How severe is CVE-2015-8960?

CVE-2015-8960 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2015-8960 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-8960?

CVE-2015-8960 primarily affects Ietf Transport Layer Security. In total, 15 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-8960?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2015-8960 published?

CVE-2015-8960 was published on 2016-09-21 and last updated on 2026-06-17.

CVE-2015-8960

CVE-2015-8960 is a high-severity vulnerability in Ietf Transport Layer Security with a CVSS 3.x base score of 8.1. 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-295.

Key facts

Severity: High (CVSS 3.x base score 8.1)
CVSS v2: 6.8
EPSS exploit prediction: 2% (78th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-295
Affected product: Ietf Transport Layer Security
Published: 2016-09-21
Last modified: 2026-06-17

Description

The TLS protocol 1.2 and earlier supports the rsa_fixed_dh, dss_fixed_dh, rsa_fixed_ecdh, and ecdsa_fixed_ecdh values for ClientCertificateType but does not directly document the ability to compute the master secret in certain situations with a client secret key and server public key but not a server secret key, which makes it easier for man-in-the-middle attackers to spoof TLS servers by leveraging knowledge of the secret key for an arbitrary installed client X.509 certificate, aka the "Key Compromise Impersonation (KCI)" issue.

Frequently asked questions

What is CVE-2015-8960?: The TLS protocol 1.2 and earlier supports the rsa_fixed_dh, dss_fixed_dh, rsa_fixed_ecdh, and ecdsa_fixed_ecdh values for ClientCertificateType but does not directly document the ability to compute the master secret in certain situations with a client secret key and server public key but not a server secret key, which makes it easier for man-in-the-middle attackers to spoof TLS servers by leveraging knowledge of the secret key for an arbitrary installed client X.509 certificate, aka the "Key Compromise Impersonation (KCI)" issue.
How severe is CVE-2015-8960?: CVE-2015-8960 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2015-8960 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-8960?: CVE-2015-8960 primarily affects Ietf Transport Layer Security. In total, 15 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2015-8960?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2015-8960 published?: CVE-2015-8960 was published on 2016-09-21 and last updated on 2026-06-17.

References

Affected products (15)

cpe:2.3:a:ietf:transport_layer_security:*:*:*:*:*:*:*:*
cpe:2.3:a:netapp:clustered_data_ontap_antivirus_connector:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:data_ontap_edge:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:host_agent:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:oncommand_shift:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:plug-in_for_symantec_netbackup:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:smi-s_provider:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:snap_creator_framework:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:snapdrive:-:*:*:*:*:unix:*:*
cpe:2.3:a:netapp:snapdrive:-:*:*:*:*:windows:*:*
cpe:2.3:a:netapp:snapmanager:-:*:*:*:*:oracle:*:*
cpe:2.3:a:netapp:snapmanager:-:*:*:*:*:sap:*:*
cpe:2.3:a:netapp:snapprotect:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:solidfire_\&_hci_management_node:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:system_setup:-:*:*:*:*:*:*:*

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