How severe is CVE-2017-9978?

CVE-2017-9978 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2017-9978 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-9978?

CVE-2017-9978 affects Osnexus Quantastor. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-9978?

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

When was CVE-2017-9978 published?

CVE-2017-9978 was published on 2017-08-28 and last updated on 2026-06-17.

CVE-2017-9978

CVE-2017-9978 is a medium-severity vulnerability in Osnexus Quantastor with a CVSS 3.x base score of 5.3. 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 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 5% (91st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Osnexus Quantastor
Published: 2017-08-28
Last modified: 2026-06-17

Description

On the OSNEXUS QuantaStor v4 virtual appliance before 4.3.1, a flaw was found with the error message sent as a response for users that don't exist on the system. An attacker could leverage this information to fine-tune and enumerate valid accounts on the system by searching for common usernames.

Frequently asked questions

What is CVE-2017-9978?: On the OSNEXUS QuantaStor v4 virtual appliance before 4.3.1, a flaw was found with the error message sent as a response for users that don't exist on the system. An attacker could leverage this information to fine-tune and enumerate valid accounts on the system by searching for common usernames.
How severe is CVE-2017-9978?: CVE-2017-9978 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2017-9978 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-9978?: CVE-2017-9978 affects Osnexus Quantastor. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-9978?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2017-9978 published?: CVE-2017-9978 was published on 2017-08-28 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:osnexus:quantastor:*:*:*:*:*:*:*:*

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