Security readout for executives and security teams
This issue can make affected Cisco IOS or IOS XE network devices reload when they process a malicious TACACS+ response. The result is a denial of service, which can disrupt routing, switching, or administrative access. Exploitation requires the attacker to know the TACACS+ shared secret and be able to inject or impersonate TACACS+ responses. Exposure is most likely in organizations running Cisco IOS or IOS XE devices configured to use TACACS+ for AAA. Practical exposure depends on whether an attacker can reach the TACACS+ path or impersonate the server and has the shared TACACS+ secret. Treat as a priority for network infrastructure teams, especially where TACACS+ is used for administrative authentication. It is not supported as an internet-wide emergency by the provided evidence, but device reloads can affect core availability. Mitigation focus: Review Cisco’s advisory for affected releases and vendor-approved fixed software.; Inventory IOS and IOS XE devices using TACACS+ client authentication.; Restrict TACACS+ traffic to trusted devices and management networks..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-20: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2018-15369 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- 20180926 Cisco IOS and IOS XE Software TACACS+ Client Denial of Service VulnerabilityCVE reference · vendor-advisory, x_refsource_CISCO
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.