# CVE-2026-20107: Cisco Application Policy Infrastructure Controller Denial of Service Vulnerability

> An authenticated local attacker can cause a Cisco APIC device to reload unexpectedly via crafted CLI commands, resulting in a denial of service.

- **Severity:** Medium 5.5 (`CVSS:3.1/AV:L/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:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 25 Feb 2026
- **Updated:** 25 Feb 2026
- **Also known as:** GHSA-gv9w-2wpq-7538

## What is CVE-2026-20107?

CVE-2026-20107 is a medium-severity denial of service vulnerability in Cisco Application Policy Infrastructure Controller (APIC), published on 25 Feb 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A vulnerability in the Object Model CLI component of Cisco Application Policy Infrastructure Controller (APIC) could allow an authenticated, local attacker to cause an affected device to reload unexpectedly, resulting in a denial of service (DoS) condition. To exploit this vulnerability, the attacker must have valid user credentials and any role that includes CLI access.

This vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by issuing crafted commands at the CLI prompt. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.

Weakness: CWE-1220 (Insufficient Granularity of Access Control)

## Which versions are affected by CVE-2026-20107?


## How do I fix CVE-2026-20107?

No fix has been published for CVE-2026-20107 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-20107 being exploited?

There is no known exploitation of CVE-2026-20107 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-20107 and fix it if it is affected.

What it is: CVE-2026-20107 is a medium-severity denial of service vulnerability in Cisco Application Policy Infrastructure Controller (APIC), published on 25 Feb 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-20107 in the wild and no public exploit code.

Affected product: Cisco Application Policy Infrastructure Controller (APIC). 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-2026-20107/ (Markdown: https://insights.sbomify.com/CVE-2026-20107/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-20107
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-20107
- OSV: https://osv.dev/vulnerability/CVE-2026-20107

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-20107/
Summaries are generated and may contain mistakes; the official description above is the record.