Land IP denial of service.
Max CVSS
5.0
EPSS Score
0.15%
Published
1997-12-01
Updated
2008-09-09
Cisco IOS 12.0 and other versions can be crashed by malicious UDP packets to the syslog port.
Max CVSS
5.0
EPSS Score
0.28%
Published
1999-01-11
Updated
2022-08-17
Cisco PIX firewall and CBAC IP fragmentation attack results in a denial of service.
Max CVSS
5.0
EPSS Score
2.15%
Published
1998-08-18
Updated
2018-10-30
Attackers can crash a Cisco IOS router or device, provided they can get to an interactive prompt (such as a login). This applies to some IOS 9.x, 10.x, and 11.x releases.
Max CVSS
5.0
EPSS Score
2.07%
Published
1998-08-12
Updated
2022-08-17
The "established" keyword in some Cisco IOS software allowed an attacker to bypass filtering.
Max CVSS
5.0
EPSS Score
1.22%
Published
1998-09-01
Updated
2022-08-17
Buffer overflow in Cisco 7xx routers through the telnet service.
Max CVSS
5.0
EPSS Score
2.07%
Published
1997-12-15
Updated
2008-09-09
In Cisco routers under some versions of IOS 12.0 running NAT, some packets may not be filtered by input access list filters.
Max CVSS
5.0
EPSS Score
1.22%
Published
1999-04-01
Updated
2008-09-09
Cisco IOS 11.x and 12.x allows remote attackers to cause a denial of service by sending the ENVIRON option to the Telnet daemon before it is ready to accept it, which causes the system to reboot.
Max CVSS
5.0
EPSS Score
0.65%
Published
2000-04-20
Updated
2008-09-10
Buffer overflow in Cisco TACACS+ tac_plus server allows remote attackers to cause a denial of service via a malformed packet with a long length field.
Max CVSS
5.0
EPSS Score
0.73%
Published
2000-05-30
Updated
2017-10-10
Cisco Gigabit Switch Routers (GSR) with Fast Ethernet / Gigabit Ethernet cards, from IOS versions 11.2(15)GS1A up to 11.2(19)GS0.2 and some versions of 12.0, do not properly handle line card failures, which allows remote attackers to bypass ACLs or force the interface to stop forwarding packets.
Max CVSS
5.0
EPSS Score
0.73%
Published
2000-10-20
Updated
2008-09-05
The HTTP server in Cisco IOS 12.0 through 12.1 allows local users to cause a denial of service (crash and reload) via a URL containing a "?/" string.
Max CVSS
5.0
EPSS Score
0.04%
Published
2000-12-19
Updated
2018-05-03
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.
Max CVSS
5.0
EPSS Score
1.76%
Published
2001-09-20
Updated
2017-10-10
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.
Max CVSS
5.0
EPSS Score
0.21%
Published
2001-08-31
Updated
2017-12-19
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.
Max CVSS
5.0
EPSS Score
0.73%
Published
2001-10-18
Updated
2017-10-10
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.
Max CVSS
5.0
EPSS Score
2.64%
Published
2001-10-09
Updated
2017-10-10
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.
Max CVSS
5.0
EPSS Score
3.10%
Published
2001-07-24
Updated
2017-12-19
PPTP implementation in Cisco IOS 12.1 and 12.2 allows remote attackers to cause a denial of service (crash) via a malformed packet.
Max CVSS
5.0
EPSS Score
1.46%
Published
2001-07-12
Updated
2017-10-10
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 string if one has not been previously created.
Max CVSS
5.0
EPSS Score
0.47%
Published
2001-02-28
Updated
2017-07-11
Cisco IOS 11.1CC through 12.2 with Cisco Express Forwarding (CEF) enabled includes portions of previous packets in the padding of a MAC level packet when the MAC packet's length is less than the IP level packet length.
Max CVSS
5.0
EPSS Score
0.39%
Published
2002-06-25
Updated
2008-09-05
Cisco IOS 11.1 through 12.2, when HSRP support is not enabled, allows remote attackers to cause a denial of service (CPU consumption) via randomly sized UDP packets to the Hot Standby Routing Protocol (HSRP) port 1985.
Max CVSS
5.0
EPSS Score
1.06%
Published
2002-12-31
Updated
2017-07-11
Cisco 2611 router running IOS 12.1(6.5), possibly an interim release, allows remote attackers to cause a denial of service via port scans such as (1) scanning all ports on a single host and (2) scanning a network of hosts for a single open port through the router. NOTE: the vendor could not reproduce this issue, saying that the original reporter was using an interim release of the software.
Max CVSS
5.0
EPSS Score
0.24%
Published
2002-12-31
Updated
2008-09-05
The design of the Hot Standby Routing Protocol (HSRP), as implemented on Cisco IOS 12.1, when using IRPAS, allows remote attackers to cause a denial of service (CPU consumption) via a router with the same IP address as the interface on which HSRP is running, which causes a loop.
Max CVSS
5.0
EPSS Score
0.21%
Published
2002-12-31
Updated
2008-09-05
The Service Assurance Agent (SAA) in Cisco IOS 12.0 through 12.2, aka Response Time Reporter (RTR), allows remote attackers to cause a denial of service (crash) via malformed RTR packets to port 1967.
Max CVSS
5.0
EPSS Score
0.19%
Published
2003-06-09
Updated
2017-10-11
The web server for Cisco Aironet AP1x00 Series Wireless devices running certain versions of IOS 12.2 allow remote attackers to cause a denial of service (reload) via a malformed URL.
Max CVSS
5.0
EPSS Score
2.43%
Published
2003-08-27
Updated
2017-10-11
Cisco IOS 12.2 and earlier generates a "% Login invalid" message instead of prompting for a password when an invalid username is provided, which allows remote attackers to identify valid usernames on the system and conduct brute force password guessing, as reported for the Aironet Bridge.
Max CVSS
5.0
EPSS Score
0.52%
Published
2003-08-27
Updated
2017-10-11
105 vulnerabilities found
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