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CVE-2008-1618

15
FAUCET Score

CVE-2008-1618 describes a username enumeration vulnerability in the PPTP VPN service of Watchguard Firebox devices prior to version 10. This flaw allows remote attackers to determine valid usernames by observing distinct error codes during MS-CHAPv2 authentication attempts. With a CVSS score of 5.0, this vulnerability is of medium severity, requiring no authentication or complex attack vectors, and primarily impacts confidentiality by exposing user account information. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this decade-old vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
4.9CPE matchmatch criteria
cpe:2.3:a:watchguard:firebox_pptp_vpn:4.9:*:*:*:*:*:*:*
5.0CPE matchmatch criteria
cpe:2.3:a:watchguard:firebox_pptp_vpn:5.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

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

Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.74%
Probability of exploitation in next 30 days
EPSS Percentile
75.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0174 is in the 61st percentile among its peer group of 23,723 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

secunia.com / advisories/29708
Vendor Advisory
exchange.xforce.ibmcloud.com / vulnerabilities/41683
mwrinfosecurity.com / publications/mwri_watchguard-firebox-pptp-vpn-user-enumeration-advisory_2008-04-04.pdf
ExploitPatch
osvdb.org / 44218
securityfocus.com / bid/28619
securitytracker.com / id
vupen.com / english/advisories/2008/1152/references
Vendor Advisory