# CVE-2021-1474: Cisco Umbrella Link and CSV Formula Injection Vulnerabilities

> Authenticated attackers can inject malicious formulas or links into Cisco Umbrella audit logs and reports, potentially leading to code execution or security bypass.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 8 Apr 2021
- **Updated:** 8 Nov 2024
- **Also known as:** GHSA-382q-3qj5-29mx

## What is CVE-2021-1474?

CVE-2021-1474 is a medium-severity vulnerability in Cisco Umbrella Insights Virtual Appliance, published on 8 Apr 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

Multiple vulnerabilities in the Admin audit log export feature and Scheduled Reports feature of Cisco Umbrella could allow an authenticated, remote attacker to perform formula and link injection attacks on an affected device. For more information about these vulnerabilities, see the Details section of this advisory.

Weakness: CWE-1236 (Improper Neutralization of Formula Elements in a CSV File)

## Which versions are affected by CVE-2021-1474?

It affects 1 product.


Products: Cisco Umbrella.

## How do I fix CVE-2021-1474?

No fix has been published for CVE-2021-1474 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-1474 being exploited?

There is no known exploitation of CVE-2021-1474 in the wild and no public exploit code.

## Other vulnerabilities in Cisco Umbrella Insights Virtual Appliance

- [CVE-2018-0435](https://insights.sbomify.com/CVE-2018-0435/): Cisco Umbrella API Unauthorized Access Vulnerability (critical 9.1)
- [CVE-2019-1807](https://insights.sbomify.com/CVE-2019-1807/): Cisco Umbrella Dashboard Session Management Vulnerability (high 7.6)
- [CVE-2021-1475](https://insights.sbomify.com/CVE-2021-1475/): Cisco Umbrella Link and CSV Formula Injection Vulnerabilities (medium 6.5)
- [CVE-2019-1792](https://insights.sbomify.com/CVE-2019-1792/): Cisco Umbrella Cross-Site Scripting Vulnerability (medium 6.1)
- [CVE-2021-1350](https://insights.sbomify.com/CVE-2021-1350/): Cisco Umbrella Dashboard Packet Flood Vulnerability (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-1474 and fix it if it is affected.

What it is: CVE-2021-1474 is a medium-severity vulnerability in Cisco Umbrella Insights Virtual Appliance, published on 8 Apr 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-1474 in the wild and no public exploit code.

Affected product: Cisco Umbrella Insights Virtual Appliance. 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-2021-1474/ (Markdown: https://insights.sbomify.com/CVE-2021-1474/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-1474
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-1474
- OSV: https://osv.dev/vulnerability/CVE-2021-1474

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-1474/
Summaries are generated and may contain mistakes; the official description above is the record.