How severe is CVE-2013-5469?

CVE-2013-5469 has a CVSS 2.0 base score of 7.1, rated high severity.

Is CVE-2013-5469 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-2013-5469?

CVE-2013-5469 affects Cisco Ios. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2013-5469?

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-2013-5469 published?

CVE-2013-5469 was published on 2013-08-30 and last updated on 2026-06-16.

CVE-2013-5469

CVE-2013-5469 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-119.

Key facts

Severity: High (CVSS 2.0 base score 7.1)
EPSS exploit prediction: 2% (82nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Cisco Ios
Published: 2013-08-30
Last modified: 2026-06-16

Description

The TCP implementation in Cisco IOS does not properly implement the transitions from the ESTABLISHED state to the CLOSED state, which allows remote attackers to cause a denial of service (flood of ACK packets) via a crafted series of ACK and FIN packets, aka Bug ID CSCtz14399.

Frequently asked questions

What is CVE-2013-5469?: The TCP implementation in Cisco IOS does not properly implement the transitions from the ESTABLISHED state to the CLOSED state, which allows remote attackers to cause a denial of service (flood of ACK packets) via a crafted series of ACK and FIN packets, aka Bug ID CSCtz14399.
How severe is CVE-2013-5469?: CVE-2013-5469 has a CVSS 2.0 base score of 7.1, rated high severity.
Is CVE-2013-5469 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-2013-5469?: CVE-2013-5469 affects Cisco Ios. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2013-5469?: 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-2013-5469 published?: CVE-2013-5469 was published on 2013-08-30 and last updated on 2026-06-16.

References

Affected products (1)

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

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