How severe is CVE-2009-1168?

CVE-2009-1168 has a CVSS 2.0 base score of 7.1, rated high severity.

Is CVE-2009-1168 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-1168?

CVE-2009-1168 primarily affects Cisco Ios. In total, 15 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-1168?

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-2009-1168 published?

CVE-2009-1168 was published on 2009-07-30 and last updated on 2026-06-16.

CVE-2009-1168

CVE-2009-1168 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-399.

Key facts

Severity: High (CVSS 2.0 base score 7.1)
EPSS exploit prediction: 2% (82nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Cisco Ios
Published: 2009-07-30
Last modified: 2026-06-16

Description

Cisco IOS 12.0(32)S12 through 12.0(32)S13 and 12.0(33)S3 through 12.0(33)S4, 12.0(32)SY8 through 12.0(32)SY9, 12.2(33)SXI1, 12.2XNC before 12.2(33)XNC2, 12.2XND before 12.2(33)XND1, and 12.4(24)T1; and IOS XE 2.3 through 2.3.1t and 2.4 through 2.4.0; when RFC4893 BGP routing is enabled, allows remote attackers to cause a denial of service (memory corruption and device reload) by using an RFC4271 peer to send an update with a long series of AS numbers, aka Bug ID CSCsy86021.

Frequently asked questions

What is CVE-2009-1168?: Cisco IOS 12.0(32)S12 through 12.0(32)S13 and 12.0(33)S3 through 12.0(33)S4, 12.0(32)SY8 through 12.0(32)SY9, 12.2(33)SXI1, 12.2XNC before 12.2(33)XNC2, 12.2XND before 12.2(33)XND1, and 12.4(24)T1; and IOS XE 2.3 through 2.3.1t and 2.4 through 2.4.0; when RFC4893 BGP routing is enabled, allows remote attackers to cause a denial of service (memory corruption and device reload) by using an RFC4271 peer to send an update with a long series of AS numbers, aka Bug ID CSCsy86021.
How severe is CVE-2009-1168?: CVE-2009-1168 has a CVSS 2.0 base score of 7.1, rated high severity.
Is CVE-2009-1168 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-1168?: CVE-2009-1168 primarily affects Cisco Ios. In total, 15 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-1168?: 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-2009-1168 published?: CVE-2009-1168 was published on 2009-07-30 and last updated on 2026-06-16.

References

Affected products (15)

cpe:2.3:o:cisco:ios:12.0\(32\)s12:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.0\(32\)s13:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.0\(32\)sy8:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.0\(32\)sy9:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.0\(33\)s3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.0\(33\)s4:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2\(33\)sxi1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2\(33\)sxi2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2xnc:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2xnd:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.4\(24\)t1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:2.3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:2.3.1t:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:2.4:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:2.4.0:*:*:*:*:*:*:*

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