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CVE-2017-9978

28
FAUCET Score

CVE-2017-9978 is an information disclosure vulnerability affecting OSNEXUS QuantaStor virtual appliances prior to version 4.3.1. The flaw allows an unauthenticated attacker to enumerate valid user accounts by analyzing error messages returned for non-existent users. With a CVSS score of 5.3 (Medium), this vulnerability has a low attack complexity and does not require user interaction, but its impact is limited to information disclosure (CWE-200). While not actively exploited in the wild and lacking Metasploit or Nuclei modules, a proof-of-concept exploit is available on ExploitDB, though it has received minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.3.0CPE matchmatch criteria
cpe:2.3:a:osnexus:quantastor:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.3MEDIUM

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.0

Exploit Intelligence

EPSS Score
4.75%
Probability of exploitation in next 30 days
EPSS Percentile
90.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
ExploitDB: EDB-42517 · Aug 18, 2017
This CVE's current EPSS score of 0.0475 is in the 88th percentile among its peer group of 23,690 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

packetstormsecurity.com / files/143780/OSNEXUS-QuantaStor-4-Information-Disclosure.html
ExploitThird Party AdvisoryVDB Entry
seclists.org / fulldisclosure/2017/Aug/23
ExploitMailing ListThird Party Advisory
exploit-db.com / exploits/42517
ExploitThird Party AdvisoryVDB Entry
vvvsecurity.com / advisories/vvvsecurity-advisory-2017-6943.txt
ExploitThird Party AdvisoryURL Repurposed