How severe is CVE-2015-6263?

CVE-2015-6263 has a CVSS 2.0 base score of 6.3, rated medium severity.

Is CVE-2015-6263 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-6263?

CVE-2015-6263 affects Cisco Ios. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-6263?

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

When was CVE-2015-6263 published?

CVE-2015-6263 was published on 2015-10-12 and last updated on 2026-06-17.

CVE-2015-6263

CVE-2015-6263 is a medium-severity vulnerability in Cisco Ios with a CVSS 2.0 base score of 6.3. 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-399.

Key facts

Severity: Medium (CVSS 2.0 base score 6.3)
EPSS exploit prediction: 1% (60th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Cisco Ios
Published: 2015-10-12
Last modified: 2026-06-17

Description

The RADIUS client implementation in Cisco IOS 15.4(3)M2.2, when a shared RADIUS secret is configured, allows remote RADIUS servers to cause a denial of service (device reload) via malformed answers, aka Bug ID CSCuu59324.

Frequently asked questions

What is CVE-2015-6263?: The RADIUS client implementation in Cisco IOS 15.4(3)M2.2, when a shared RADIUS secret is configured, allows remote RADIUS servers to cause a denial of service (device reload) via malformed answers, aka Bug ID CSCuu59324.
How severe is CVE-2015-6263?: CVE-2015-6263 has a CVSS 2.0 base score of 6.3, rated medium severity.
Is CVE-2015-6263 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-6263?: CVE-2015-6263 affects Cisco Ios. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-6263?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2015-6263 published?: CVE-2015-6263 was published on 2015-10-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:cisco:ios:15.4\(3\)m2.2:*:*:*:*:*:*:*

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