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CVE-2000-0339

31
FAUCET Score

CVE-2000-0339 describes a critical firewall bypass vulnerability in ZoneAlarm 2.1.10 and earlier, where the software fails to filter UDP packets originating from source port 67. This oversight allows remote attackers to circumvent established firewall rules, potentially gaining unauthorized access to protected systems. With a CVSS score of 7.5 (HIGH), the vulnerability is easily exploitable over the network with no authentication, leading to potential compromise of confidentiality, integrity, and availability. While there is no evidence of active exploitation or Metasploit/Nuclei modules, an ExploitDB entry exists, and the vulnerability has received no community discussion or media coverage, indicating its age and likely inactivity.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.2.10CPE matchmatch criteria
cpe:2.3:a:zonelabs:zonealarm:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.5HIGH

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

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
7.26%
Probability of exploitation in next 30 days
EPSS Percentile
93.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
ExploitDB: EDB-19871 · Apr 24, 2000
This CVE's current EPSS score of 0.0726 is in the 89th percentile among its peer group of 51,466 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, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

osvdb.org / 1294
securityfocus.com / bid/1137
securityfocus.com / templates/archive.pike