---
id: CVE-2021-34758
title: >-
  Cisco TelePresence Collaboration Endpoint and RoomOS Software Denial of
  Service Vulnerability
summary: >-
  It was previously published that a vulnerability in the memory management of
  Cisco TelePresence Collaboration Endpoint (CE) Software and Cisco RoomOS
  Software could allow an authenticated, local attacker to corrupt a shared
  memory segment,…
severity: none
vendor: Cisco
product: Cisco TelePresence Endpoint Software (TC/CE)
affected:
  - telepresence_endpoint_software_tc_ce
published: '2021-10-06'
updated: '2021-10-15'
sourceUpdated: '2021-10-15T21:03:56+00:00'
source: CSAF
sourceUrl: >-
  https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-tpce-rmos-mem-dos-rck56tT
references:
  - url: >-
      https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-tpce-rmos-mem-dos-rck56tT
  - url: 'https://software.cisco.com'
tags:
  - csaf
  - vendor-advisory
  - cisco
epss: 0.00186
epssPercentile: 0.07344
ingestedAt: '2026-09-08T15:58:18.537Z'
---

## Overview

It was previously published that a vulnerability in the memory management of Cisco TelePresence Collaboration Endpoint (CE) Software and Cisco RoomOS Software could allow an authenticated, local attacker to corrupt a shared memory segment, resulting in a denial of service (DoS) condition.

This vulnerability is due to insufficient access controls to a shared memory resource. An attacker could exploit this vulnerability by corrupting a shared memory segment on an affected device. A successful exploit could allow the attacker to cause the device to reload. The device will recover from the corruption upon reboot.

After additional investigation it was determined that this vulnerability is not exploitable in production software. Cisco has provided software updates for this issue.

## Vendor advisories

- **cisco-sa-tpce-rmos-mem-dos-rck56tT** · Cisco · affected: Cisco TelePresence Endpoint Software (TC/CE) · updated 2021-10-15 · [advisory](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-tpce-rmos-mem-dos-rck56tT)

**Cisco TelePresence Collaboration Endpoint and  RoomOS Software Denial of Service Vulnerability**. Released 2021-10-06, updated 2021-10-15.

Affected:

- Cisco TelePresence Endpoint Software (TC/CE)

## Remediation

Cisco has released software updates that address this vulnerability. https://software.cisco.com