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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.018 (77.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 78th percentile — 77.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.018 · newest: 0.018 · change: 0.000
Affected products
- Cisco iOS Xe Software
- 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
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-aaa-Yx47… (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.