How severe is CVE-2011-3280?

CVE-2011-3280 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2011-3280 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-3280?

CVE-2011-3280 primarily affects Cisco Ios Xe. In total, 189 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-3280?

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-2011-3280 published?

CVE-2011-3280 was published on 2011-10-03 and last updated on 2026-06-16.

CVE-2011-3280

CVE-2011-3280 is a high-severity vulnerability in Cisco Ios Xe with a CVSS 3.x base score of 7.5. 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 3.x base score 7.5)
CVSS v2: 7.8
EPSS exploit prediction: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Cisco Ios Xe
Published: 2011-10-03
Last modified: 2026-06-16

Description

Memory leak in the NAT implementation in Cisco IOS 12.1 through 12.4 and 15.0 through 15.1, and IOS XE 3.1.xSG, allows remote attackers to cause a denial of service (memory consumption or device reload) by sending crafted SIP packets to UDP port 5060, aka Bug ID CSCtj04672.

Frequently asked questions

What is CVE-2011-3280?: Memory leak in the NAT implementation in Cisco IOS 12.1 through 12.4 and 15.0 through 15.1, and IOS XE 3.1.xSG, allows remote attackers to cause a denial of service (memory consumption or device reload) by sending crafted SIP packets to UDP port 5060, aka Bug ID CSCtj04672.
How severe is CVE-2011-3280?: CVE-2011-3280 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2011-3280 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-3280?: CVE-2011-3280 primarily affects Cisco Ios Xe. In total, 189 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-3280?: 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-2011-3280 published?: CVE-2011-3280 was published on 2011-10-03 and last updated on 2026-06-16.

References

Affected products (189)

cpe:2.3:o:cisco:ios_xe:3.1.0sg:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.1.1sg:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.1e:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2b:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2bc:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2bx:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2cx:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2cz:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2ew:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2ewa:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2ex:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2ey:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2ez:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2fx:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2fy:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2fz:*:*:*:*:*:*:*
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:12.2irf:*:*:*:*:*:*:*
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:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2ixf:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2ixg:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2ixh:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2mc:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2mra:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2mrb:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2sb:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2sbc:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2sca:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.2scb:*:*:*:*:*:*:*

More vulnerabilities in Cisco Ios Xe

CVE-2025-20188 — Critical (CVSS 10.0): A vulnerability in the Out-of-Band Access Point (AP) Image Download, the Clean Air Spectral Recording, and the client…
CVE-2023-20198 — Critical (CVSS 10.0): Cisco is providing an update for the ongoing investigation into observed exploitation of the web UI feature in Cisco…
CVE-2021-34770 — Critical (CVSS 10.0): A vulnerability in the Control and Provisioning of Wireless Access Points (CAPWAP) protocol processing of Cisco IOS XE…
CVE-2019-12643 — Critical (CVSS 10.0): A vulnerability in the Cisco REST API virtual service container for Cisco IOS XE Software could allow an…
CVE-2021-1619 — Critical (CVSS 9.8): A vulnerability in the authentication, authorization, and accounting (AAA) function of Cisco IOS XE Software could…
CVE-2020-3227 — Critical (CVSS 9.8): A vulnerability in the authorization controls for the Cisco IOx application hosting infrastructure in Cisco IOS XE…

All CVEs affecting Cisco Ios Xe →

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 →