# CVE-2020-26077: Cisco IoT Field Network Director Improper Access Control Vulnerability

> An authenticated attacker can view user lists from different domains by manipulating API requests, exposing sensitive user data.

- **Severity:** Medium 5.0 (`CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N`)
- **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:** 18 Nov 2020
- **Updated:** 13 Nov 2024
- **Also known as:** GHSA-7q2r-9q4w-229g

## What is CVE-2020-26077?

CVE-2020-26077 is a medium-severity missing authorization vulnerability in Cisco IoT Field Network Director (IoT-FND), published on 18 Nov 2020. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability in the access control functionality of Cisco IoT Field Network Director (FND) could allow an authenticated, remote attacker to view lists of users from different domains that are configured on an affected system. The vulnerability is due to improper access control. An attacker could exploit this vulnerability by sending an API request that alters the domain for a requested user list on an affected system. A successful exploit could allow the attacker to view lists of users from different domains on the affected system.

Weakness: CWE-269 (Improper Privilege Management), CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2020-26077?

It affects 1 product.


Products: Cisco Iot Field Network Director.

## How do I fix CVE-2020-26077?

No fix has been published for CVE-2020-26077 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-26077 being exploited?

There is no known exploitation of CVE-2020-26077 in the wild and no public exploit code.

## Other vulnerabilities in Cisco IoT Field Network Director (IoT-FND)

- [CVE-2020-3531](https://insights.sbomify.com/CVE-2020-3531/): Cisco IoT Field Network Director Unauthenticated REST API Vulnerability (critical 9.8)
- [CVE-2018-0270](https://insights.sbomify.com/CVE-2018-0270/): Cross-site request forgery in Cisco IoT Field Network Director (high 8.8)
- [CVE-2020-26072](https://insights.sbomify.com/CVE-2020-26072/): Cisco IoT Field Network Director SOAP API Authorization Bypass Vulnerability (high 8.7)
- [CVE-2026-20167](https://insights.sbomify.com/CVE-2026-20167/): Cisco IoT Field Network Director Remote Device Denial of Service Vulnerability (high 7.7)
- [CVE-2020-3392](https://insights.sbomify.com/CVE-2020-3392/): Cisco IoT Field Network Director Missing API Authentication Vulnerability (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-26077 and fix it if it is affected.

What it is: CVE-2020-26077 is a medium-severity missing authorization vulnerability in Cisco IoT Field Network Director (IoT-FND), published on 18 Nov 2020. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-26077 in the wild and no public exploit code.

Affected product: Cisco IoT Field Network Director (IoT-FND). 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-2020-26077/ (Markdown: https://insights.sbomify.com/CVE-2020-26077/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-26077
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-26077
- OSV: https://osv.dev/vulnerability/CVE-2020-26077

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From sbomify Insights: https://insights.sbomify.com/CVE-2020-26077/
Summaries are generated and may contain mistakes; the official description above is the record.