HOMEVULNERABILITIESCVE-2015-8251
MEDIUM

CVE-2015-8251

CWE-200Published: September 25, 2017· Updated: Jun 17, 2026

5.9
CVSS v3.1

Official Description

OpenStage 60 and OpenScape Desk Phone IP 55G SIP V3, OpenStage 15, 20E, 20 and 40 and OpenScape Desk Phone IP 35G SIP V3, OpenScape Desk Phone IP 35G Eco SIP V3, OpenStage 60 and OpenScape Desk Phone IP 55G HFA V3, OpenStage 15, 20E, 20, and 40 and OpenScape Desk Phone IP 35G HFA V3, and OpenScape Desk Phone IP 35G Eco HFA V3 use non-unique X.509 certificates and SSH host keys.

NVD Source

Technical Analysis

CVE-2015-8251 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 5.9.

From a weakness classification perspective (CWE-200): Information exposure vulnerabilities leak sensitive data to unauthorized actors.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityHigh
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected Vendors & Products

unify21 product(s)
openstage 60 firmwareopenstage 60openscape desk phone ip 55g sip firmwareopenscape desk phone ip 55g sipopenstage 15 firmwareopenstage 15openstage 20e firmwareopenstage 20eopenstage 20 firmwareopenstage 20openstage 40 firmwareopenstage 40+9
Source: NVD CPE · 21 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

ADVISORYhttp://www.kb.cert.org/vuls/id/566724
ADVISORYhttps://networks.unify.com/security/advisories/OBSO-1511-02-A.pdf
ADVISORYhttps://networks.unify.com/security/advisories/OBSO-1511-02.pdf
ADVISORYhttps://www.kb.cert.org/vuls/id/BLUU-A2PPZE
ADVISORYhttp://www.kb.cert.org/vuls/id/566724
ADVISORYhttps://networks.unify.com/security/advisories/OBSO-1511-02-A.pdf
ADVISORYhttps://networks.unify.com/security/advisories/OBSO-1511-02.pdf
ADVISORYhttps://www.kb.cert.org/vuls/id/BLUU-A2PPZE

All References (8)

→
http://www.kb.cert.org/vuls/id/566724Third Party Advisory · US Government Resource
→
https://networks.unify.com/security/advisories/OBSO-1511-02-A.pdfVendor Advisory
→
https://networks.unify.com/security/advisories/OBSO-1511-02.pdfVendor Advisory
→
https://www.kb.cert.org/vuls/id/BLUU-A2PPZEThird Party Advisory · US Government Resource
→
http://www.kb.cert.org/vuls/id/566724Third Party Advisory · US Government Resource
→
https://networks.unify.com/security/advisories/OBSO-1511-02-A.pdfVendor Advisory
→
https://networks.unify.com/security/advisories/OBSO-1511-02.pdfVendor Advisory
→
https://www.kb.cert.org/vuls/id/BLUU-A2PPZEThird Party Advisory · US Government Resource

Quick Facts

CVE IDCVE-2015-8251
CVSS Score5.9 / 10
SeverityMEDIUM
WeaknessCWE-200
CISA KEVNo
Affected1 vendor(s)
PublishedSep 25, 2017

Related CVEs (CWE-200)

CVE-2008-0082
10.0
CVE-2008-3010
10.0
CVE-2008-1252
10.0
CVE-2008-1155
10.0
CVE-2008-3914
10.0
CVE-2010-1230
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2015-8251 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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