Auth bypass in Cisco Enterprise Nfv Infrastructure Software
CVE-2021-34746
A vulnerability in the TACACS+ authentication, authorization and accounting (AAA) feature of Cisco Enterprise NFV Infrastructure Software (NFVIS) could allow an unauthenticated, remote attacker to bypass authentication and log in to an affected device as an administrator. This vulnerability is due to incomplete validation of user-supplied input that is passed to an authentication script. An attacker could exploit this vulnerability by injecting parameters into an authentication request. A successful exploit could allow the attacker to bypass authentication and log in as an administrator to the affected device.
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: 0.177 (97.1th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 97.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.177 · newest: 0.177 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nfvis-g2… (vendor-advisory, Vendor Advisory)
- github.com/orangecertcc/security-research/security/advisories/GHSA-gqx8-c4xr-c6… (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-34746?
- CVE-2021-34746 is a critical-severity vulnerability in Cisco Enterprise Nfv Infrastructure Software, classified under CWE-289. CVSS score: 9.8/10. Published 2021-09-02.
- How severe is CVE-2021-34746?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2021-34746 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.