The PPTP VPN service in Watchguard Firebox before 10, when performing the MS-CHAPv2…
Priority LOW 26CWE-200Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- Partial · None · None
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-200.
Summary
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.
Why it matters now
EPSS 0.01738 77th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:watchguard:firebox_pptp_vpn:4.9:*:*:*:*:*:*:* | 4.9 | Vulnerable | WatchGuard |
| cpe:2.3:a:watchguard:firebox_pptp_vpn:5.0:*:*:*:*:*:*:* | 5.0 | Vulnerable | WatchGuard |
- cpe:2.3:a:watchguard:firebox_pptp_vpn:4.9:*:*:*:*:*:*:* Versions 4.9 Vulnerable ·WatchGuard
- cpe:2.3:a:watchguard:firebox_pptp_vpn:5.0:*:*:*:*:*:*:* Versions 5.0 Vulnerable ·WatchGuard
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2008-1618
- 2026-10-03 Alias added: GHSA-pv8j-6vmm-x69g
References
Sources
- CVE-2008-1618 · CVE Program
- CVE-2008-1618 · NVD
- FIRST EPSS
- GHSA-pv8j-6vmm-x69g · GitHub Advisory Database · CC BY 4.0
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