CVE-2021-40113

CRITICAL

Cisco Catalyst Pon Switch Cgp-ont-1p ... - Improper Access Control

Title source: rule

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.

Exploits (1)

nomisec SUSPICIOUS

by karamMahmad · poc

https://github.com/karamMahmad/CVE-2021-40113

View Code ZIP pw:eip

References (1)

[Patch, Vendor Advisory] https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-catpon-multivulns-CE3DSYGr

Scores

CVSS v3 10.0

EPSS 0.1367

EPSS Percentile 94.3%

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 CWE-78

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-4pvc_firmware < 1.1.3.17

cisco/catalyst_pon_switch_cgp-ont-4pv_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