Cisco發布了安全公告以應對發現於Cisco IOS、IOS XE、IOS XR及NX-OS軟件中的多個漏洞。未獲認證的遠端攻擊者可以向受影響系統發出特製的查詢或產生大量連接，從而攻擊這些漏洞。獲認證的攻擊者可以向受影響系統發出特製的查詢、加載可疑軟件映像，執行任意指令或插入惡意USB裝置，從而攻擊這些漏洞。
有關受影響系統的詳細資料，請參閱供應商網站的相應安全公告中有關“Affected Products”的部分。
成功利用這些漏洞的攻擊者可以在受影響的系統導致泄漏資訊、服務受阻斷、執行任意指令、篡改、權限提升、繞過保安限制或控制受影響的系統。
適用於受影響系統的軟件更新已可獲取。受影響系統的系統管理員應遵從產品供應商的建議，立即採取行動以降低風險。有關修補程式的詳細資料，請參閱供應商網站的相應安全公告中有關 “Fixed Software” 的部分。
系統管理員可聯絡其產品支援供應商，以取得修補程式及有關支援。
https://tools.cisco.com/security/center/viewErp.x?alertId=ERP-72547
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190925-awr
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190925-ctspac-dos
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190925-dt
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190925-ftp
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190925-http-client
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190925-httpserv-dos
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190925-identd-dos
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190925-ios-gos-auth
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190925-iosxe-codeexec
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190925-iosxe-ctbypass
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190925-iosxe-digsig-bypass
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190925-iosxe-fsdos
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190925-iox
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190925-iox-gs
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190925-isdn-data-leak
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190925-nxos-vman-cmd-inj
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190925-rawtcp-dos
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190925-sbxss
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190925-sip-alg
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190925-sip-dos
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190925-tsec
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190925-utd
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190925-vman
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190925-vman-cmd-injection
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190925-webui-cmd-injection
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190925-xr-asr9k-privesc
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190925-xss
https://www.hkcert.org/my_url/zh/alert/19092601
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-12646 (to CVE-2019-12651)
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-12653 (to CVE-2019-12672)
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-12709
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-12717