CVE Intelligence
High

CVE-2026-20119 — Cisco TelePresence Collaboration Endpoint Software and RoomOS Software Denial of Service Vulnerability

A vulnerability in the text rendering subsystem of Cisco TelePresence Collaboration Endpoint (CE) Software and Cisco RoomOS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient validation of input received by an affected device. An attacker could exploit this vulnerability by getting the affected device to render crafted text, for example, a crafted meeting invitation. As indicated in the CVSS score, no user interaction is required, such as accepting the meeting invitation. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition.

Published Feb 4, 2026 · Updated Oct 13, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: cisco

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.
How the score was calculated
  • EPSS 0.4% (30-day exploitation probability)+5
  • Technical severity (high)+6
  • Automatable exploitation (SSVC)+3

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation
Not confirmed
Not in CISA KEV — an absence of record, not proof it is unexploited.
EPSS FIRST
0.42%
ahead of 35% of scored CVEs · Oct 14, 2026
Affects
Cisco
Cisco RoomOS Software and 1 more
CVSS base
7.5
High · 2 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation
None
none · proof-of-concept · active
Automatable
Yes
can an attacker script the kill-chain steps
Technical impact
Partial
partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

  1. Identify exposed assets running the affected vendor/product/version combinations (Cisco Cisco RoomOS Software, Cisco Cisco TelePresence Endpoint Software (TC/CE)).
  2. The attack is network-based and needs no privileges: restrict exposure (ACLs, VPN, WAF) until patched.
  3. No fix documented in the sources: reduce exposure and monitor the vendor advisory.
  4. Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

VendorProductVersionsStatusSource
Cisco Cisco RoomOS Software version RoomOS 11.20.3.0version RoomOS 11.9.3.1version RoomOS 11.5.3.3version RoomOS 10.3.2.0version RoomOS 11.9.2.4version RoomOS 11.14.3.0version RoomOS 11.17.2.2version RoomOS 11.14.4.0
and 43 more version RoomOS 10.19 StepUpgversion RoomOS 11.17.3.0version RoomOS 11.20.2.3version RoomOS 11.14.5.0version RoomOS 11.17.4.0version RoomOS 10.15.2.2version RoomOS 11.23.1.6version RoomOS 11.23.1.8version RoomOS 11.24.1.5version RoomOS 11.24.2.4version RoomOS 11.24.3.0version RoomOS 11.24.4.1version RoomOS 11.27.2.0version RoomOS 11.28.1.3version RoomOS 11.27.3.0version RoomOS 11.31.1.5version RoomOS 11.27.4.0version RoomOS 11.32.2.1version RoomOS 10.19.5.6version RoomOS 10.11.4.1version RoomOS 10.11.2.2version RoomOS 11.5.4.6version RoomOS 11.5.2.4version RoomOS 10.8.2.5version RoomOS 10.11.5.2version RoomOS 10.11.3.0version RoomOS 10.15.5.3version RoomOS 10.19.2.2version RoomOS 11.1.3.1version RoomOS 10.11.6.0version RoomOS 10.19.3.0version RoomOS 10.3.2.4version RoomOS 10.19.4.2version RoomOS 10.15.4.1version RoomOS 10.8.4.0version RoomOS 10.3.3.0version RoomOS 11.14.2.1version RoomOS 10.8.3.1version RoomOS 11.1.2.4version RoomOS 11.14.2.3version RoomOS 11.1.4.1version RoomOS 10.15.3.0version RoomOS 10.3.4.0
Vulnerable CVE Program (cve.org) e CISA ADP
Cisco Cisco TelePresence Endpoint Software (TC/CE) version CE9.5.1version CE9.10.1version CE9.1.2version CE9.1.1version CE9.9.4version CE9.2.1version CE9.1.3version CE9.0.1
and 27 more version CE9.1.6version CE9.2.2version CE9.4.0version CE9.10.0version CE9.2.3version CE9.12.3version CE9.15.18.4version CE9.15.3.14version CE9.15.18.6version CE9.3.1version CE9.3.0version CE9.10.2version CE9.2.6version CE9.5.0version CE9.3.3version CE9.1.4version CE9.3.2version CE9.4.2version CE9.2.4version CE9.2.5version CE9.9.3version CE9.5.3version CE9.10.3version CE9.1.5version CE9.5.2version CE9.4.1version CE9.6.1
Vulnerable CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

ScoreVersionSeverityExpl.ImpactScored by
7.5 CVSS 3.1 High 3.9 3.6 psirt@cisco.com via NIST National Vulnerability Database
7.5 CVSS 3.1 High — — cisco via CVE Program (cve.org) e CISA ADP
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H (score shown at the top: psirt@cisco.com)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-1287

Other CVEs with this weakness →

EPSS over time FIRST

Oct 13, 2026 → Oct 14, 2026 · 2 reading(s) · max 0.42%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

  • Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).
web/proxy/WAF logsnetwork IDS/IPS

Timeline

What happened to this CVE, newest first.

  • 2026
  • Affected products added · cisco/cisco roomos software, cisco/cisco telepresence endpoint software (tc/ce)
    Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
  • SSVC assessment updated
    Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
  • Record published
    Oct 13, 2026
  • CVSS changed · 7.5
    Oct 13, 2026 · NIST National Vulnerability Database
  • Source status changed · → Deferred
    Oct 13, 2026 · NIST National Vulnerability Database
  • Record created in this database
    Oct 13, 2026 · NIST National Vulnerability Database
  • CVE published
    Feb 4, 2026 · cisco

Source activity

Repeated readings are counted rather than listed.

  • 1× Official description updated · Oct 13, 2026 – Oct 13, 2026

References

1 on the record

Elsewhere on this site

Cisco
every CVE for this vendor
CWE-1287
other pages naming this weakness

Related CVEs (same products)

  • CVE-2025-20329 Cisco TelePresence Collaboration Endpoint and RoomOS Software Information Disclosure Vulnerability Oct 15, 2025

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

  • No fixed version, patch or mitigation documented.
  • No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
  • No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
  • No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-20119 is "Cisco TelePresence Collaboration Endpoint Software and RoomOS Software Denial of Service Vulnerability", rated High. It affects Cisco RoomOS Software (Cisco); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 7.5 describes technical severity. EPSS 0.42% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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