How severe is CVE-2015-0638?

CVE-2015-0638 has a CVSS 2.0 base score of 7.1, rated high severity.

Is CVE-2015-0638 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-0638?

CVE-2015-0638 primarily affects Cisco Ios. In total, 31 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-0638?

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-2015-0638 published?

CVE-2015-0638 was published on 2015-03-26 and last updated on 2026-06-17.

CVE-2015-0638

CVE-2015-0638 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-20.

Key facts

Severity: High (CVSS 2.0 base score 7.1)
EPSS exploit prediction: 2% (74th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Cisco Ios
Published: 2015-03-26
Last modified: 2026-06-17

Description

Cisco IOS 12.2, 12.4, 15.0, 15.2, and 15.3, when a VRF interface is configured, allows remote attackers to cause a denial of service (interface queue wedge) via crafted ICMPv4 packets, aka Bug ID CSCsi02145.

Frequently asked questions

What is CVE-2015-0638?: Cisco IOS 12.2, 12.4, 15.0, 15.2, and 15.3, when a VRF interface is configured, allows remote attackers to cause a denial of service (interface queue wedge) via crafted ICMPv4 packets, aka Bug ID CSCsi02145.
How severe is CVE-2015-0638?: CVE-2015-0638 has a CVSS 2.0 base score of 7.1, rated high severity.
Is CVE-2015-0638 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-0638?: CVE-2015-0638 primarily affects Cisco Ios. In total, 31 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2015-0638?: 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-2015-0638 published?: CVE-2015-0638 was published on 2015-03-26 and last updated on 2026-06-17.

References

Affected products (31)

cpe:2.3:o:cisco:ios:12.2\(33\)ird1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2\(33\)ire3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2\(33\)sxi4b:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2\(44\)sq1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.4\(25e\)jam1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.4\(25e\)jap1m:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.4\(25e\)jaz1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.0\(2\)ed1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(1\)ex:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(2\)gc:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(2\)ja:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(2\)ja1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(2\)jax:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(2\)jax1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(2\)jb:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(2\)jb1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(2\)jb2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(2\)jb3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(2\)jb4:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(2\)jn1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(2\)jn2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(2\)t:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(2\)t1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(2\)t2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(2\)t3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(2\)t4:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(3\)t:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.3\(2\)s2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.3\(3\)ja1n:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.3\(3\)jab1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.3\(3\)jn:*:*:*:*:*:*:*

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