How severe is CVE-2012-4098?

CVE-2012-4098 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2012-4098 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2012-4098?

CVE-2012-4098 affects Cisco Nx-os. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2012-4098?

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

When was CVE-2012-4098 published?

CVE-2012-4098 was published on 2013-10-05 and last updated on 2026-06-16.

CVE-2012-4098

CVE-2012-4098 is a medium-severity vulnerability in Cisco Nx-os 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-20.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 2% (82nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Cisco Nx-os
Published: 2013-10-05
Last modified: 2026-06-16

Description

The BGP implementation in Cisco NX-OS does not properly filter AS paths, which allows remote attackers to cause a denial of service (BGP service reset and resync) via a malformed UPDATE message, aka Bug ID CSCtn13055.

Frequently asked questions

What is CVE-2012-4098?: The BGP implementation in Cisco NX-OS does not properly filter AS paths, which allows remote attackers to cause a denial of service (BGP service reset and resync) via a malformed UPDATE message, aka Bug ID CSCtn13055.
How severe is CVE-2012-4098?: CVE-2012-4098 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2012-4098 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2012-4098?: CVE-2012-4098 affects Cisco Nx-os. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2012-4098?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2012-4098 published?: CVE-2012-4098 was published on 2013-10-05 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:o:cisco:nx-os:-:*:*:*:*:*:*:*

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