# CVE-2008-1527: Auth bypass in n/a

> Remote attackers can bypass authentication on ZyXEL Prestige routers by replaying a captured hash string, gaining unauthorized access.

- **Severity:** High 7.5 (`AV:N/AC:L/Au:N/C:P/I:P/A:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 26 Mar 2008
- **Updated:** 7 Aug 2024
- **Also known as:** GHSA-rqr6-f773-2wgq

## What is CVE-2008-1527?

CVE-2008-1527 is a high-severity authentication bypass vulnerability in n/a, published on 26 Mar 2008. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

ZyXEL Prestige routers, including P-660, P-661, and P-662 models with firmware 3.40(PE9) and 3.40(AGD.2) through 3.40(AHQ.3), support authentication over HTTP via a hash string in the hiddenPassword field, which allows remote attackers to obtain access via a replay attack.

Weakness: CWE-310

## Which versions are affected by CVE-2008-1527?

It affects 3 products.


Products: Zyxel Prestige 660, Zyxel Prestige 661, Zyxel Zynos.

## How do I fix CVE-2008-1527?

No fix has been published for CVE-2008-1527 yet. Limit exposure of the affected software until one is available.

## Is CVE-2008-1527 being exploited?

There is no known exploitation of CVE-2008-1527 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2008-1522](https://insights.sbomify.com/CVE-2008-1522/): Hardcoded credentials in n/a (high 7.5)
- [CVE-2008-1524](https://insights.sbomify.com/CVE-2008-1524/): Misconfiguration in n/a (high 7.5)
- [CVE-2008-1521](https://insights.sbomify.com/CVE-2008-1521/): Missing authorization in n/a (medium 6.5)
- [CVE-2008-1523](https://insights.sbomify.com/CVE-2008-1523/): Information disclosure in n/a (medium 5.0)
- [CVE-2008-1525](https://insights.sbomify.com/CVE-2008-1525/): Misconfiguration in n/a (medium 5.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2008-1527 and fix it if it is affected.

What it is: CVE-2008-1527 is a high-severity authentication bypass vulnerability in n/a, published on 26 Mar 2008. 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-2008-1527 in the wild and no public exploit code.

Affected product: n/a. 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-2008-1527/ (Markdown: https://insights.sbomify.com/CVE-2008-1527/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2008-1527
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2008-1527
- OSV: https://osv.dev/vulnerability/CVE-2008-1527

---
From sbomify Insights: https://insights.sbomify.com/CVE-2008-1527/
Summaries are generated and may contain mistakes; the official description above is the record.