This page lists publicly disclosed CVE vulnerabilities affecting cisco catos (linked via NVD CPE). Each row includes severity scores, summaries, and publication dates to help identify and analyze security issues.
| CVE | Summary | Source | Max CVSS | EPSS % | Published | Updated |
|---|---|---|---|---|---|---|
| CVE-2008-4963 | Unspecified vulnerability in the VLAN Trunking Protocol (VTP) implementation on Cisco IOS and CatOS, when the VTP operating mode is not transparent, allows remote attackers to cause a denial of service (device reload or hang) via a crafted VTP packet sent to a switch interface configured as a trunk port. | [email protected] | 7.1 | 1.68% | 2008-11-06 | 2026-06-16 |
| CVE-2007-5651 | Unspecified vulnerability in the Extensible Authentication Protocol (EAP) implementation in Cisco IOS 12.3 and 12.4 on Cisco Access Points and 1310 Wireless Bridges (Wireless EAP devices), IOS 12.1 and 12.2 on Cisco switches (Wired EAP devices), and CatOS 6.x through 8.x on Cisco switches allows remote attackers to cause a denial of service (device reload) via a crafted EAP Response Identity packet. | [email protected] | 7.1 | 1.83% | 2007-10-23 | 2026-06-16 |
| CVE-2007-5134 | Cisco Catalyst 6500 and Cisco 7600 series devices use 127/8 IP addresses for Ethernet Out-of-Band Channel (EOBC) internal communication, which might allow remote attackers to send packets to an interface for which network exposure was unintended. | [email protected] | 5.0 | 2.48% | 2007-09-27 | 2026-06-16 |
| CVE-2006-4775 | The VLAN Trunking Protocol (VTP) feature in Cisco IOS 12.1(19) and CatOS allows remote attackers to cause a denial of service by sending a VTP update with a revision value of 0x7FFFFFFF, which is incremented to 0x80000000 and is interpreted as a negative number in a signed context. | [email protected] | 7.8 | 4.75% | 2006-09-13 | 2026-06-16 |
| CVE-2005-4258 | Unspecified Cisco Catalyst Switches allow remote attackers to cause a denial of service (device crash) via an IP packet with the same source and destination IPs and ports, and with the SYN flag set (aka LanD). NOTE: the provenance of this issue is unknown; the details are obtained solely from the BID. | [email protected] | 7.8 | 2.05% | 2005-12-15 | 2026-06-16 |
| CVE-2004-1775 | Cisco VACM (View-based Access Control MIB) for Catalyst Operating Software (CatOS) 5.5 and 6.1 and IOS 12.0 and 12.1 allows remote attackers to read and modify device configuration via the read-write community string. | [email protected] | 5.0 | 1.70% | 2004-12-31 | 2026-06-16 |
| CVE-2004-0551 | Cisco CatOS 5.x before 5.5(20) through 8.x before 8.2(2) and 8.3(2)GLX, as used in Catalyst switches, allows remote attackers to cause a denial of service (system crash and reload) by sending invalid packets instead of the final ACK portion of the three-way handshake to the (1) Telnet, (2) HTTP, or (3) SSH services, aka "TCP-ACK DoS attack." | [email protected] | 5.0 | 3.13% | 2004-08-06 | 2026-06-16 |
| CVE-2003-1002 | Cisco Firewall Services Module (FWSM) in Cisco Catalyst 6500 and 7600 series devices allows remote attackers to cause a denial of service (crash and reload) via an SNMPv3 message when snmp-server is set. | [email protected] | 5.0 | 1.27% | 2004-01-05 | 2026-06-16 |
| CVE-2003-1001 | Buffer overflow in the Cisco Firewall Services Module (FWSM) in Cisco Catalyst 6500 and 7600 series devices allows remote attackers to cause a denial of service (crash and reload) via HTTP auth requests for (1) TACACS+ or (2) RADIUS authentication. | [email protected] | 5.0 | 1.38% | 2004-01-05 | 2026-06-16 |
| CVE-2003-0216 | Unknown vulnerability in Cisco Catalyst 7.5(1) allows local users to bypass authentication and gain access to the enable mode without a password. | [email protected] | 9.3 | 1.90% | 2003-05-12 | 2026-06-16 |
| CVE-2002-2316 | Cisco Catalyst 4000 series switches running CatOS 5.5.5, 6.3.5, and 7.1.2 do not always learn MAC addresses from a single initial packet, which causes unicast traffic to be broadcast across the switch and allows remote attackers to obtain sensitive network information by sniffing. | [email protected] | 5.0 | 1.23% | 2002-12-31 | 2026-06-16 |
| CVE-2002-1222 | Buffer overflow in the embedded HTTP server for Cisco Catalyst switches running CatOS 5.4 through 7.3 allows remote attackers to cause a denial of service (reset) via a long HTTP request. | [email protected] | 7.1 | 8.64% | 2002-10-28 | 2026-06-16 |
| CVE-2002-1024 | Cisco IOS 12.0 through 12.2, when supporting SSH, allows remote attackers to cause a denial of service (CPU consumption) via a large packet that was designed to exploit the SSH CRC32 attack detection overflow (CVE-2001-0144). | [email protected] | 7.1 | 3.30% | 2002-10-04 | 2026-06-16 |
| CVE-2001-1071 | Cisco IOS 12.2 and earlier running Cisco Discovery Protocol (CDP) allows remote attackers to cause a denial of service (memory consumption) via a flood of CDP neighbor announcements. | [email protected] | 5.0 | 2.31% | 2001-10-09 | 2026-06-16 |
| CVE-2001-0429 | Cisco Catalyst 5000 series switches 6.1(2) and earlier will forward an 802.1x frame on a Spanning Tree Protocol (STP) blocked port, which causes a network storm and a denial of service. | [email protected] | 5.0 | 1.44% | 2001-07-02 | 2026-06-16 |
| CVE-2001-0041 | Memory leak in Cisco Catalyst 4000, 5000, and 6000 series switches allows remote attackers to cause a denial of service via a series of failed telnet authentication attempts. | [email protected] | 7.8 | 12.14% | 2001-02-16 | 2026-06-16 |
| CVE-2000-0267 | Cisco Catalyst 5.4.x allows a user to gain access to the "enable" mode without a password. | [email protected] | 4.6 | 0.36% | 2000-04-20 | 2026-06-16 |