CVE-2018-15369

A vulnerability in the TACACS+ client subsystem of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability is due to improper handling of crafted TACACS+ response packets by the affected software. An attacker could exploit this vulnerability by injecting a crafted TACACS+ packet into an existing TACACS+ session between an affected device and a TACACS+ server or by impersonating a known, valid TACACS+ server and sending a crafted TACACS+ packet to an affected device when establishing a connection to the device. To exploit this vulnerability by using either method, the attacker must know the shared TACACS+ secret and the crafted packet must be sent in response to a TACACS+ request from a TACACS+ client. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition.

• CWE-20
• CWE-20

• http://www.securityfocus.com/bid/105426Third Party Advisory, VDB Entry
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180926-tacplusVendor Advisory
• http://www.securityfocus.com/bid/105426Third Party Advisory, VDB Entry
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180926-tacplusVendor Advisory

Published

Oct 5, 2018

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2018-15363An Out-of-Bounds Read Privilege Escalation vulnerability in …
• CVE-2018-15364A Named Pipe Request Processing Out-of-Bounds Read Informati…
• CVE-2018-15365A Reflected Cross-Site Scripting (XSS) vulnerability in Tren…
• CVE-2018-15366A UrlfWTPPagePtr KERedirect Use-After-Free Privilege Escalat…
• CVE-2018-15367A ctl_set KERedirect Untrusted Pointer Dereference Privilege…
• CVE-2018-15368A vulnerability in the CLI parser of Cisco IOS XE Software c…6.7
• CVE-2018-15370A vulnerability in Cisco IOS ROM Monitor (ROMMON) Software f…
• CVE-2018-15371A vulnerability in the shell access request mechanism of Cis…
• CVE-2018-15372A vulnerability in the MACsec Key Agreement (MKA) using Exte…
• CVE-2018-15373A vulnerability in the implementation of Cisco Discovery Pro…
• CVE-2018-15374A vulnerability in the Image Verification feature of Cisco I…
• CVE-2018-15375A vulnerability in the embedded test subsystem of Cisco IOS …