# CVE-2021-26989: Denial of service in Clustered Data ONTAP

> Remote authenticated attackers can cause a Denial of Service on NetApp Clustered Data ONTAP systems configured for SMB access.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 4 Mar 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-g5xj-292f-45cf

## What is CVE-2021-26989?

CVE-2021-26989 is a medium-severity denial of service vulnerability in Clustered Data ONTAP, published on 4 Mar 2021. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

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.

## Which versions are affected by CVE-2021-26989?

It affects 1 product.


Products: Netapp Data Ontap.

## How do I fix CVE-2021-26989?

No fix has been published for CVE-2021-26989 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-26989 being exploited?

There is no known exploitation of CVE-2021-26989 in the wild and no public exploit code.

## Other vulnerabilities in Clustered Data ONTAP

- [CVE-2008-3349](https://insights.sbomify.com/CVE-2008-3349/): Auth bypass in n/a (critical 10.0)
- [CVE-2015-7746](https://insights.sbomify.com/CVE-2015-7746/): Auth bypass in n/a (critical 9.8)
- [CVE-2019-5502](https://insights.sbomify.com/CVE-2019-5502/): Weak cryptography in Data ONTAP operating in 7-Mode (critical 9.1)
- [CVE-2016-5374](https://insights.sbomify.com/CVE-2016-5374/): Missing authorization in n/a (high 8.8)
- [CVE-2015-8322](https://insights.sbomify.com/CVE-2015-8322/): Code injection in n/a (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-26989 and fix it if it is affected.

What it is: CVE-2021-26989 is a medium-severity denial of service vulnerability in Clustered Data ONTAP, published on 4 Mar 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-26989 in the wild and no public exploit code.

Affected product: Clustered Data ONTAP. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2021-26989/ (Markdown: https://insights.sbomify.com/CVE-2021-26989/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-26989
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-26989
- OSV: https://osv.dev/vulnerability/CVE-2021-26989

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-26989/
Summaries are generated and may contain mistakes; the official description above is the record.