95 CVEs matched to Cisco by name in NVD, none on CISA's Known Exploited list.
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1 CVE has an estimated 10%-or-higher chance of having already been exploited despite not appearing on CISA's KEV catalog. KEV is a curated record of confirmed cases rather than a complete census, so this is where its coverage is likely thinnest — an estimate from EPSS history, not a finding. Based on a median of 2 EPSS observations per CVE.
Likely-exploited estimates here rest on a median of 2 EPSS observations per CVE — too little history to read as a trend yet. It deepens daily as scores are collected.
HTTP server for Cisco IOS 11.3 to 12.2 allows attackers to bypass authentication and execute arbitrary commands, when local authorization is being used, by spec…
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 authentica…
The IOS HTTP service in Cisco routers and switches running IOS 11.1 through 12.1 allows remote attackers to cause a denial of service by requesting a URL that c…
| Year | Critical | High | Medium | Low | Unscored | Total |
|---|---|---|---|---|---|---|
| 2001 | 0 | 18 | 28 | 6 | 0 | 52 |
| 2000 | 0 | 3 | 7 | 1 | 0 | 11 |
| 1999 | 0 | 8 | 9 | 3 | 0 | 20 |
| 1998 | 0 | 2 | 3 | 1 | 0 | 6 |
| 1997 | 0 | 1 | 1 | 0 | 0 | 2 |
| 1995 | 0 | 1 | 0 | 0 | 0 | 1 |
| 1993 | 0 | 1 | 0 | 0 | 0 | 1 |
| 1992 | 0 | 2 | 0 | 0 | 0 | 2 |
EPSS is FIRST's estimate of the chance a CVE is exploited in the next 30 days. It measures likelihood, not impact.
| CVE | EPSS | Percentile |
|---|---|---|
| CVE-2001-0537 | 68% | 99% |
| CVE-2000-0380 | 35% | 98% |
| CVE-2001-0041 | 12% | 96% |
| CVE-2001-0375 | 10% | 96% |
| CVE-2001-0748 | 9.2% | 95% |
| CVE-2000-0613 | 9.2% | 95% |
| CVE-2001-0080 | 8.9% | 95% |
| CVE-1999-0063 | 8.2% | 95% |
| CVE-2000-1022 | 7.1% | 94% |
| CVE-2001-0566 | 6.4% | 94% |
Cisco 12000 with IOS 12.0 and line cards based on Engine 2 does not properly handle the implicit "deny ip any any" rule in an outgoing ACL when the ACL contains exactly 448 entries, which can allow so…
Cisco 12000 with IOS 12.0 and line cards based on Engine 2 does not block non-initial packet fragments, which allows remote attackers to bypass the ACL.
Cisco PIX Firewall 515 and 520 with 5.1.4 OS running aaa authentication to a TACACS+ server allows remote attackers to cause a denial of service via a large num…
Cisco Secure PIX Firewall does not properly identify forged TCP Reset (RST) packets, which allows remote attackers to force the firewall to close legitimate con…
Cisco 12000 with IOS 12.0 and line cards based on Engine 2 and earlier allows remote attackers to cause a denial of service (CPU consumption) by flooding the router with traffic that generates a large…
Cisco 12000 with IOS 12.0 and line cards based on Engine 2 does not handle the "fragment" keyword in a compiled ACL (Turbo ACL) for packets that are sent to the router, which allows remote attackers t…
Cisco IOS Firewall Feature set, aka Context Based Access Control (CBAC) or Cisco Secure Integrated Software, for IOS 11.2P through 12.2T does not properly check the IP protocol type, which could allow…
Multiple Cisco networking products allow remote attackers to cause a denial of service on the local network via a series of ARP packets sent to the router's interface that contains a different MAC add…
Various Intrusion Detection Systems (IDS) including (1) Cisco Secure Intrusion Detection System, (2) Cisco Catalyst 6000 Intrusion Detection System Module, (3) Dragon Sensor 4.x, (4) Snort before 1.8.…
Cisco IOS 12.1(2)T, 12.1(3)T allow remote attackers to cause a denial of service (reload) via a connection to TCP ports 3100-3999, 5100-5999, 7100-7999 and 10100-10999.
Cisco Hot Standby Routing Protocol (HSRP) allows local attackers to cause a denial of service by spoofing HSRP packets.
Acme.Serve 1.7, as used in Cisco Secure ACS Unix and possibly other products, allows remote attackers to read arbitrary files by prepending several / (slash) characters to the URI.
Cisco TFTP server 1.1 allows remote attackers to read arbitrary files via a ..(dot dot) attack in the GET command.
Cisco 6400 Access Concentrator Node Route Processor 2 (NRP2) 12.1DC card does not properly disable access when a password has not been set for vtys, which allows remote attackers to obtain access via …
Cisco CBOS 2.3.8 and earlier allows remote attackers to cause a denial of service via a series of large ICMP ECHO REPLY (ping) packets, which cause it to enter ROMMON mode and stop forwarding packets.
Cisco CBOS 2.3.8 and earlier stores the passwords for (1) exec and (2) enable in cleartext in the NVRAM and a configuration file, which could allow unauthorized users to obtain the passwords and gain …
Cisco CBOS 2.3.8 and earlier allows remote attackers to cause a denial of service via an ICMP ECHO REQUEST (ping) with the IP Record Route option set.
Cisco switches and routers running CBOS 2.3.8 and earlier use predictable TCP Initial Sequence Numbers (ISN), which allows remote attackers to spoof or hijack TCP connections.
Cisco PIX firewall manager (PFM) 4.3(2)g logs the enable password in plaintext in the pfm.log file, which could allow local users to obtain the password by reading the file.
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.
Cisco devices IOS 12.0 and earlier allow a remote attacker to cause a crash, or bad route updates, via malformed BGP updates with unrecognized transitive attribute.
RSA BSAFE SSL-J 3.0, 3.0.1 and 3.1, as used in Cisco iCND 2.0, caches session IDs from failed login attempts, which could allow remote attackers to bypass SSL client authentication and gain access to …
Cisco IOS 11.x and 12.0 with ATM support allows attackers to cause a denial of service via the undocumented Interim Local Management Interface (ILMI) SNMP community string.
Web-based configuration utility in Cisco 600 series routers running CBOS 2.0.1 through 2.4.2ap binds itself to port 80 even when web-based configuration services are disabled, which could leave the ro…
Cisco 600 series routers running CBOS 2.0.1 through 2.4.2ap allows remote attackers to cause a denial of service via multiple connections to the router on the (1) HTTP or (2) telnet service, which cau…
Cisco Catalyst 2900XL switch allows a remote attacker to create a denial of service via an empty UDP packet sent to port 161 (SNMP) when SNMP is disabled.
The web management service on Cisco Content Service series 11000 switches (CSS) before WebNS 4.01B29s or WebNS 4.10B17s allows a remote attacker to gain additional privileges by directly requesting th…
The FTP server on Cisco Content Service 11000 series switches (CSS) before WebNS 4.01B23s and WebNS 4.10B13s allows an attacker who is an FTP user to read and write arbitrary files via GET or PUT comm…
Cisco routers and switches running IOS 12.0 through 12.2.1 allows a remote attacker to cause a denial of service via a flood of UDP packets.
HTTP server for Cisco IOS 11.3 to 12.2 allows attackers to bypass authentication and execute arbitrary commands, when local authorization is being used, by specifying a high access level in the URL.
PPTP implementation in Cisco IOS 12.1 and 12.2 allows remote attackers to cause a denial of service (crash) via a malformed packet.
Cisco SN 5420 Storage Router 1.1(3) and earlier allows remote attackers to cause a denial of service (reboot) via a series of connections to TCP port 8023.
Cisco VPN 3000 series concentrators before 2.5.2(F) allow remote attackers to cause a denial of service via an IP packet with an invalid IP option.
Cisco CBOS 2.3.0.053 sends output of the "sh nat" (aka "show nat") command to the terminal of the next user who attempts to connect to the router via telnet, which could allow that user to obtain sens…
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.
Cisco Aironet 340 Series wireless bridge before 8.55 does not properly disable access to the web interface, which allows remote attackers to modify its configuration.
Cisco Content Services (CSS) switch products 11800 and earlier, aka Arrowpoint, allows local users to gain privileges by entering debug mode.
Cisco VPN 3000 series concentrators before 2.5.2(F) allow remote attackers to cause a denial of service via a flood of invalid login requests to (1) the SSL service, or (2) the telnet service, which d…
Cisco PIX Firewall 515 and 520 with 5.1.4 OS running aaa authentication to a TACACS+ server allows remote attackers to cause a denial of service via a large number of authentication requests.
Cisco switches and routers running IOS 12.1 and earlier produce predictable TCP Initial Sequence Numbers (ISNs), which allows remote attackers to spoof or hijack TCP connections.
Classic Cisco IOS 9.1 and later allows attackers with access to the login prompt to obtain portions of the command history of previous users, which may allow the attacker to access sensitive data.
Cisco IOS 12.1(3) and 12.1(3)T allows remote attackers to read and modify device configuration data via the cable-docsis read-write community string used by the Data Over Cable Service Interface Speci…
Cisco IOS 12.0(5)XU through 12.1(2) allows remote attackers to read system administration and topology information via an "snmp-server host" command, which creates a readable "community" community str…
CBOS 2.4.1 and earlier in Cisco 600 routers allows remote attackers to cause a denial of service via a slow stream of TCP SYN packets.
The Web interface to Cisco 600 routers running CBOS 2.4.1 and earlier allow remote attackers to cause a denial of service via a URL that does not end in a space character.
Cisco 600 routers running CBOS 2.4.1 and earlier allow remote attackers to cause a denial of service via a large ICMP echo (ping) packet.
The Cisco Web Management interface in routers running CBOS 2.4.1 and earlier does not log invalid logins, which allows remote attackers to guess passwords without detection.
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.
Directory traversal vulnerability in Arrowpoint (aka Cisco Content Services, or CSS) allows local unprivileged users to read arbitrary files via a .. (dot dot) attack.
Arrowpoint (aka Cisco Content Services, or CSS) allows local users to cause a denial of service via a long argument to the "show script," "clear script," "show archive," "clear archive," "show log," o…
Cisco Catalyst 6000, 5000, or 4000 switches allow remote attackers to cause a denial of service by connecting to the SSH service with a non-SSH client, which generates a protocol mismatch error.
Cisco SN 5420 Storage Router 1.1(3) and earlier allows local users to access a developer's shell without a password and execute certain restricted commands without being logged.