← Vulnerability feed

Vulnerability record · CVE-2011-2581 · published 14 September 2011

CVE-2011-2581: Cisco nx-os permissions and access controls vulnerability

Cisco · Nx Os

The ACL implementation in Cisco NX-OS 5.0(2) and 5.0(3) before 5.0(3)N2(1) on Nexus 5000 series switches, and NX-OS before 5.0(3)U1(2a) on Nexus 3000 series switches, does not properly handle comments in conjunction with deny statements, which allows remote attackers to bypass intended access restrictions in opportunistic circumstances by sending packets, aka Bug IDs CSCto09813 and CSCtr61490.

5.0 CVSS 2.0 Medium EPSS 2.0% · top 20.0% CWE-264 · Permissions and access controls
5.0CVSS 2.0 base score
2.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
6References
16 Jun 2026Last modified by NVD

Description

The ACL implementation in Cisco NX-OS 5.0(2) and 5.0(3) before 5.0(3)N2(1) on Nexus 5000 series switches, and NX-OS before 5.0(3)U1(2a) on Nexus 3000 series switches, does not properly handle comments in conjunction with deny statements, which allows remote attackers to bypass intended access restrictions in opportunistic circumstances by sending packets, aka Bug IDs CSCto09813 and CSCtr61490.

AV:N/AC:L/Au:N/C:P/I:N/A:N

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://secunia.com/advisories/45883
http://www.cisco.com/en/US/products/products_security_advisory09186a0080b9250c.shtml Vendor Advisory
http://www.securitytracker.com/id?1026019
http://secunia.com/advisories/45883
http://www.cisco.com/en/US/products/products_security_advisory09186a0080b9250c.shtml Vendor Advisory
http://www.securitytracker.com/id?1026019

Track CVE-2011-2581 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

6.7CVE-2024-20399Cisco NX-OS CLI command injection allows root command executionCisco NX-OS fails to properly validate arguments passed to specific configuration CLI commands, allowing OS command injection. An attacker who alread…KEVEPSS 4.3%analysed9.8CVE-2018-0310Cisco nx-os out-of-bounds read vulnerabilityA vulnerability in the Cisco Fabric Services component of Cisco FXOS Software and Cisco NX-OS Software could allow an unauthenticated, remote attacke…EPSS 4.1%9.8CVE-2018-0301Cisco nx-os improper input validation vulnerabilityA vulnerability in the NX-API feature of Cisco NX-OS Software could allow an unauthenticated, remote attacker to craft a packet to the management int…EPSS 17%9.8CVE-2016-1453Cisco nx-os memory buffer overflow vulnerabilityBuffer overflow in the Overlay Transport Virtualization (OTV) GRE feature in Cisco NX-OS 5.0 through 7.3 on Nexus 7000 and 7700 devices allows remote…EPSS 8.1%9.8CVE-2016-1341Cisco nx-os permissions and access controls vulnerabilityCisco 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, which allows local users to ga…EPSS 1.1%9.3CVE-2013-1192Cisco adaptive security appliance device manager improper input validation vulnerabilityThe JAR files on Cisco Device Manager for Cisco MDS 9000 devices before 5.2.8, and Cisco Device Manager for Cisco Nexus 5000 devices, allow remote at…EPSS 2.4%9.1CVE-2021-1361Cisco nx-os vulnerabilityA vulnerability in the implementation of an internal file management service for Cisco Nexus 3000 Series Switches and Cisco Nexus 9000 Series Switche…EPSS 1.6%9.0CVE-2015-4235Cisco application policy infrastructure controller \(apic\) permissions and access controls vulnerabilityCisco Application Policy Infrastructure Controller (APIC) devices with software before 1.0(3o) and 1.1 before 1.1(1j) and Nexus 9000 ACI devices with…EPSS 2.2%

Source: NIST National Vulnerability Database (record CVE-2011-2581), CISA KEV, FIRST EPSS (scores of 2026-10-06). This page is refreshed as NVD updates the record.