How severe is CVE-2012-4617?

CVE-2012-4617 has a CVSS 2.0 base score of 7.1, rated high severity.

Is CVE-2012-4617 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2012-4617?

CVE-2012-4617 primarily affects Cisco Ios. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2012-4617?

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-2012-4617 published?

CVE-2012-4617 was published on 2012-09-27 and last updated on 2026-06-16.

CVE-2012-4617

CVE-2012-4617 is a high-severity vulnerability in Cisco Ios with a CVSS 2.0 base score of 7.1. 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: High (CVSS 2.0 base score 7.1)
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Cisco Ios
Published: 2012-09-27
Last modified: 2026-06-16

Description

The BGP implementation in Cisco IOS 15.2, IOS XE 3.5.xS before 3.5.2S, and IOS XR 4.1.0 through 4.2.2 allows remote attackers to cause a denial of service (multiple connection resets) by leveraging a peer relationship and sending a malformed attribute, aka Bug IDs CSCtt35379, CSCty58300, CSCtz63248, and CSCtz62914.

Frequently asked questions

What is CVE-2012-4617?: The BGP implementation in Cisco IOS 15.2, IOS XE 3.5.xS before 3.5.2S, and IOS XR 4.1.0 through 4.2.2 allows remote attackers to cause a denial of service (multiple connection resets) by leveraging a peer relationship and sending a malformed attribute, aka Bug IDs CSCtt35379, CSCty58300, CSCtz63248, and CSCtz62914.
How severe is CVE-2012-4617?: CVE-2012-4617 has a CVSS 2.0 base score of 7.1, rated high severity.
Is CVE-2012-4617 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2012-4617?: CVE-2012-4617 primarily affects Cisco Ios. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2012-4617?: 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-2012-4617 published?: CVE-2012-4617 was published on 2012-09-27 and last updated on 2026-06-16.

References

Affected products (9)

cpe:2.3:o:cisco:ios:15.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.5.0s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.5.1s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:4.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:4.1.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:4.1.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:4.2.0:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:4.2.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:4.2.2:*:*:*:*:*:*:*

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