# CVE-2021-22894: Ivanti Pulse Connect Secure Collaboration Suite Buffer Overflow

> Remote authenticated attackers can execute arbitrary code as root via a buffer overflow in Pulse Connect Secure meeting rooms.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Yes, since 3 Nov 2021 (CISA KEV)
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 27 May 2021
- **Updated:** 21 Oct 2025
- **Also known as:** GHSA-2f6h-jr2m-2vpj

## What is CVE-2021-22894?

CVE-2021-22894 is a high-severity memory corruption vulnerability in Ivanti Connect Secure, published on 27 May 2021. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A buffer overflow vulnerability exists in Pulse Connect Secure before 9.1R11.4 allows a remote authenticated attacker to execute arbitrary code as the root user via maliciously crafted meeting room.

Weakness: CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer), CWE-94 (Improper Control of Generation of Code)

## Which versions are affected by CVE-2021-22894?

It affects 1 product.


Products: Ivanti Connect Secure.

## How do I fix CVE-2021-22894?

No fix has been published for CVE-2021-22894 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 3 May 2022.

## Is CVE-2021-22894 being exploited?

Yes. Attackers have exploited CVE-2021-22894 in the wild since at least 3 Nov 2021.

## Other vulnerabilities in Ivanti Connect Secure

- [CVE-2021-22893](https://insights.sbomify.com/CVE-2021-22893/): Ivanti Pulse Connect Secure Use-After-Free (critical 10.0, exploited in the wild)
- [CVE-2019-11510](https://insights.sbomify.com/CVE-2019-11510/): Ivanti Pulse Connect Secure Arbitrary File Read (critical 9.9, exploited in the wild)
- [CVE-2024-21887](https://insights.sbomify.com/CVE-2024-21887/): Ivanti Connect Secure and Policy Secure Command Injection (critical 9.1, exploited in the wild)
- [CVE-2025-22457](https://insights.sbomify.com/CVE-2025-22457/): Ivanti Connect Secure, Policy Secure, and ZTA Gateways Stack-Based Buffer Overflow (critical 9.0, exploited in the wild)
- [CVE-2025-0282](https://insights.sbomify.com/CVE-2025-0282/): Ivanti Connect Secure, Policy Secure, and ZTA Gateways Stack-Based Buffer Overflow (critical 9.0, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-22894 and fix it if it is affected.

What it is: CVE-2021-22894 is a high-severity memory corruption vulnerability in Ivanti Connect Secure, published on 27 May 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: Yes. Attackers have exploited CVE-2021-22894 in the wild since at least 3 Nov 2021.

Affected product: Ivanti Connect Secure. 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-2021-22894/ (Markdown: https://insights.sbomify.com/CVE-2021-22894/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-22894
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-22894
- OSV: https://osv.dev/vulnerability/CVE-2021-22894

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-22894/
Summaries are generated and may contain mistakes; the official description above is the record.