How severe is CVE-2012-0381?

CVE-2012-0381 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2012-0381 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2012-0381?

CVE-2012-0381 primarily affects Cisco Ios. In total, 756 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2012-0381?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2012-0381 published?

CVE-2012-0381 was published on 2012-03-29 and last updated on 2026-06-16.

CVE-2012-0381

CVE-2012-0381 is a high-severity vulnerability in Cisco Ios with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-310.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 7.8
EPSS exploit prediction: 4% (89th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-310
Affected product: Cisco Ios
Published: 2012-03-29
Last modified: 2026-06-16

Description

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.

Frequently asked questions

What is 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 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.
How severe is CVE-2012-0381?: CVE-2012-0381 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2012-0381 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2012-0381?: CVE-2012-0381 primarily affects Cisco Ios. In total, 756 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2012-0381?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2012-0381 published?: CVE-2012-0381 was published on 2012-03-29 and last updated on 2026-06-16.

References

Affected products (756)

cpe:2.3:o:cisco:ios:12.0:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2\(1\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2\(1\)dx:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2\(1\)s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2\(1\)t:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2\(1\)xa:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2\(1\)xd:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2\(1\)xd1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2\(1\)xd3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2\(1\)xd4:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2\(1\)xe:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2\(1\)xe2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2\(1\)xe3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2\(1\)xh:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2\(1\)xq:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2\(1\)xs:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2\(1\)xs1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2\(1.1\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2\(1.1\)pi:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2\(1.4\)s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2\(1b\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2\(1b\)da1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2\(1d\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2\(2\)b:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2\(2\)bx:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2\(2\)by:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2\(2\)by2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2\(2\)dd3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2\(2\)t:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2\(2\)t1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2\(2\)t4:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2\(2\)xa:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2\(2\)xa1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2\(2\)xa5:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2\(2\)xb:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2\(2\)xb3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2\(2\)xb4:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2\(2\)xb11:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2\(2\)xb14:*:*:*:*:*:*:*

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