CVE-2009-2868

CVE-2009-2868 is a high-severity vulnerability in Cisco Ios with a CVSS 2.0 base score of 7.8. 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 7.8)
• EPSS exploit prediction: 2% (75th percentile)
• Actively exploited: Not listed in CISA KEV
• Affected product: Cisco Ios
• Published: 2009-09-28
• Last modified: 2026-06-16

Description

Unspecified vulnerability in Cisco IOS 12.2 through 12.4, when certificate-based authentication is enabled for IKE, allows remote attackers to cause a denial of service (Phase 1 SA exhaustion) via crafted requests, aka Bug IDs CSCsy07555 and CSCee72997.

Frequently asked questions

What is CVE-2009-2868?

Unspecified vulnerability in Cisco IOS 12.2 through 12.4, when certificate-based authentication is enabled for IKE, allows remote attackers to cause a denial of service (Phase 1 SA exhaustion) via crafted requests, aka Bug IDs CSCsy07555 and CSCee72997.

How severe is CVE-2009-2868?

CVE-2009-2868 has a CVSS 2.0 base score of 7.8, rated high severity.

Is CVE-2009-2868 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-2868?

CVE-2009-2868 primarily affects Cisco Ios. In total, 40 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-2868?

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-2009-2868 published?

CVE-2009-2868 was published on 2009-09-28 and last updated on 2026-06-16.

References

• http://tools.cisco.com/security/center/viewAlert.x?alertId=18887
• http://www.cisco.com/en/US/products/products_security_advisory09186a0080af8117.shtml
• http://www.vupen.com/english/advisories/2009/2759

Affected products (40)

• cpe:2.3:o:cisco:ios:12.2ex:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2ira:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2irb:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2irc:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2sb:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2sca:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2scb:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2se:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2sra:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2srb:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2src:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2srd:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2sxh:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2sxi:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2xna:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2xnb:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2xnc:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2xnd:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.3t:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.3xl:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.3xr:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.3xs:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.3xx:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.3ya:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.3yd:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.3yf:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.3yg:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.3yh:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.3yi:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.3yq:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.3ys:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.3yt:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.3yu:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.3yx:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.3yz:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.4:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.4t:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.4xb:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.4xc:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.4xd:*:*:*:*:*:*:*

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