CVE-2013-5566
CVE-2013-5566 is a medium-severity vulnerability in Cisco Nx-os with a CVSS 2.0 base score of 5.0. 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-119.
Key facts
- Severity: Medium (CVSS 2.0 base score 5.0)
- EPSS exploit prediction: 2% (77th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-119
- Affected product: Cisco Nx-os
- Published:
- Last modified:
Description
Cisco NX-OS 5.0 and earlier on MDS 9000 devices allows remote attackers to cause a denial of service (supervisor CPU consumption) via Authentication Header (AH) authentication in a Virtual Router Redundancy Protocol (VRRP) frame, aka Bug ID CSCte27874.
Frequently asked questions
- What is CVE-2013-5566?
- Cisco NX-OS 5.0 and earlier on MDS 9000 devices allows remote attackers to cause a denial of service (supervisor CPU consumption) via Authentication Header (AH) authentication in a Virtual Router Redundancy Protocol (VRRP) frame, aka Bug ID CSCte27874.
- How severe is CVE-2013-5566?
- CVE-2013-5566 has a CVSS 2.0 base score of 5.0, rated medium severity.
- Is CVE-2013-5566 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2013-5566?
- CVE-2013-5566 primarily affects Cisco Nx-os. In total, 38 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2013-5566?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2013-5566 published?
- CVE-2013-5566 was published on 2013-11-08 and last updated on 2026-06-16.
References
- http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2013-5566
- http://tools.cisco.com/security/center/viewAlert.x?alertId=31663
Affected products (38)
- cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:4.0:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:4.0\(0\)n1\(1a\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:4.0\(0\)n1\(2\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:4.0\(0\)n1\(2a\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:4.0\(1a\)n1\(1\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:4.0\(1a\)n1\(1a\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:4.0\(1a\)n2\(1\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:4.0\(1a\)n2\(1a\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:4.0\(4\)sv1\(1\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:4.0\(4\)sv1\(2\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:4.0\(4\)sv1\(3\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:4.0\(4\)sv1\(3a\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:4.0\(4\)sv1\(3b\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:4.0\(4\)sv1\(3c\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:4.0\(4\)sv1\(3d\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:4.1\(3\)n1\(1\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:4.1\(3\)n1\(1a\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:4.1\(3\)n2\(1\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:4.1\(3\)n2\(1a\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:4.1.\(2\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:4.1.\(3\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:4.1.\(4\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:4.1.\(5\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:4.2:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:4.2\(1\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:4.2\(1\)n1\(1\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:4.2\(1\)n2\(1\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:4.2\(1\)n2\(1a\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:4.2\(1\)sv1\(4\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:4.2\(1\)sv1\(4a\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:4.2\(1\)sv1\(5.1\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:4.2\(2\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:4.2\(3\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:4.2\(4\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:4.2\(6\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:4.2\(8\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:nx-os:4.2.\(2a\):*:*:*:*:*:*:*
More vulnerabilities in Cisco Nx-os
- CVE-2021-1361 — Critical (CVSS 9.8): A vulnerability in the implementation of an internal file management service for Cisco Nexus 3000 Series Switches and…
- CVE-2018-0310 — Critical (CVSS 9.8): A vulnerability in the Cisco Fabric Services component of Cisco FXOS Software and Cisco NX-OS Software could allow an…
- CVE-2018-0301 — Critical (CVSS 9.8): A vulnerability in the NX-API feature of Cisco NX-OS Software could allow an unauthenticated, remote attacker to craft…
- CVE-2016-1453 — Critical (CVSS 9.8): Buffer overflow in the Overlay Transport Virtualization (OTV) GRE feature in Cisco NX-OS 5.0 through 7.3 on Nexus 7000…
- CVE-2016-1341 — Critical (CVSS 9.8): Cisco NX-OS 7.0(1)N1(1), 7.0(1)N1(3), and 7.0(4)N1(1) on Nexus 2000 Fabric Extender devices has a blank root password,…
- CVE-2015-4235 — Critical (CVSS 9.0): Cisco Application Policy Infrastructure Controller (APIC) devices with software before 1.0(3o) and 1.1 before 1.1(1j)…
All CVEs affecting Cisco Nx-os →
Other CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) vulnerabilities
- CVE-2026-2778 — Critical (CVSS 10.0): Sandbox escape due to incorrect boundary conditions in the DOM: Core & HTML component. This vulnerability was fixed in…
- CVE-2026-2776 — Critical (CVSS 10.0): Sandbox escape due to incorrect boundary conditions in the Telemetry component in External Software. This vulnerability…
- CVE-2025-1866 — Critical (CVSS 10.0): Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in warmcat libwebsockets allows…
- CVE-2022-27625 — Critical (CVSS 10.0): A vulnerability regarding improper restriction of operations within the bounds of a memory buffer is found in the…
- CVE-2022-27624 — Critical (CVSS 10.0): A vulnerability regarding improper restriction of operations within the bounds of a memory buffer is found in the…
- CVE-2020-11896 — Critical (CVSS 10.0): The Treck TCP/IP stack before 6.0.1.66 allows Remote Code Execution, related to IPv4 tunneling.