# CVE-2025-55113: BMC Control-M/Agent unescaped NULL byte in access control list checks

> Attackers can bypass Access Control Lists in BMC Control-M/Agent by exploiting NULL byte handling in certificate email verification when the C router is active.

- **Severity:** Critical 9.5 (`CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 16 Sep 2025
- **Updated:** 26 Feb 2026
- **Also known as:** GHSA-r6f6-cvqf-h86g

## What is CVE-2025-55113?

CVE-2025-55113 is a critical authentication bypass vulnerability in BMC Control-M/Agent, published on 16 Sep 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

If the Access Control List is enforced by the Control-M/Agent and the C router is in use (default in Out-of-support Control-M/Agent versions 9.0.18 to 9.0.20 and potentially earlier unsupported versions; non-default but configurable using the JAVA_AR setting in newer versions), the verification stops at the first NULL byte encountered in the email address referenced in the client certificate. An attacker could bypass configured ACLs by using a specially crafted certificate.

Weakness: CWE-158 (Improper Neutralization of Null Byte or NUL Character)

## Which versions are affected by CVE-2025-55113?

It affects 1 product.


Products: Bmc Control-M\/Agent.

## How do I fix CVE-2025-55113?

No fix has been published for CVE-2025-55113 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-55113 being exploited?

There is no known exploitation of CVE-2025-55113 in the wild and no public exploit code.

## Other vulnerabilities in BMC Control-M/Agent

- [CVE-2025-55109](https://insights.sbomify.com/CVE-2025-55109/): BMC Control-M/Agent default SSL/TLS configuration authenticated bypass (critical 9.5)
- [CVE-2025-55115](https://insights.sbomify.com/CVE-2025-55115/): BMC Control-M/Agent path traversal local privilege escalation (critical 9.3)
- [CVE-2025-55116](https://insights.sbomify.com/CVE-2025-55116/): BMC Control-M/Agent buffer overflow local privilege escalation (critical 9.3)
- [CVE-2025-55112](https://insights.sbomify.com/CVE-2025-55112/): BMC Control-M/Agent hardcoded Blowfish keys (high 7.6)
- [CVE-2025-55117](https://insights.sbomify.com/CVE-2025-55117/): BMC Control-M/Agent buffer overflow in SSL/TLS communication (medium 6.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-55113 and fix it if it is affected.

What it is: CVE-2025-55113 is a critical authentication bypass vulnerability in BMC Control-M/Agent, published on 16 Sep 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-2025-55113 in the wild and no public exploit code.

Affected product: BMC Control-M/Agent. 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-2025-55113/ (Markdown: https://insights.sbomify.com/CVE-2025-55113/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-55113
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-55113
- OSV: https://osv.dev/vulnerability/CVE-2025-55113

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-55113/
Summaries are generated and may contain mistakes; the official description above is the record.