Vulnerability · Published Nov 4, 2021 · Assigned by cisco

CVE-2021-40112Cisco Catalyst PON Series Switches Optical Network Terminal Vulnerabilities

Critical 10.0

In plain English

A critical-severity improper access control in Cisco Catalyst PON Series from Cisco. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.4% (higher than 72% of all known vulnerabilities).

Severity (CVSS 3.1)10.0Critical

Exploit odds (30 days)1.4%top 27.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
Cisco	Cisco Catalyst PON Series	n/a

Weakness: CWE-284 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

References

20211103 Cisco Catalyst PON Series Switches Optical Network Terminal Vulnerabilities vendor-advisory, x_refsource_CISCO