# CVE-2026-19891: TRENDnet TEW-WLC100 IKE Phase 1 Aggressive Mode racoon.conf missing encryption

> Remote attackers can intercept sensitive IKE Phase 1 data due to missing encryption in the racoon configuration of TRENDnet wireless controllers.

- **Severity:** Medium 6.3 (`CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 15 Aug 2026
- **Updated:** 17 Aug 2026
- **Also known as:** GHSA-5823-mg62-gvvv

## What is CVE-2026-19891?

CVE-2026-19891 is a medium-severity vulnerability in TRENDnet TEW-WLC100, published on 15 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability was determined in TRENDnet TEW-WLC100 2.05b02. This affects an unknown function of the file /etc/racoon.conf of the component IKE Phase 1 Aggressive Mode. This manipulation of the argument exchange_mode causes missing encryption of sensitive data. It is possible to initiate the attack remotely. The complexity of an attack is rather high. The exploitability is reported as difficult. The vendor was contacted early about this disclosure.

Weakness: CWE-311 (Missing Encryption of Sensitive Data), CWE-310

## Which versions are affected by CVE-2026-19891?


## How do I fix CVE-2026-19891?

No fix has been published for CVE-2026-19891 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-19891 being exploited?

There is no known exploitation of CVE-2026-19891 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-19891 and fix it if it is affected.

What it is: CVE-2026-19891 is a medium-severity vulnerability in TRENDnet TEW-WLC100, published on 15 Aug 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-2026-19891 in the wild and no public exploit code.

Affected product: TRENDnet TEW-WLC100. 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-2026-19891/ (Markdown: https://insights.sbomify.com/CVE-2026-19891/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-19891
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-19891
- OSV: https://osv.dev/vulnerability/CVE-2026-19891

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-19891/
Summaries are generated and may contain mistakes; the official description above is the record.