CVE-2021-40113
Cisco Catalyst PON Series Switches Optical Network Terminal Vulnerabilities
- Published
- Nov 4, 2021
- Updated
- Nov 7, 2024
- Assigning CNA
- cisco
- Evidence observed
- Aug 8, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:HLow · next 30 days
- Percentile
- 91.3%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
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.
Sources
1- CVE-2021-40113Informational
CVE documentation repository detailing unauthenticated remote vulnerabilities in Cisco Catalyst PON Series Switches ONT, including default credential login, command injection, and configuration modification.
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