CVE-2021-40112
CRITICALCisco Catalyst PON Series Switches ONT Firmware - Unauthenticated Improper Access Control
Title source: llmDescription
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.
References (1)
Core 1
Core References
Patch, Vendor Advisory vendor-advisory
x_refsource_cisco
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-catpon-multivulns-CE3DSYGr
Scores
CVSS v3
10.0
EPSS
0.0160
EPSS Percentile
82.0%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
total
Details
CWE
CWE-284
Status
published
Products (5)
cisco/catalyst_pon_switch_cgp-ont-1p_firmware
< 1.1.1.14
cisco/catalyst_pon_switch_cgp-ont-4p_firmware
< 1.1.3.17
cisco/catalyst_pon_switch_cgp-ont-4pv_firmware
< 1.1.3.17
cisco/catalyst_pon_switch_cgp-ont-4pvc_firmware
< 1.1.3.17
cisco/catalyst_pon_switch_cgp-ont-4tvcw_firmware
< 1.1.3.17
Published
Nov 04, 2021
Tracked Since
Feb 18, 2026