow Loris attack.

- **Severity:** Medium 6.9 (`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`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 17 Jun 2026
- **Updated:** 1 Jul 2026
- **Also known as:** GHSA-fg52-hqv7-vcf6

## What is CVE-2026-27869?

CVE-2026-27869 is a medium-severity denial of service vulnerability in Teldat Regesta Smart HD-PLC - TLDPH16D2, published on 17 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

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, with a Slow Loris attack, cause Denial of Service (DoS) on the web interface of the device. This issue affects Regesta Smart HD-PLC - TLDPH16D2: 
11.02.05.10.02.

Weakness: CWE-770 (Allocation of Resources Without Limits or Throttling)

## Which versions are affected by CVE-2026-27869?


## How do I fix CVE-2026-27869?

No fix has been published for CVE-2026-27869 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-27869 being exploited?

There is no known exploitation of CVE-2026-27869 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-27869 and fix it if it is affected.

What it is: CVE-2026-27869 is a medium-severity denial of service vulnerability in Teldat Regesta Smart HD-PLC - TLDPH16D2, published on 17 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-27869 in the wild and no public exploit code.

Affected product: Teldat Regesta Smart HD-PLC - TLDPH16D2. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-27869/ (Markdown: https://insights.sbomify.com/CVE-2026-27869/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-27869
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-27869
- OSV: https://osv.dev/vulnerability/CVE-2026-27869

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-27869/
Summaries are generated and may contain mistakes; the official description above is the record.