# CVE-2019-1923: Cisco Small Business SPA500 Series IP Phones Local Command Execution Vulnerability

> A physically proximate attacker can execute arbitrary commands with elevated privileges on Cisco SPA500 IP phones via the configuration interface and USB insertion.

- **Severity:** Medium 6.6 (`CVSS:3.0/AV:P/AC:L/PR:L/UI:N/S:U/C:H/I:H/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:** 17 Jul 2019
- **Updated:** 20 Nov 2024
- **Also known as:** GHSA-pcwq-7vcg-g735

## What is CVE-2019-1923?

CVE-2019-1923 is a medium-severity command injection vulnerability in Cisco SPA525G2 5-line IP Phone, published on 17 Jul 2019. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A vulnerability in Cisco Small Business SPA500 Series IP Phones could allow a physically proximate attacker to execute arbitrary commands on the device. The vulnerability is due to improper input validation in the device configuration interface. An attacker could exploit this vulnerability by accessing the configuration interface, which may require a password, and then accessing the device's physical interface and inserting a USB storage device. A successful exploit could allow the attacker to execute arbitrary commands on the device in an elevated security context. At the time of publication, this vulnerability affected Cisco Small Business SPA500 Series IP Phones firmware releases 7.6.2SR5 and prior.

Weakness: CWE-20 (Improper Input Validation), CWE-77 (Improper Neutralization of Special Elements used in a Command)

## Which versions are affected by CVE-2019-1923?

It affects 10 products.


Products: Cisco Spa500ds Firmware, Cisco Spa500s Firmware, Cisco Spa501g Firmware, Cisco Spa502g Firmware, Cisco Spa504g Firmware, Cisco Spa508g Firmware, Cisco Spa509g Firmware, Cisco Spa512g Firmware, Cisco Spa514g Firmware, Cisco Spa525g2 Firmware.

## How do I fix CVE-2019-1923?

No fix has been published for CVE-2019-1923 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-1923 being exploited?

There is no known exploitation of CVE-2019-1923 in the wild and no public exploit code.

## Other vulnerabilities in Cisco SPA525G2 5-line IP Phone

- [CVE-2023-20181](https://insights.sbomify.com/CVE-2023-20181/): Cross-site scripting in Cisco Small Business IP Phones (medium 6.1)
- [CVE-2023-20218](https://insights.sbomify.com/CVE-2023-20218/): Cross-site scripting in Cisco Small Business IP Phones (medium 5.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-1923 and fix it if it is affected.

What it is: CVE-2019-1923 is a medium-severity command injection vulnerability in Cisco SPA525G2 5-line IP Phone, published on 17 Jul 2019. 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-2019-1923 in the wild and no public exploit code.

Affected product: Cisco SPA525G2 5-line IP Phone. 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-2019-1923/ (Markdown: https://insights.sbomify.com/CVE-2019-1923/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-1923
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-1923
- OSV: https://osv.dev/vulnerability/CVE-2019-1923

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From sbomify Insights: https://insights.sbomify.com/CVE-2019-1923/
Summaries are generated and may contain mistakes; the official description above is the record.