How severe is CVE-2011-0945?

CVE-2011-0945 has a CVSS 2.0 base score of 7.8, rated high severity.

Is CVE-2011-0945 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-2011-0945?

CVE-2011-0945 primarily affects Cisco Ios. In total, 195 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-0945?

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-2011-0945 published?

CVE-2011-0945 was published on 2011-10-03 and last updated on 2026-06-16.

CVE-2011-0945

CVE-2011-0945 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. The underlying weakness is classified as CWE-399.

Key facts

Severity: High (CVSS 2.0 base score 7.8)
EPSS exploit prediction: 2% (75th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Cisco Ios
Published: 2011-10-03
Last modified: 2026-06-16

Description

Memory leak in the Data-link switching (aka DLSw) feature in Cisco IOS 12.1 through 12.4 and 15.0 through 15.1, and IOS XE 3.1.xS before 3.1.3S and 3.2.xS before 3.2.1S, when implemented over Fast Sequence Transport (FST), allows remote attackers to cause a denial of service (memory consumption and device reload or hang) via a crafted IP protocol 91 packet, aka Bug ID CSCth69364.

Frequently asked questions

What is CVE-2011-0945?: Memory leak in the Data-link switching (aka DLSw) feature in Cisco IOS 12.1 through 12.4 and 15.0 through 15.1, and IOS XE 3.1.xS before 3.1.3S and 3.2.xS before 3.2.1S, when implemented over Fast Sequence Transport (FST), allows remote attackers to cause a denial of service (memory consumption and device reload or hang) via a crafted IP protocol 91 packet, aka Bug ID CSCth69364.
How severe is CVE-2011-0945?: CVE-2011-0945 has a CVSS 2.0 base score of 7.8, rated high severity.
Is CVE-2011-0945 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-2011-0945?: CVE-2011-0945 primarily affects Cisco Ios. In total, 195 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-0945?: 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-2011-0945 published?: CVE-2011-0945 was published on 2011-10-03 and last updated on 2026-06-16.

References

Affected products (195)

cpe:2.3:o:cisco:ios:12.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.1t:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.1xi:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.1xj:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.1xl:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.1xm:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.1xp:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.1xq:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.1xr:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.1xs:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.1xt:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.1xu:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.1xv:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.1xy:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.1ya:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.1yb:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.1yc:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.1yd:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.1ye:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.1yf:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.1yh:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.1yi:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2b:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2bw:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2bx:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2by:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2cz:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2dd:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2dx:*:*:*:*:*:*:*
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:12.2ird:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2ire:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2ixa:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2ixb:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2ixc:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2ixd:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2ixe:*:*:*:*:*:*:*

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-399 (Resource Management Errors) vulnerabilities

CVE-2015-8104 — Critical (CVSS 10.0): The KVM subsystem in the Linux kernel through 4.2.6, and Xen 4.3.x through 4.6.x, allows guest OS users to cause a…
CVE-2015-0339 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2015-0335 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2015-0333 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2014-4121 — Critical (CVSS 10.0): Microsoft .NET Framework 2.0 SP2, 3.5, 3.5.1, 4, 4.5, 4.5.1, and 4.5.2 does not properly parse internationalized…
CVE-2014-0560 — Critical (CVSS 10.0): Use-after-free vulnerability in Adobe Reader and Acrobat 10.x before 10.1.12 and 11.x before 11.0.09 on Windows and OS…

Browse all CWE-399 (Resource Management Errors) vulnerabilities →