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CVE-2001-1431

15
FAUCET Score

CVE-2001-1431 describes a vulnerability in Nokia Firewall Appliances running specific IPSO and VPN-1/FireWall-1 versions, where the SYN Defender in Active Gateway mode fails to properly rewrite the third packet of a TCP handshake with the correct NAT IP. This flaw allows remote attackers to gain sensitive information. The vulnerability has a CVSS score of 5.0 (Medium), indicating a network-based attack with low complexity, requiring no authentication, and primarily impacting confidentiality. There is no impact on integrity or availability. Despite its age, there is no evidence of active exploitation, no known exploit code in Metasploit, Nuclei, or ExploitDB, and it has received no community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
4.1CPE matchmatch criteria
cpe:2.3:a:checkpoint:firewall-1:4.1:sp3:*:*:*:*:*:*
4.1CPE matchmatch criteria
cpe:2.3:a:checkpoint:firewall-1:4.1:sp4:*:*:*:*:*:*
4.1CPE matchmatch criteria
cpe:2.3:a:checkpoint:firewall-1:4.1:sp5:*:*:*:*:*:*
4.1CPE matchmatch criteria
cpe:2.3:a:checkpoint:vpn-1:4.1:sp3:*:*:*:*:*:*
4.1CPE matchmatch criteria
cpe:2.3:a:checkpoint:vpn-1:4.1:sp4:*:*:*:*:*:*

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
1.30%
Probability of exploitation in next 30 days
EPSS Percentile
67.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0130 is in the 47th percentile among its peer group of 23,725 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

exchange.xforce.ibmcloud.com / vulnerabilities/8293
kb.cert.org / vuls/id/258731
US Government Resource