How severe is CVE-2013-6694?

CVE-2013-6694 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2013-6694 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-6694?

CVE-2013-6694 affects Cisco Ios. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2013-6694?

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

When was CVE-2013-6694 published?

CVE-2013-6694 was published on 2013-11-22 and last updated on 2026-06-17.

CVE-2013-6694

CVE-2013-6694 is a medium-severity vulnerability in Cisco Ios with a CVSS 2.0 base score of 4.3. 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 4.3)
EPSS exploit prediction: 1% (61st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Cisco Ios
Published: 2013-11-22
Last modified: 2026-06-17

Description

The IPSec implementation in Cisco IOS allows remote attackers to cause a denial of service (MTU change and tunnel-session drop) via crafted ICMP packets, aka Bug ID CSCul29918.

Frequently asked questions

What is CVE-2013-6694?: The IPSec implementation in Cisco IOS allows remote attackers to cause a denial of service (MTU change and tunnel-session drop) via crafted ICMP packets, aka Bug ID CSCul29918.
How severe is CVE-2013-6694?: CVE-2013-6694 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2013-6694 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-6694?: CVE-2013-6694 affects Cisco Ios. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2013-6694?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2013-6694 published?: CVE-2013-6694 was published on 2013-11-22 and last updated on 2026-06-17.

References

http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2013-6694

Affected products (1)

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

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