# CVE-2026-20187: Cisco RoomOS Security Hardening Release - Exceptional Conditions Handling Vulnerabilities

> Cisco RoomOS contains vulnerabilities in handling exceptional conditions that could lead to denial of service, requiring a software update.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 15 Jul 2026
- **Updated:** 14 Aug 2026
- **Also known as:** GHSA-xmhm-hhwr-f9fp

## What is CVE-2026-20187?

CVE-2026-20187 is a high-severity vulnerability in Cisco RoomOS Software, published on 15 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco RoomOS engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities.

The vulnerabilities tracked by CVE-2026-20187 are related to improper handling of exceptional conditions that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-703.

Weakness: CWE-703 (Improper Check or Handling of Exceptional Conditions)

## Which versions are affected by CVE-2026-20187?

It affects 2 products.


Products: Cisco Roomos, Cisco Roomos Cloud.

## How do I fix CVE-2026-20187?

No fix has been published for CVE-2026-20187 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-20187 being exploited?

There is no known exploitation of CVE-2026-20187 in the wild and no public exploit code.

## Other vulnerabilities in Cisco RoomOS Software

- [CVE-2026-20150](https://insights.sbomify.com/CVE-2026-20150/): Cisco RoomOS Security Hardening Release - Access Control Vulnerabilities (high 8.8)
- [CVE-2019-15288](https://insights.sbomify.com/CVE-2019-15288/): Cisco TelePresence Collaboration Endpoint, TelePresence Codec, and RoomOS Software Privilege Escalation Vulnerability (high 8.8)
- [CVE-2026-20156](https://insights.sbomify.com/CVE-2026-20156/): Cisco RoomOS Security Hardening Release - Buffer Management Vulnerabilities (high 8.1)
- [CVE-2026-20153](https://insights.sbomify.com/CVE-2026-20153/): Cisco RoomOS Security Hardening Release - Input Validation Vulnerabilities (high 7.5)
- [CVE-2026-20157](https://insights.sbomify.com/CVE-2026-20157/): Cisco RoomOS Security Hardening Release - Missing Encryption Vulnerabilities (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-20187 and fix it if it is affected.

What it is: CVE-2026-20187 is a high-severity vulnerability in Cisco RoomOS Software, published on 15 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-20187 in the wild and no public exploit code.

Affected product: Cisco RoomOS 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-2026-20187/ (Markdown: https://insights.sbomify.com/CVE-2026-20187/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-20187
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-20187
- OSV: https://osv.dev/vulnerability/CVE-2026-20187

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-20187/
Summaries are generated and may contain mistakes; the official description above is the record.