CVE-2008-1618

5.0 MEDIUM 2% exploit odds Fix listed

What it is

The PPTP VPN service in Watchguard Firebox before 10, when performing the MS-CHAPv2 authentication handshake, generates different error codes depending on whether the username is valid or invalid, which allows remote attackers to enumerate valid usernames.

At a glance

Exploitability: Can be exploited over the network without logging in. Limited direct impact.
Exploit odds: 1.7% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2008-04-07 18:44 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-16 22:52 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 1.7% in the next 30 days (EPSS).
Severity: 5.0 MEDIUM (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2008-04-07 18:44 UTC
Last modified: 2026-06-16 22:52 UTC
Exploit probability: 1.7% · EPSS, next 30 days
Weakness: CWE-200 · Information exposure
Record status: Modified

Affected

Watchguard Firebox Pptp Vpn 4.9
Watchguard Firebox Pptp Vpn 5.0

Attack profile CVSS 2.0 · 5.0

Attack vector: Network
Complexity: Low
Authentication: None
Confidentiality: Partial
Integrity: None
Availability: None

Raw vector

AV:N/AC:L/Au:N/C:P/I:N/A:N

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2008-1618.md and follow it. Check whether this project is affected by CVE-2008-1618. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record