CVE-2005-1802

Name: CVE-2005-1802
Creator: NVD / NIST
Published: 2005-05-27T04:00:00+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.59%

Last modified Jun 16, 2026

CVE-2005-1802 is a vulnerability of currently unknown severity. Nortel VPN Router (aka Contivity) allows remote attackers to cause a denial of service (crash) via an IPsec IKE packet with a malformed ISAKMP header.. EPSS estimates a 1.59% chance of exploitation in the next 30 days.

Description

Nortel VPN Router (aka Contivity) allows remote attackers to cause a denial of service (crash) via an IPsec IKE packet with a malformed ISAKMP header.

Metrics

EPSS Probability

1.59%

72.6th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Nortel	Contivity	1000_vpn_switch
Nortel	Contivity	1500_vpn_switch
Nortel	Contivity	1600_secure_ip_services_gateway
Nortel	Contivity	2000_vpn_switch
Nortel	Contivity	2500_vpn_switch
Nortel	Contivity	2600_secure_ip_services_gateway
Nortel	Contivity	4000_vpn_switch
Nortel	Contivity	4500_secure_ip_services_gateway
Nortel	Contivity	4600_secure_ip_services_gateway
Nortel	Vpn Router 1010	All versions
Nortel	Vpn Router 1050	All versions
Nortel	Vpn Router 1100	All versions
Nortel	Vpn Router 1700	All versions
Nortel	Vpn Router 1740	All versions
Nortel	Vpn Router 2700	All versions
Nortel	Vpn Router 5000	All versions
Nortel	Vpn Router 600	All versions

References

Timeline

Published: May 27, 2005
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2005-1802?

Nortel VPN Router (aka Contivity) allows remote attackers to cause a denial of service (crash) via an IPsec IKE packet with a malformed ISAKMP header.

How severe is CVE-2005-1802?

Severity scoring for CVE-2005-1802 is pending analysis. The EPSS model estimates a 1.59% probability of exploitation in the next 30 days.

How do I fix CVE-2005-1802?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2005-1802?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST