CVE-2008-3806
CVE-2008-3806 is a high-severity vulnerability in Cisco Ios with a CVSS 2.0 base score of 8.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.
Key facts
- Severity: High (CVSS 2.0 base score 8.5)
- EPSS exploit prediction: 3% (86th percentile)
- Actively exploited: Not listed in CISA KEV
- Affected product: Cisco Ios
- Published:
- Last modified:
Description
Cisco IOS 12.0 through 12.4 on Cisco 10000, uBR10012 and uBR7200 series devices handles external UDP packets that are sent to 127.0.0.0/8 addresses intended for IPC communication within the device, which allows remote attackers to cause a denial of service (device or linecard reload) via crafted UDP packets, a different vulnerability than CVE-2008-3805.
Frequently asked questions
- What is CVE-2008-3806?
- Cisco IOS 12.0 through 12.4 on Cisco 10000, uBR10012 and uBR7200 series devices handles external UDP packets that are sent to 127.0.0.0/8 addresses intended for IPC communication within the device, which allows remote attackers to cause a denial of service (device or linecard reload) via crafted UDP packets, a different vulnerability than CVE-2008-3805.
- How severe is CVE-2008-3806?
- CVE-2008-3806 has a CVSS 2.0 base score of 8.5, rated high severity.
- Is CVE-2008-3806 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2008-3806?
- CVE-2008-3806 primarily affects Cisco Ios. In total, 11 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2008-3806?
- 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-2008-3806 published?
- CVE-2008-3806 was published on 2008-09-26 and last updated on 2026-06-16.
References
- http://secunia.com/advisories/31990
- http://tools.cisco.com/security/center/viewAlert.x?alertId=16646
- http://www.cisco.com/en/US/products/products_security_advisory09186a0080a014ae.shtml
- https://exchange.xforce.ibmcloud.com/vulnerabilities/45592
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7123
Affected products (11)
- cpe:2.3:o:cisco:ios:12.0s:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ios:12.0sl:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ios:12.0st:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ios:12.2sb:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ios:12.2sca:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ios:12.2src:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ios:12.2zx:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ios:12.3bc:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ios:12.3t:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ios:12.3xi:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ios:12.4:*:*:*:*:*:*:*
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