How severe is CVE-2015-8251?

CVE-2015-8251 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2015-8251 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-8251?

CVE-2015-8251 primarily affects Unify Openstage 60 Firmware. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-8251?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2015-8251 published?

CVE-2015-8251 was published on 2017-09-25 and last updated on 2026-06-17.

CVE-2015-8251

CVE-2015-8251 is a medium-severity vulnerability in Unify Openstage 60 Firmware with a CVSS 3.x base score of 5.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-200.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
CVSS v2: 4.3
EPSS exploit prediction: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Unify Openstage 60 Firmware
Published: 2017-09-25
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2015-8251?: 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.
How severe is CVE-2015-8251?: CVE-2015-8251 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2015-8251 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-8251?: CVE-2015-8251 primarily affects Unify Openstage 60 Firmware. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2015-8251?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2015-8251 published?: CVE-2015-8251 was published on 2017-09-25 and last updated on 2026-06-17.

References

Affected products (10)

cpe:2.3:o:unify:openstage_60_firmware:3.0:*:*:*:*:*:*:*
cpe:2.3:o:unify:openscape_desk_phone_ip_55g_sip_firmware:3.0:*:*:*:*:*:*:*
cpe:2.3:o:unify:openstage_15_firmware:3.0:*:*:*:*:*:*:*
cpe:2.3:o:unify:openstage_20e_firmware:3.0:*:*:*:*:*:*:*
cpe:2.3:o:unify:openstage_20_firmware:3.0:*:*:*:*:*:*:*
cpe:2.3:o:unify:openstage_40_firmware:3.0:*:*:*:*:*:*:*
cpe:2.3:o:unify:openscape_desk_phone_ip_35g_sip_firmware:3.0:*:*:*:*:*:*:*
cpe:2.3:o:unify:openscape_desk_phone_ip_35g_eco_sip_firmware:3.0:*:*:*:*:*:*:*
cpe:2.3:o:unify:openscape_desk_phone_ip_55g_hfa_firmware:3.0:*:*:*:*:*:*:*
cpe:2.3:o:unify:openscape_desk_phone_ip_35g_hfa_firmware:3.0:*:*:*:*:*:*:*

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