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ios

Vendor: Cisco • 618 CVEs

CVEs (618)

CVE
VENDORS
PRODUCTS
UPDATED
PUBLISHED
CVSS
1Cisco
1Ios
Apr 16, 2026
Aug 12, 2002
N/A· v4
N/A· v3
7.1 HIGH· v2
Heap-based buffer overflow in the TFTP server capability in Cisco IOS 11.1, 11.2, and 11.3 allows remote attackers to cause a denial of service (reset) or modify configuration via a long filename.
1Cisco
1Ios
Apr 16, 2026
Jun 25, 2002
N/A· v4
N/A· v3
5.0 MEDIUM· v2
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.
1Cisco
1Ios
Apr 16, 2026
Nov 28, 2001
N/A· v4
N/A· v3
7.5 HIGH· v2
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 remote attackers to...Show more
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 remote attackers to bypass access control lists.Show less
1Cisco
1Ios
Apr 16, 2026
Oct 18, 2001
N/A· v4
N/A· v3
5.0 MEDIUM· v2
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.
1Cisco
2Catos
Ios
Apr 16, 2026
Oct 9, 2001
N/A· v4
N/A· v3
5.0 MEDIUM· v2
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.
1Cisco
1Ios
Apr 16, 2026
Sep 20, 2001
N/A· v4
N/A· v3
5.0 MEDIUM· v2
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.
1Cisco
1Ios
Apr 16, 2026
Aug 31, 2001
N/A· v4
N/A· v3
5.0 MEDIUM· v2
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.
1Cisco
1Ios
Apr 16, 2026
Jul 24, 2001
N/A· v4
N/A· v3
5.0 MEDIUM· v2
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.
1Cisco
1Ios
Apr 16, 2026
Jul 21, 2001
N/A· v4
N/A· v3
9.3 HIGH· v2
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.
1Cisco
1Ios
Apr 16, 2026
Jul 12, 2001
N/A· v4
N/A· v3
5.0 MEDIUM· v2
PPTP implementation in Cisco IOS 12.1 and 12.2 allows remote attackers to cause a denial of service (crash) via a malformed packet.
1Cisco
1Ios
Apr 16, 2026
May 3, 2001
N/A· v4
N/A· v3
7.5 HIGH· v2
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.
1Cisco
1Ios
Apr 16, 2026
Mar 12, 2001
N/A· v4
N/A· v3
2.1 LOW· v2
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.
1Cisco
1Ios
Apr 16, 2026
Feb 28, 2001
N/A· v4
N/A· v3
7.5 HIGH· v2
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 Specification (DOCSIS) st...Show more
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 Specification (DOCSIS) standard.Show less
1Cisco
1Ios
Apr 16, 2026
Feb 28, 2001
N/A· v4
N/A· v3
5.0 MEDIUM· v2
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 b...Show more
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.Show less
1Cisco
1Ios
Sep 23, 2026
Dec 19, 2000
N/A· v4
N/A· v3
5.0 MEDIUM· v2
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.
1Cisco
4Gigabit Switch Router 12008
Gigabit Switch Router 12012Gigabit Switch Router 12016+1 more
Apr 16, 2026
Oct 20, 2000
N/A· v4
N/A· v3
5.0 MEDIUM· v2
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...Show more
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.Show less
1Cisco
2Ios
Tacacs+
Apr 16, 2026
May 30, 2000
N/A· v4
N/A· v3
5.0 MEDIUM· v2
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.
1Cisco
7Ios
Router 2500Router 2600+4 more
Apr 16, 2026
May 3, 2000
N/A· v4
N/A· v3
2.1 LOW· v2
The on-line help system options in Cisco routers allows non-privileged users without "enabled" access to obtain sensitive information via the show command.
1Cisco
1Ios
Apr 16, 2026
Apr 26, 2000
N/A· v4
N/A· v3
7.1 HIGH· v2
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 contains a %% string.
1Cisco
123660 Router
7100 Router7200 Router+9 more
Apr 16, 2026
Apr 20, 2000
N/A· v4
N/A· v3
5.0 MEDIUM· v2
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.