# CVE-2016-6367: Cisco Adaptive Security Appliance (ASA) CLI Remote Code Execution

> Local attackers can gain elevated privileges on Cisco ASA devices by submitting invalid CLI commands, potentially leading to full system compromise.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Yes, since 24 May 2022 (CISA KEV)
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 18 Aug 2016
- **Updated:** 12 Jan 2026
- **Also known as:** GHSA-cxx8-9qq9-rm4x

## What is CVE-2016-6367?

CVE-2016-6367 is a high-severity command injection vulnerability in Cisco Adaptive Security Appliance Software, published on 18 Aug 2016. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Cisco Adaptive Security Appliance (ASA) Software before 8.4(1) on ASA 5500, ASA 5500-X, PIX, and FWSM devices allows local users to gain privileges via invalid CLI commands, aka Bug ID CSCtu74257 or EPICBANANA.

Weakness: CWE-77 (Improper Neutralization of Special Elements used in a Command)

## Which versions are affected by CVE-2016-6367?

It affects 1 product.


Products: Cisco Adaptive Security Appliance Software.

## How do I fix CVE-2016-6367?

No fix has been published for CVE-2016-6367 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 14 Jun 2022.

## Is CVE-2016-6367 being exploited?

Yes. Attackers have exploited CVE-2016-6367 in the wild since at least 24 May 2022.

Public exploit code:

- Cisco ASA / PIX - 'EPICBANANA' Local Privilege Escalation (exploitdb)

## Other vulnerabilities in Cisco Adaptive Security Appliance Software

- [CVE-2025-20333](https://insights.sbomify.com/CVE-2025-20333/): Cisco Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) Buffer Overflow (critical 9.9, exploited in the wild)
- [CVE-2016-6366](https://insights.sbomify.com/CVE-2016-6366/): Cisco Adaptive Security Appliance (ASA) SNMP Buffer Overflow (high 8.8, exploited in the wild)
- [CVE-2026-20349](https://insights.sbomify.com/CVE-2026-20349/): Cisco Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) Heap Inspection (high 8.6, exploited in the wild)
- [CVE-2024-20353](https://insights.sbomify.com/CVE-2024-20353/): Cisco ASA and FTD Denial of Service (high 8.6, exploited in the wild)
- [CVE-2020-3452](https://insights.sbomify.com/CVE-2020-3452/): Cisco ASA and FTD Read-Only Path Traversal (high 7.5, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2016-6367 and fix it if it is affected.

What it is: CVE-2016-6367 is a high-severity command injection vulnerability in Cisco Adaptive Security Appliance Software, published on 18 Aug 2016. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: Yes. Attackers have exploited CVE-2016-6367 in the wild since at least 24 May 2022.

Affected product: Cisco Adaptive Security Appliance Software. 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-2016-6367/ (Markdown: https://insights.sbomify.com/CVE-2016-6367/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2016-6367
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2016-6367
- OSV: https://osv.dev/vulnerability/CVE-2016-6367

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From sbomify Insights: https://insights.sbomify.com/CVE-2016-6367/
Summaries are generated and may contain mistakes; the official description above is the record.