How severe is CVE-2014-7997?

CVE-2014-7997 has a CVSS 2.0 base score of 6.1, rated medium severity.

Is CVE-2014-7997 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2014-7997?

CVE-2014-7997 affects Cisco Ios. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2014-7997?

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

When was CVE-2014-7997 published?

CVE-2014-7997 was published on 2014-11-15 and last updated on 2026-06-17.

CVE-2014-7997

CVE-2014-7997 is a medium-severity vulnerability in Cisco Ios with a CVSS 2.0 base score of 6.1. 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-399.

Key facts

Severity: Medium (CVSS 2.0 base score 6.1)
EPSS exploit prediction: 1% (48th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Cisco Ios
Published: 2014-11-15
Last modified: 2026-06-17

Description

The DHCP implementation in Cisco IOS on Aironet access points does not properly handle error conditions with short leases and unsuccessful lease-renewal attempts, which allows remote attackers to cause a denial of service (device restart) by triggering a transition into a recovery state that was intended to involve a network-interface restart but actually involves a full device restart, aka Bug ID CSCtn16281.

Frequently asked questions

What is CVE-2014-7997?: The DHCP implementation in Cisco IOS on Aironet access points does not properly handle error conditions with short leases and unsuccessful lease-renewal attempts, which allows remote attackers to cause a denial of service (device restart) by triggering a transition into a recovery state that was intended to involve a network-interface restart but actually involves a full device restart, aka Bug ID CSCtn16281.
How severe is CVE-2014-7997?: CVE-2014-7997 has a CVSS 2.0 base score of 6.1, rated medium severity.
Is CVE-2014-7997 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2014-7997?: CVE-2014-7997 affects Cisco Ios. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2014-7997?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2014-7997 published?: CVE-2014-7997 was published on 2014-11-15 and last updated on 2026-06-17.

References

Affected products (1)

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

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