CVE-2021-1623

HIGH

Cisco IOS XE < 17.6.1a - Authenticated Denial of Service via SNMP Punt Path Overload

Title source: llm
STIX 2.1

Description

A vulnerability in the Simple Network Management Protocol (SNMP) punt handling function of Cisco cBR-8 Converged Broadband Routers could allow an authenticated, remote attacker to overload a device punt path, resulting in a denial of service (DoS) condition. This vulnerability is due to the punt path being overwhelmed by large quantities of SNMP requests. An attacker could exploit this vulnerability by sending a large number of SNMP requests to an affected device. A successful exploit could allow the attacker to overload the device punt path, resulting in a DoS condition.

References (1)

Core 1
Core References

Scores

CVSS v3 7.7
EPSS 0.0034
EPSS Percentile 57.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-399
Status published
Products (1)
cisco/ios_xe < 17.6.1a
Published Sep 23, 2021
Tracked Since Feb 18, 2026