Vulnerability in Cisco iOS Xe Software
CVE-2021-1619
A vulnerability in the authentication, authorization, and accounting (AAA) function of Cisco IOS XE Software could allow an unauthenticated, remote attacker to bypass NETCONF or RESTCONF authentication and do either of the following: Install, manipulate, or delete the configuration of an affected device Cause memory corruption that results in a denial of service (DoS) on an affected device This vulnerability is due to an uninitialized variable. An attacker could exploit this vulnerability by sending a series of NETCONF or RESTCONF requests to an affected device. A successful exploit could allow the attacker to use NETCONF or RESTCONF to install, manipulate, or delete the configuration of a network device or to corrupt memory on the device, resulting a DoS.
EPSS: 0.018 (76.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Cisco Ios Xe Software — versions n/a
- Cisco Ios_xe — versions 16.3.1, 16.3.1a, 16.3.2
- Cisco Ios_xe_sd-wan
- Cisco Ios_xe_sd-wan_16.10.1_when_installed_on_1000_series_integrated_services — versions routers
- Cisco Ios_xe_sd-wan_16.10.1_when_installed_on_4000_series_integrated_services — versions routers
- Cisco Ios_xe_sd-wan_16.10.1_when_installed_on_asr_1000_series_aggregation_services — versions routers
- Cisco Ios_xe_sd-wan_16.10.1_when_installed_on_integrated_services_virtual — versions router
- Cisco Ios_xe_sd-wan_16.10.2_when_installed_on_1000_series_integrated_services — versions routers
- Cisco Ios_xe_sd-wan_16.10.2_when_installed_on_4000_series_integrated_services — versions routers
- Cisco Ios_xe_sd-wan_16.10.2_when_installed_on_asr_1000_series_aggregation_services — versions routers
Weakness classification (CWE)
References
- psirt@cisco.com (x_refsource_CISCO, vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-1619?
- CVE-2021-1619 is a critical-severity vulnerability in Cisco iOS Xe Software, classified under Access of Uninitialized Pointer. CVSS score: 9.8/10. Published 2021-09-23.
- How severe is CVE-2021-1619?
- Critical severity. CVSS v3 base score is 9.8 out of 10.