How severe is CVE-2011-2059?

CVE-2011-2059 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2011-2059 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-2059?

CVE-2011-2059 affects Cisco Ios. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2011-2059?

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

When was CVE-2011-2059 published?

CVE-2011-2059 was published on 2011-10-22 and last updated on 2026-06-16.

CVE-2011-2059

CVE-2011-2059 is a medium-severity vulnerability in Cisco Ios with a CVSS 2.0 base score of 5.0. 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-200.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 2% (72nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Cisco Ios
Published: 2011-10-22
Last modified: 2026-06-16

Description

The ipv6 component in Cisco IOS before 15.1(4)M1.3 allows remote attackers to conduct fingerprinting attacks and obtain potentially sensitive information about the presence of the IOS operating system via an ICMPv6 Echo Request packet containing a Hop-by-Hop (HBH) extension header (EH) with a 0x0c01050c value in the PadN option data, aka Bug ID CSCtq02219.

Frequently asked questions

What is CVE-2011-2059?: The ipv6 component in Cisco IOS before 15.1(4)M1.3 allows remote attackers to conduct fingerprinting attacks and obtain potentially sensitive information about the presence of the IOS operating system via an ICMPv6 Echo Request packet containing a Hop-by-Hop (HBH) extension header (EH) with a 0x0c01050c value in the PadN option data, aka Bug ID CSCtq02219.
How severe is CVE-2011-2059?: CVE-2011-2059 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2011-2059 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-2059?: CVE-2011-2059 affects Cisco Ios. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2011-2059?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-2059 published?: CVE-2011-2059 was published on 2011-10-22 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*

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