# CVE-2026-9864: Fortra BoKS Server Agent adjoin machine-account password generation vulnerability

> Predictable machine-account passwords in Fortra BoKS allow attackers to guess credentials and gain unauthorized access to joined systems.

- **Severity:** Medium 4.8 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 1 Oct 2026
- **Updated:** 1 Oct 2026
- **Also known as:** GHSA-rh95-jwc3-f9fr

## What is CVE-2026-9864?

CVE-2026-9864 is a medium-severity vulnerability in Fortra Core Privileged Access Manager (BoKS), published on 1 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Fortra BoKS Server Agent contains a predictable password generation vulnerability in the adjoin utility. Machine-account passwords generated during Active Directory join or password renewal operations may have significantly less entropy than intended, making them more susceptible to prediction by an attacker who can estimate when the password was generated.

Weakness: CWE-338 (Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG))

## Which versions are affected by CVE-2026-9864?


## How do I fix CVE-2026-9864?

No fix has been published for CVE-2026-9864 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-9864 being exploited?

There is no known exploitation of CVE-2026-9864 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-9864 and fix it if it is affected.

What it is: CVE-2026-9864 is a medium-severity vulnerability in Fortra Core Privileged Access Manager (BoKS), published on 1 Oct 2026. 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-2026-9864 in the wild and no public exploit code.

Affected product: Fortra Core Privileged Access Manager (BoKS). 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-2026-9864/ (Markdown: https://insights.sbomify.com/CVE-2026-9864/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-9864
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-9864
- OSV: https://osv.dev/vulnerability/CVE-2026-9864

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-9864/
Summaries are generated and may contain mistakes; the official description above is the record.