# CVE-2026-61884: Tycon Systems TPDIN-Monitor-WEB2 Missing Authentication for Critical Function

> Unconfigured Tycon Systems TPDIN-Monitor-WEB2 devices allow unauthenticated attackers to control power relays and network settings, risking infrastructure disruption.

- **Severity:** Critical 9.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/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:** 24 Jul 2026
- **Updated:** 4 Sep 2026
- **Also known as:** GHSA-jmfc-m78f-w5vj

## What is CVE-2026-61884?

CVE-2026-61884 is a critical missing authorization vulnerability in Tycon Systems TPDIN-Monitor-WEB2, published on 24 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Tycon Systems TPDIN-Monitor-WEB2
ships without HTTP credentials configured, intended for an installer to set them on first use. On firmware 2.4.4 and earlier, a unit left in this unconfigured state serves the web management interface without requiring any login. An attacker with network access to such a unit can reach full device controls, including power relay management, device reboot, remote access service configuration, and network settings, which could allow disruption of connected infrastructure or physical damage to equipment.

Weakness: CWE-306 (Missing Authentication for Critical Functionality)

## Which versions are affected by CVE-2026-61884?


## How do I fix CVE-2026-61884?

No fix has been published for CVE-2026-61884 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-61884 being exploited?

There is no known exploitation of CVE-2026-61884 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-61884 and fix it if it is affected.

What it is: CVE-2026-61884 is a critical missing authorization vulnerability in Tycon Systems TPDIN-Monitor-WEB2, published on 24 Jul 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-2026-61884 in the wild and no public exploit code.

Affected product: Tycon Systems TPDIN-Monitor-WEB2. 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-2026-61884/ (Markdown: https://insights.sbomify.com/CVE-2026-61884/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-61884
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-61884
- OSV: https://osv.dev/vulnerability/CVE-2026-61884

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-61884/
Summaries are generated and may contain mistakes; the official description above is the record.