CVE-2005-1802
Nortel VPN Router (aka Contivity) allows remote attackers to cause a denial of service (crash)...
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.
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2005-1802- CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:N/A:P - Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2005-1802- Updated
- 2026-11-02
EUVDEUVD-2005-1804 No score
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.
- Record
EUVD-2005-1804- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-c5fw-9qc8-grvm No score
Nortel VPN Router (aka Contivity) allows remote attackers to cause a denial of service (crash)...
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.
- Record
GHSA-c5fw-9qc8-grvm- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2005-1802 is a medium vulnerability (CVSS 5.0) in Nortel Contivity, published May 27, 2005. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.59%, the 75th percentile. No source names a fixed version.