Is CVE-2009-5038 in the CISA KEV catalog?

No. CVE-2009-5038 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2009-5038?

CVE-2009-5038 has a CVSS v2 base score of 7.8 (HIGH).

What is the EPSS score for CVE-2009-5038?

CVE-2009-5038 has an EPSS score of 3.18% (87th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2009-5038?

Upgrade ios to 15.0(1)xa or later.

CVE & CISA-KEV Catalog

CVE-2009-5038

HIGHEPSS 87th pctl

7.8

CVSS v2

NVD

Description

Cisco IOS before 15.0(1)XA does not properly handle IRC traffic during a specific time period after an initial reload, which allows remote attackers to cause a denial of service (device reload) via an attempted connection to a certain IRC server, related to a "corrupted magic value," aka Bug ID CSCso05336.

CWE-20Improper Input Validation

How to fix

Remediation Available

iosNVD

Affected:< 15.0(1)xaFixed in:15.0(1)xaCVE-2009-5038derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

3.18%probability of exploitation in 30 days

87thpercentile

Elevated risk: more likely to be exploited than 87% of all known CVEs.

References

Vendor Advisory1

cisco.com

Third-Party Advisory2

Related Vulnerabilities

Other CWE-20 (Improper Input Validation) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-3400	Critical	10.0	100%	KEV + Ransom	-
CVE-2021-45105	Medium	5.9	100%	-	Fix
CVE-2021-44228	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2021-21985	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2018-7600	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2020-3452	High	7.5	100%	KEV	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-29.