CVE-2021-26989

Clustered Data ONTAP versions prior to 9.3P21, 9.5P16, 9.6P12, 9.7P9 and 9.8 are susceptible to a vulnerability which could allow a remote authenticated attacker to cause a Denial of Service (DoS) on clustered Data ONTAP configured for SMB access.

Published: 2021-03-04 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-26989 is rated Moderate Risk (48.4/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.15%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-26989

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.61% 1.15% +0.54%
2 2026-03-03 0.80% 0.61% -0.18%
3 2025-11-21 — 0.80% —

Full EPSS history (13 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-26989

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 3.6 [email protected]
3.5 2.0 LOW
AV:N/AC:M/Au:S/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 6.8 2.9 [email protected]

Weakness enumeration for CVE-2021-26989

Affected software / configurations for CVE-2021-26989

Vendor Product Version Raw CPE
netapp data_ontap 9.3.0 cpe:2.3:o:netapp:data_ontap:9.3.0:-:*:*:*:*:*:*
netapp data_ontap 9.3.0 cpe:2.3:o:netapp:data_ontap:9.3.0:p1:*:*:*:*:*:*
netapp data_ontap 9.3.0 cpe:2.3:o:netapp:data_ontap:9.3.0:p10:*:*:*:*:*:*
netapp data_ontap 9.3.0 cpe:2.3:o:netapp:data_ontap:9.3.0:p11:*:*:*:*:*:*
netapp data_ontap 9.3.0 cpe:2.3:o:netapp:data_ontap:9.3.0:p12:*:*:*:*:*:*
netapp data_ontap 9.3.0 cpe:2.3:o:netapp:data_ontap:9.3.0:p13:*:*:*:*:*:*
netapp data_ontap 9.3.0 cpe:2.3:o:netapp:data_ontap:9.3.0:p14:*:*:*:*:*:*
netapp data_ontap 9.3.0 cpe:2.3:o:netapp:data_ontap:9.3.0:p15:*:*:*:*:*:*
netapp data_ontap 9.3.0 cpe:2.3:o:netapp:data_ontap:9.3.0:p16:*:*:*:*:*:*
netapp data_ontap 9.3.0 cpe:2.3:o:netapp:data_ontap:9.3.0:p17:*:*:*:*:*:*
netapp data_ontap 9.3.0 cpe:2.3:o:netapp:data_ontap:9.3.0:p18:*:*:*:*:*:*
netapp data_ontap 9.3.0 cpe:2.3:o:netapp:data_ontap:9.3.0:p19:*:*:*:*:*:*
netapp data_ontap 9.3.0 cpe:2.3:o:netapp:data_ontap:9.3.0:p2:*:*:*:*:*:*
netapp data_ontap 9.3.0 cpe:2.3:o:netapp:data_ontap:9.3.0:p20:*:*:*:*:*:*
netapp data_ontap 9.3.0 cpe:2.3:o:netapp:data_ontap:9.3.0:p3:*:*:*:*:*:*
netapp data_ontap 9.3.0 cpe:2.3:o:netapp:data_ontap:9.3.0:p4:*:*:*:*:*:*
netapp data_ontap 9.3.0 cpe:2.3:o:netapp:data_ontap:9.3.0:p5:*:*:*:*:*:*
netapp data_ontap 9.3.0 cpe:2.3:o:netapp:data_ontap:9.3.0:p6:*:*:*:*:*:*
netapp data_ontap 9.3.0 cpe:2.3:o:netapp:data_ontap:9.3.0:p7:*:*:*:*:*:*
netapp data_ontap 9.3.0 cpe:2.3:o:netapp:data_ontap:9.3.0:p8:*:*:*:*:*:*
netapp data_ontap 9.3.0 cpe:2.3:o:netapp:data_ontap:9.3.0:p9:*:*:*:*:*:*
netapp data_ontap 9.5.0 cpe:2.3:o:netapp:data_ontap:9.5.0:-:*:*:*:*:*:*
netapp data_ontap 9.5.0 cpe:2.3:o:netapp:data_ontap:9.5.0:p1:*:*:*:*:*:*
netapp data_ontap 9.5.0 cpe:2.3:o:netapp:data_ontap:9.5.0:p10:*:*:*:*:*:*
netapp data_ontap 9.5.0 cpe:2.3:o:netapp:data_ontap:9.5.0:p11:*:*:*:*:*:*
netapp data_ontap 9.5.0 cpe:2.3:o:netapp:data_ontap:9.5.0:p12:*:*:*:*:*:*
netapp data_ontap 9.5.0 cpe:2.3:o:netapp:data_ontap:9.5.0:p13:*:*:*:*:*:*
netapp data_ontap 9.5.0 cpe:2.3:o:netapp:data_ontap:9.5.0:p14:*:*:*:*:*:*
netapp data_ontap 9.5.0 cpe:2.3:o:netapp:data_ontap:9.5.0:p15:*:*:*:*:*:*
netapp data_ontap 9.5.0 cpe:2.3:o:netapp:data_ontap:9.5.0:p2:*:*:*:*:*:*
netapp data_ontap 9.5.0 cpe:2.3:o:netapp:data_ontap:9.5.0:p3:*:*:*:*:*:*
netapp data_ontap 9.5.0 cpe:2.3:o:netapp:data_ontap:9.5.0:p4:*:*:*:*:*:*
netapp data_ontap 9.5.0 cpe:2.3:o:netapp:data_ontap:9.5.0:p5:*:*:*:*:*:*
netapp data_ontap 9.5.0 cpe:2.3:o:netapp:data_ontap:9.5.0:p6:*:*:*:*:*:*
netapp data_ontap 9.5.0 cpe:2.3:o:netapp:data_ontap:9.5.0:p7:*:*:*:*:*:*
netapp data_ontap 9.5.0 cpe:2.3:o:netapp:data_ontap:9.5.0:p8:*:*:*:*:*:*
netapp data_ontap 9.5.0 cpe:2.3:o:netapp:data_ontap:9.5.0:p9:*:*:*:*:*:*
netapp data_ontap 9.6.0 cpe:2.3:o:netapp:data_ontap:9.6.0:-:*:*:*:*:*:*
netapp data_ontap 9.6.0 cpe:2.3:o:netapp:data_ontap:9.6.0:p1:*:*:*:*:*:*
netapp data_ontap 9.6.0 cpe:2.3:o:netapp:data_ontap:9.6.0:p10:*:*:*:*:*:*
netapp data_ontap 9.6.0 cpe:2.3:o:netapp:data_ontap:9.6.0:p11:*:*:*:*:*:*
netapp data_ontap 9.6.0 cpe:2.3:o:netapp:data_ontap:9.6.0:p2:*:*:*:*:*:*
netapp data_ontap 9.6.0 cpe:2.3:o:netapp:data_ontap:9.6.0:p3:*:*:*:*:*:*
netapp data_ontap 9.6.0 cpe:2.3:o:netapp:data_ontap:9.6.0:p4:*:*:*:*:*:*
netapp data_ontap 9.6.0 cpe:2.3:o:netapp:data_ontap:9.6.0:p5:*:*:*:*:*:*
netapp data_ontap 9.6.0 cpe:2.3:o:netapp:data_ontap:9.6.0:p6:*:*:*:*:*:*
netapp data_ontap 9.6.0 cpe:2.3:o:netapp:data_ontap:9.6.0:p7:*:*:*:*:*:*
netapp data_ontap 9.6.0 cpe:2.3:o:netapp:data_ontap:9.6.0:p8:*:*:*:*:*:*
netapp data_ontap 9.6.0 cpe:2.3:o:netapp:data_ontap:9.6.0:p9:*:*:*:*:*:*
netapp data_ontap 9.7.0 cpe:2.3:o:netapp:data_ontap:9.7.0:-:*:*:*:*:*:*
netapp data_ontap 9.7.0 cpe:2.3:o:netapp:data_ontap:9.7.0:p1:*:*:*:*:*:*
netapp data_ontap 9.7.0 cpe:2.3:o:netapp:data_ontap:9.7.0:p2:*:*:*:*:*:*
netapp data_ontap 9.7.0 cpe:2.3:o:netapp:data_ontap:9.7.0:p3:*:*:*:*:*:*
netapp data_ontap 9.7.0 cpe:2.3:o:netapp:data_ontap:9.7.0:p4:*:*:*:*:*:*
netapp data_ontap 9.7.0 cpe:2.3:o:netapp:data_ontap:9.7.0:p5:*:*:*:*:*:*
netapp data_ontap 9.7.0 cpe:2.3:o:netapp:data_ontap:9.7.0:p6:*:*:*:*:*:*
netapp data_ontap 9.7.0 cpe:2.3:o:netapp:data_ontap:9.7.0:p7:*:*:*:*:*:*
netapp data_ontap 9.8.0 cpe:2.3:o:netapp:data_ontap:9.8.0:-:*:*:*:*:*:*

References for CVE-2021-26989

cvelogic Threat Intelligence