How severe is CVE-2012-1366?

CVE-2012-1366 has a CVSS 2.0 base score of 6.1, rated medium severity.

Is CVE-2012-1366 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2012-1366?

CVE-2012-1366 primarily affects Cisco Ios. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2012-1366?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2012-1366 published?

CVE-2012-1366 was published on 2014-04-23 and last updated on 2026-06-16.

CVE-2012-1366

CVE-2012-1366 is a medium-severity vulnerability in Cisco Ios with a CVSS 2.0 base score of 6.1. 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-20.

Key facts

Severity: Medium (CVSS 2.0 base score 6.1)
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Cisco Ios
Published: 2014-04-23
Last modified: 2026-06-16

Description

Cisco IOS before 15.1(1)SY on ASR 1000 devices, when Multicast Listener Discovery (MLD) tracking is enabled for IPv6, allows remote attackers to cause a denial of service (device reload) via crafted MLD packets, aka Bug ID CSCtz28544.

Frequently asked questions

What is CVE-2012-1366?: Cisco IOS before 15.1(1)SY on ASR 1000 devices, when Multicast Listener Discovery (MLD) tracking is enabled for IPv6, allows remote attackers to cause a denial of service (device reload) via crafted MLD packets, aka Bug ID CSCtz28544.
How severe is CVE-2012-1366?: CVE-2012-1366 has a CVSS 2.0 base score of 6.1, rated medium severity.
Is CVE-2012-1366 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2012-1366?: CVE-2012-1366 primarily affects Cisco Ios. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2012-1366?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2012-1366 published?: CVE-2012-1366 was published on 2014-04-23 and last updated on 2026-06-16.

References

http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/15-1SY/release_notes.pdf

Affected products (10)

cpe:2.3:o:cisco:ios:15.1:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_1001:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_1002:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_1002-x:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_1002_fixed_router:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_1004:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_1006:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_1013:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_1023_router:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_9000_rsp440_router:-:*:*:*:*:*:*:*

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