AUGUST 4, 2026
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Case File

CVE-2021-40113

CRITICAL · CVSS 10 EPSS 4.63%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-11-04 · Last synced 2026-08-04

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CVE
CVE-2021-40113
Severity
CRITICAL
CVSS
10
EPSS
4.63%
Cisco

Original NVD 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.