How severe is CVE-2015-6551?

CVE-2015-6551 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-2015-6551 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-6551?

CVE-2015-6551 primarily affects Veritas Netbackup Appliance. In total, 37 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-6551?

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

When was CVE-2015-6551 published?

CVE-2015-6551 was published on 2016-05-07 and last updated on 2026-06-17.

CVE-2015-6551

CVE-2015-6551 is a medium-severity vulnerability in Veritas Netbackup Appliance 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% (63rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Veritas Netbackup Appliance
Published: 2016-05-07
Last modified: 2026-06-17

Description

Veritas NetBackup 7.x through 7.5.0.7 and 7.6.0.x through 7.6.0.4 and NetBackup Appliance through 2.5.4 and 2.6.0.x through 2.6.0.4 do not use TLS for administration-console traffic to the NBU server, which allows remote attackers to obtain sensitive information by sniffing the network for key-exchange packets.

Frequently asked questions

What is CVE-2015-6551?: Veritas NetBackup 7.x through 7.5.0.7 and 7.6.0.x through 7.6.0.4 and NetBackup Appliance through 2.5.4 and 2.6.0.x through 2.6.0.4 do not use TLS for administration-console traffic to the NBU server, which allows remote attackers to obtain sensitive information by sniffing the network for key-exchange packets.
How severe is CVE-2015-6551?: CVE-2015-6551 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-2015-6551 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-6551?: CVE-2015-6551 primarily affects Veritas Netbackup Appliance. In total, 37 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2015-6551?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2015-6551 published?: CVE-2015-6551 was published on 2016-05-07 and last updated on 2026-06-17.

References

Affected products (37)

cpe:2.3:a:veritas:netbackup_appliance:1.1.0.1:*:*:*:*:*:*:*
cpe:2.3:a:veritas:netbackup_appliance:1.1.0.2:*:*:*:*:*:*:*
cpe:2.3:a:veritas:netbackup_appliance:1.2:*:*:*:*:*:*:*
cpe:2.3:a:veritas:netbackup_appliance:2.0:*:*:*:*:*:*:*
cpe:2.3:a:veritas:netbackup_appliance:2.0.1:*:*:*:*:*:*:*
cpe:2.3:a:veritas:netbackup_appliance:2.0.2:*:*:*:*:*:*:*
cpe:2.3:a:veritas:netbackup_appliance:2.0.3:*:*:*:*:*:*:*
cpe:2.3:a:veritas:netbackup_appliance:2.5:*:*:*:*:*:*:*
cpe:2.3:a:veritas:netbackup_appliance:2.5.1:*:*:*:*:*:*:*
cpe:2.3:a:veritas:netbackup_appliance:2.5.2:*:*:*:*:*:*:*
cpe:2.3:a:veritas:netbackup_appliance:2.5.3:*:*:*:*:*:*:*
cpe:2.3:a:veritas:netbackup_appliance:2.6:*:*:*:*:*:*:*
cpe:2.3:a:veritas:netbackup_appliance:2.6.0.2:*:*:*:*:*:*:*
cpe:2.3:a:veritas:netbackup_appliance:2.6.0.3:*:*:*:*:*:*:*
cpe:2.3:a:veritas:netbackup_appliance:2.6.0.4:*:*:*:*:*:*:*
cpe:2.3:a:veritas:netbackup_appliance:2.6.1:*:*:*:*:*:*:*
cpe:2.3:a:veritas:netbackup_appliance:2.6.1.1:*:*:*:*:*:*:*
cpe:2.3:a:veritas:netbackup_appliance:2.6.1.2:*:*:*:*:*:*:*
cpe:2.3:a:veritas:netbackup_appliance:2.7.1:*:*:*:*:*:*:*
cpe:2.3:a:veritas:netbackup:7.0:*:*:*:*:*:*:*
cpe:2.3:a:veritas:netbackup:7.0.1:*:*:*:*:*:*:*
cpe:2.3:a:veritas:netbackup:7.1.0.1:*:*:*:*:*:*:*
cpe:2.3:a:veritas:netbackup:7.1.0.2:*:*:*:*:*:*:*
cpe:2.3:a:veritas:netbackup:7.1.0.3:*:*:*:*:*:*:*
cpe:2.3:a:veritas:netbackup:7.1.0.4:*:*:*:*:*:*:*
cpe:2.3:a:veritas:netbackup:7.5.0.1:*:*:*:*:*:*:*
cpe:2.3:a:veritas:netbackup:7.5.0.3:*:*:*:*:*:*:*
cpe:2.3:a:veritas:netbackup:7.5.0.4:*:*:*:*:*:*:*
cpe:2.3:a:veritas:netbackup:7.5.0.5:*:*:*:*:*:*:*
cpe:2.3:a:veritas:netbackup:7.5.0.6:*:*:*:*:*:*:*
cpe:2.3:a:veritas:netbackup:7.5.0.7:*:*:*:*:*:*:*
cpe:2.3:a:veritas:netbackup:7.6.0.2:*:*:*:*:*:*:*
cpe:2.3:a:veritas:netbackup:7.6.0.3:*:*:*:*:*:*:*
cpe:2.3:a:veritas:netbackup:7.6.0.4:*:*:*:*:*:*:*
cpe:2.3:a:veritas:netbackup:7.6.1.1:*:*:*:*:*:*:*
cpe:2.3:a:veritas:netbackup:7.6.1.2:*:*:*:*:*:*:*
cpe:2.3:a:veritas:netbackup:7.7.1:*:*:*:*:*:*:*

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