CVE-2012-0381

The IKEv1 implementation in Cisco IOS 12.2 through 12.4 and 15.0 through 15.2 and IOS XE 2.1.x...

7.5 High

The IKEv1 implementation in Cisco IOS 12.2 through 12.4 and 15.0 through 15.2 and IOS XE 2.1.x through 2.6.x and 3.1.xS through 3.4.xS before 3.4.2S, 3.5.xS before 3.5.1S, and 3.2.xSG before 3.2.2SG allows remote attackers to cause a denial of service (device reload) by sending IKE UDP packets over (1) IPv4 or (2) IPv6, aka Bug ID CSCts38429.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

3.81%Up 2.5 points since Feb 4, 2022

What each source reports

NVD Score used 7.5

Record: CVE-2012-0381
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0: 7.8 HighAV:N/AC:L/Au:N/C:N/I:N/A:C
Weakness: CWE-310
Updated: 2026-11-02

CVE List No score

Record: CVE-2012-0381
Updated: 2026-11-02

EUVDEUVD-2012-0417 No score

Record: EUVD-2012-0417
Updated: 2026-11-03

GitHub AdvisoriesGHSA-34wg-h45c-wrjc 7.5

The IKEv1 implementation in Cisco IOS 12.2 through 12.4 and 15.0 through 15.2 and IOS XE 2.1.x...

Record: GHSA-34wg-h45c-wrjc
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

Affected products

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2012-0381 is a high vulnerability (CVSS 7.5) in Cisco Ios, published March 29, 2012. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.81%, the 90th percentile. No source names a fixed version.