HOMEVULNERABILITIESCVE-2019-19866
HIGH

CVE-2019-19866

CWE-639Published: February 21, 2020· Updated: Jun 17, 2026

7.5
CVSS v3.1

Official Description

Atos Unify OpenScape UC Web Client V9 before version V9 R4.31.0 and V10 before version V10 R0.6.0 allows remote attackers to obtain sensitive information. By iterating the value of conferenceId to getMailFunction in the JSON API, one can enumerate all conferences scheduled on the platform, with their numbers and access PINs.

NVD Source

Technical Analysis

CVE-2019-19866 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected Vendors & Products

atos1 product(s)
unify openscape uc web client
Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://networks.unify.com/security/advisories/OBSO-2002-01.pdf
ADVISORYhttps://unify.com/en/support/security-advisories
ADVISORYhttps://networks.unify.com/security/advisories/OBSO-2002-01.pdf
ADVISORYhttps://unify.com/en/support/security-advisories

All References (4)

→
https://networks.unify.com/security/advisories/OBSO-2002-01.pdfVendor Advisory
→
https://unify.com/en/support/security-advisoriesVendor Advisory
→
https://networks.unify.com/security/advisories/OBSO-2002-01.pdfVendor Advisory
→
https://unify.com/en/support/security-advisoriesVendor Advisory

Quick Facts

CVE IDCVE-2019-19866
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-639
CISA KEVNo
Affected1 vendor(s)
PublishedFeb 21, 2020

Related CVEs (CWE-639)

CVE-2024-45032
10.0
CVE-2026-34037
9.9
CVE-2026-45552
9.9
CVE-2026-55255
KEV9.9
CVE-2026-29200
9.9
CVE-2026-54052
9.9

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2019-19866 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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