# CVE-2025-62691: Memory corruption in Security Point (Windows) of MaLion

> Remote unauthenticated attackers can execute arbitrary code with SYSTEM privileges via a stack-based buffer overflow in HTTP header processing.

- **Severity:** Critical 9.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 25 Nov 2025
- **Updated:** 25 Nov 2025
- **Also known as:** GHSA-2fg2-rf2v-2fh3

## What is CVE-2025-62691?

CVE-2025-62691 is a critical memory corruption vulnerability in Intercom, Inc. Security Point (Windows) of MaLion, published on 25 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Security Point (Windows) of MaLion and MaLionCloud contains a stack-based buffer overflow vulnerability in processing HTTP headers. Receiving a specially crafted request from a remote unauthenticated attacker could lead to arbitrary code execution with SYSTEM privilege.

Weakness: CWE-121 (Stack-based Buffer Overflow)

## Which versions are affected by CVE-2025-62691?


## How do I fix CVE-2025-62691?

No fix has been published for CVE-2025-62691 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-62691 being exploited?

There is no known exploitation of CVE-2025-62691 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-62691 and fix it if it is affected.

What it is: CVE-2025-62691 is a critical memory corruption vulnerability in Intercom, Inc. Security Point (Windows) of MaLion, published on 25 Nov 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-2025-62691 in the wild and no public exploit code.

Affected product: Intercom, Inc. Security Point (Windows) of MaLion. 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-2025-62691/ (Markdown: https://insights.sbomify.com/CVE-2025-62691/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-62691
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-62691
- OSV: https://osv.dev/vulnerability/CVE-2025-62691

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From sbomify Insights: https://insights.sbomify.com/CVE-2025-62691/
Summaries are generated and may contain mistakes; the official description above is the record.