# CVE-2026-6058: Cross-site scripting in WRE6505 v2 firmware

> An adjacent attacker can cause a denial-of-service in the web interface by tricking an admin into visiting a page with a malformed SSID.

- **Severity:** Medium 4.5 (`CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 21 Apr 2026
- **Updated:** 21 Apr 2026
- **Also known as:** GHSA-xj2v-mgxg-mcm4

## What is CVE-2026-6058?

CVE-2026-6058 is a medium-severity cross-site scripting vulnerability in Zyxel WRE6505 v2 firmware, published on 21 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

** UNSUPPORTED WHEN ASSIGNED ** An improper encoding or escaping vulnerability in the CGI program of Zyxel WRE6505 v2 firmware version V1.00(ABDV.3)C0 could allow an adjacent attacker on the WLAN to cause a denial-of-service (DoS) condition in the web management interface by convincing an authenticated administrator to visit the “AP Select” page while a malformed SSID is present.

Weakness: CWE-116 (Improper Encoding or Escaping of Output)

## Which versions are affected by CVE-2026-6058?

It affects 1 product.


Products: Zyxel Wre6505 Firmware.

## How do I fix CVE-2026-6058?

No fix has been published for CVE-2026-6058 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-6058 being exploited?

There is no known exploitation of CVE-2026-6058 in the wild and no public exploit code.

## Other vulnerabilities in Zyxel WRE6505 v2 firmware

- [CVE-2017-7964](https://insights.sbomify.com/CVE-2017-7964/): Hardcoded credentials in n/a (critical 10.0)
- [CVE-2026-7256](https://insights.sbomify.com/CVE-2026-7256/): Command injection in WRE6505 v2 firmware (high 8.8)
- [CVE-2026-7255](https://insights.sbomify.com/CVE-2026-7255/): Auth bypass in WRE6505 v2 firmware (medium 6.5)
- [CVE-2026-7257](https://insights.sbomify.com/CVE-2026-7257/): Information disclosure in WRE6505 v2 firmware (medium 4.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-6058 and fix it if it is affected.

What it is: CVE-2026-6058 is a medium-severity cross-site scripting vulnerability in Zyxel WRE6505 v2 firmware, published on 21 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-6058 in the wild and no public exploit code.

Affected product: Zyxel WRE6505 v2 firmware. 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-2026-6058/ (Markdown: https://insights.sbomify.com/CVE-2026-6058/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-6058
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-6058
- OSV: https://osv.dev/vulnerability/CVE-2026-6058

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-6058/
Summaries are generated and may contain mistakes; the official description above is the record.