# CVE-2025-5456: Denial of service in Connect Secure

> Remote unauthenticated attackers can cause a denial of service in Ivanti Connect Secure and related gateways via a buffer over-read vulnerability.

- **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:** 12 Aug 2025
- **Updated:** 12 Aug 2025
- **Also known as:** GHSA-68xg-w9gf-2gr9

## What is CVE-2025-5456?

CVE-2025-5456 is a high-severity denial of service vulnerability in Ivanti Connect Secure, published on 12 Aug 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A buffer over-read vulnerability in Ivanti Connect Secure before 22.7R2.8 or 22.8R2, Ivanti Policy Secure before 22.7R1.5, Ivanti ZTA Gateway before 2.8R2.3-723 and Ivanti Neurons for Secure Access before 22.8R1.4 (Fix deployed on 02-Aug-2025) allows a remote unauthenticated attacker to trigger a denial of service. CWE-125

Weakness: CWE-125 (Out-of-bounds Read)

## Which versions are affected by CVE-2025-5456?

It affects 4 products.


Products: Ivanti Connect Secure, Ivanti Neurons for Secure Access, Ivanti Policy Secure, Ivanti Zero Trust Access Gateway.

## How do I fix CVE-2025-5456?

No fix has been published for CVE-2025-5456 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-5456 being exploited?

There is no known exploitation of CVE-2025-5456 in the wild and no public exploit code.

## 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-2025-5456 and fix it if it is affected.

What it is: CVE-2025-5456 is a high-severity denial of service vulnerability in Ivanti Connect Secure, published on 12 Aug 2025. 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-2025-5456 in the wild and no public exploit code.

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-2025-5456/ (Markdown: https://insights.sbomify.com/CVE-2025-5456/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-5456
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-5456
- OSV: https://osv.dev/vulnerability/CVE-2025-5456

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-5456/
Summaries are generated and may contain mistakes; the official description above is the record.