How severe is CVE-2009-2049?

CVE-2009-2049 has a CVSS 2.0 base score of 5.4, rated medium severity.

Is CVE-2009-2049 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-2009-2049?

CVE-2009-2049 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-2009-2049?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2009-2049 published?

CVE-2009-2049 was published on 2009-07-30 and last updated on 2026-06-16.

CVE-2009-2049

CVE-2009-2049 is a medium-severity vulnerability in Cisco Ios with a CVSS 2.0 base score of 5.4. 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-16.

Key facts

Severity: Medium (CVSS 2.0 base score 5.4)
EPSS exploit prediction: 2% (82nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-16
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 through 12.2(33)SXI2, 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 (device reload) by using an RFC4271 peer to send a malformed update, aka Bug ID CSCta33973.

Frequently asked questions

What is CVE-2009-2049?: 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 through 12.2(33)SXI2, 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 (device reload) by using an RFC4271 peer to send a malformed update, aka Bug ID CSCta33973.
How severe is CVE-2009-2049?: CVE-2009-2049 has a CVSS 2.0 base score of 5.4, rated medium severity.
Is CVE-2009-2049 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-2009-2049?: CVE-2009-2049 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-2009-2049?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-2049 published?: CVE-2009-2049 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:*:*:*:*:*:*:*

More vulnerabilities in Cisco Ios

CVE-2011-3271 — Critical (CVSS 10.0): Unspecified vulnerability in the Smart Install functionality in Cisco IOS 12.2 and 15.1 allows remote attackers to…
CVE-2011-0935 — Critical (CVSS 10.0): The PKI functionality in Cisco IOS 15.0 and 15.1 does not prevent permanent caching of certain public keys, which…
CVE-2010-1574 — Critical (CVSS 10.0): IOS 12.2(52)SE and 12.2(52)SE1 on Cisco Industrial Ethernet (IE) 3000 series switches has (1) a community name of…
CVE-2010-0581 — Critical (CVSS 10.0): Unspecified vulnerability in the SIP implementation in Cisco IOS 12.3 and 12.4 allows remote attackers to execute…
CVE-2010-0580 — Critical (CVSS 10.0): Unspecified vulnerability in the SIP implementation in Cisco IOS 12.3 and 12.4 allows remote attackers to execute…
CVE-2006-4950 — Critical (CVSS 10.0): Cisco IOS 12.2 through 12.4 before 20060920, as used by Cisco IAD2430, IAD2431, and IAD2432 Integrated Access Devices,…

All CVEs affecting Cisco Ios →

Other CWE-16 vulnerabilities

CVE-2013-4316 — Critical (CVSS 10.0): Apache Struts 2.0.0 through 2.3.15.1 enables Dynamic Method Invocation by default, which has unknown impact and attack…
CVE-2013-1221 — Critical (CVSS 10.0): The Tomcat Web Management feature in Cisco Unified Customer Voice Portal (CVP) Software before 9.0.1 ES 11 does not…
CVE-2011-4501 — Critical (CVSS 10.0): The UPnP IGD implementation in Edimax EdiLinux on the Edimax BR-6104K with firmware before 3.25, Edimax 6114Wg,…
CVE-2010-4586 — Critical (CVSS 10.0): The default configuration of Opera before 11.00 enables WebSockets functionality, which has unspecified impact and…
CVE-2010-2977 — Critical (CVSS 10.0): Cisco Unified Wireless Network (UWN) Solution 7.x before 7.0.98.0 does not properly implement TLS and SSL, which has…
CVE-2010-2276 — Critical (CVSS 10.0): The default configuration of the build process in Dojo 0.4.x before 0.4.4, 1.0.x before 1.0.3, 1.1.x before 1.1.2,…

Browse all CWE-16 vulnerabilities →