CVE-2002-1623

Vpn 1 Firewall 1 vulnerability

CVSS

5.0

EPSS

48.6%

EPSS pct

99th

Exploited

No known

The design of the Internet Key Exchange (IKE) protocol, when using Aggressive Mode for shared secret authentication, does not encrypt initiator or responder identities during negotiation, which may allow remote attackers to determine valid usernames by (1) monitoring responses before the password is supplied or (2) sniffing, as originally reported for FireWall-1 SecuRemote.

Affected vendor

Checkpoint

Affected product

Vpn 1 Firewall 1

CVSS vector

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

Published

2002-12-31

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no authentication. Successful exploitation leads to partial impact to confidentiality.

Its EPSS score of 48.6% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it among the most exploited CVEs currently tracked.

Check your external exposure to CVE-2002-1623

Confirm whether Checkpoint Vpn 1 Firewall 1 is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2002-1623.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2002-1623

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2002-1623 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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