# CVE-2021-1570: Cisco Jabber Desktop and Mobile Client Software Vulnerabilities

> Attackers can cause denial of service or access sensitive information in Cisco Jabber clients on Windows, Mac, and mobile platforms.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/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:** 16 Jun 2021
- **Updated:** 7 Nov 2024
- **Also known as:** GHSA-34hj-xw38-hm2j

## What is CVE-2021-1570?

CVE-2021-1570 is a medium-severity denial of service vulnerability in Cisco Jabber, published on 16 Jun 2021. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Multiple vulnerabilities in Cisco Jabber for Windows, Cisco Jabber for Mac, and Cisco Jabber for mobile platforms could allow an attacker to access sensitive information or cause a denial of service (DoS) condition. For more information about these vulnerabilities, see the Details section of this advisory.

Weakness: CWE-20 (Improper Input Validation), CWE-399

## Which versions are affected by CVE-2021-1570?

It affects 1 product.


Products: Cisco Jabber.

## How do I fix CVE-2021-1570?

No fix has been published for CVE-2021-1570 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-1570 being exploited?

There is no known exploitation of CVE-2021-1570 in the wild and no public exploit code.

## Other vulnerabilities in Cisco Jabber

- [CVE-2021-1411](https://insights.sbomify.com/CVE-2021-1411/): Cisco Jabber Desktop and Mobile Client Software Vulnerabilities (critical 9.9)
- [CVE-2021-1417](https://insights.sbomify.com/CVE-2021-1417/): Cisco Jabber Desktop and Mobile Client Software Vulnerabilities (critical 9.9)
- [CVE-2021-1418](https://insights.sbomify.com/CVE-2021-1418/): Cisco Jabber Desktop and Mobile Client Software Vulnerabilities (critical 9.9)
- [CVE-2021-1469](https://insights.sbomify.com/CVE-2021-1469/): Cisco Jabber Desktop and Mobile Client Software Vulnerabilities (critical 9.9)
- [CVE-2021-1471](https://insights.sbomify.com/CVE-2021-1471/): Cisco Jabber Desktop and Mobile Client Software Vulnerabilities (critical 9.9)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-1570 and fix it if it is affected.

What it is: CVE-2021-1570 is a medium-severity denial of service vulnerability in Cisco Jabber, published on 16 Jun 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-1570 in the wild and no public exploit code.

Affected product: Cisco Jabber. 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-2021-1570/ (Markdown: https://insights.sbomify.com/CVE-2021-1570/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-1570
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-1570
- OSV: https://osv.dev/vulnerability/CVE-2021-1570

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-1570/
Summaries are generated and may contain mistakes; the official description above is the record.