CVE-2016-6445

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Summary

CVECVE-2016-6445
StatePUBLISHED
Assignercisco
Source PriorityCVE Program / NVD first with legacy fallback
Published2016-10-27 21:59:17 UTC
Updated2026-05-06 22:30:45 UTC
DescriptionA vulnerability in the Extensible Messaging and Presence Protocol (XMPP) service of the Cisco Meeting Server (CMS) before 2.0.6 and Acano Server before 1.8.18 and 1.9.x before 1.9.6 could allow an unauthenticated, remote attacker to masquerade as a legitimate user. This vulnerability is due to the XMPP service incorrectly processing a deprecated authentication scheme. A successful exploit could allow an attacker to access the system as another user.

Risk And Classification

Primary CVSS: v3.0 9.1 CRITICAL from [email protected]

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS: 0.007700000 probability, percentile 0.736400000 (date 2026-05-09)

Problem Types: CWE-20 | unspecified

VersionSourceTypeScoreSeverityVector
3.0[email protected]Primary9.1CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
2.0[email protected]Primary6.4AV:N/AC:L/Au:N/C:P/I:P/A:N

CVSS v3.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
None

AV:N/AC:L/Au:N/C:P/I:P/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Cisco Meeting Server 1.8.15 All All All
Application Cisco Meeting Server 1.8_base All All All
Application Cisco Meeting Server 1.9.0 All All All
Application Cisco Meeting Server 1.9.2 All All All
Application Cisco Meeting Server 2.0.0 All All All
Application Cisco Meeting Server 2.0.1 All All All
Application Cisco Meeting Server 2.0.3 All All All
Application Cisco Meeting Server 2.0.4 All All All
Application Cisco Meeting Server 2.0.5 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na Cisco Meeting Server CMS Before 2.0.6 And Acano Server Before 1.8.18 And 1.9.x Before 1.9.6 affected Cisco Meeting Server (CMS) before 2.0.6 and Acano Server before 1.8.18 and 1.9.x before 1.9.6 Not specified

References

ReferenceSourceLinkTags
Cisco Meeting Server XMPP Authentication Flaw Lets Remote Users Bypass Authentication on the Target System - SecurityTracker af854a3a-2127-422b-91ae-364da2661108 www.securitytracker.com
Cisco Meeting Server CVE-2016-6445 Authentication Bypass Vulnerability af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com
Cisco Meeting Server Client Authentication Bypass Vulnerability af854a3a-2127-422b-91ae-364da2661108 tools.cisco.com Mitigation, Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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