CVE-2021-34746
9.8
CRITICAL · CVSS 3.1 · EPSS 17.7% (pctl 97)
Patch early
EPSS 17.7% — above the 10% action threshold.
Description
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.
Scoring
| CVSS | 9.8 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 17.66% — more likely to be exploited than 97% of all CVEs |
| Weakness | CWE-289 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2021-09-02 |
| Last modified | 2026-06-17 |
Affected (1)
| Vendor | Product |
|---|---|
| cisco | enterprise nfv infrastructure software |
References
- https://github.com/orangecertcc/security-research/security/advisories/GHSA-gqx8-c4xr-c664
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nfvis-g2DMVVh
- https://github.com/orangecertcc/security-research/security/advisories/GHSA-gqx8-c4xr-c664
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nfvis-g2DMVVh
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