CVE-2021-40113
10.0
CRITICAL · CVSS 3.1 · EPSS 4.6% (pctl 91)
In your normal cycle
Critical by CVSS (10), but no sign of active exploitation.
Description
Multiple vulnerabilities in the web-based management interface of the Cisco Catalyst Passive Optical Network (PON) Series Switches Optical Network Terminal (ONT) could allow an unauthenticated, remote attacker to perform the following actions: Log in with a default credential if the Telnet protocol is enabled Perform command injection Modify the configuration For more information about these vulnerabilities, see the Details section of this advisory.
Scoring
| CVSS | 10.0 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
| EPSS | 4.63% — more likely to be exploited than 91% of all CVEs |
| Weakness | CWE-284 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2021-11-04 |
| Last modified | 2026-06-17 |
Affected (10)
| Vendor | Product |
|---|---|
| cisco | catalyst pon switch cgp-ont-1p |
| cisco | catalyst pon switch cgp-ont-1p firmware |
| cisco | catalyst pon switch cgp-ont-4p |
| cisco | catalyst pon switch cgp-ont-4p firmware |
| cisco | catalyst pon switch cgp-ont-4pv |
| cisco | catalyst pon switch cgp-ont-4pv firmware |
| cisco | catalyst pon switch cgp-ont-4pvc |
| cisco | catalyst pon switch cgp-ont-4pvc firmware |
| cisco | catalyst pon switch cgp-ont-4tvcw |
| cisco | catalyst pon switch cgp-ont-4tvcw firmware |
References
→ the Explorer · watch your stack · NVD