# CVE-2021-29707: Privilege escalation in Power HMC

> A local user can escalate privileges to root on the IBM Hardware Management Console restricted shell.

- **Severity:** High 8.4 (`CVSS:3.0/AC:L/C:H/A:H/AV:L/S:U/I:H/PR:N/UI:N/RL:O/RC:C/E:U`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 19 Jul 2021
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-fj5q-8vp6-c5jg

## What is CVE-2021-29707?

CVE-2021-29707 is a high-severity vulnerability in IBM Power HMC, published on 19 Jul 2021. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

IBM HMC (Hardware Management Console) V9.1.910.0 and V9.2.950.0 could allow a local user to escalate their privileges to root access on a restricted shell. IBM X-Force ID: 200879.

## Which versions are affected by CVE-2021-29707?

It affects 1 product.


Products: Ibm Hardware Management Console.

## How do I fix CVE-2021-29707?

No fix has been published for CVE-2021-29707 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-29707 being exploited?

There is no known exploitation of CVE-2021-29707 in the wild and no public exploit code.

## Other vulnerabilities in IBM Power HMC

- [CVE-2009-0178](https://insights.sbomify.com/CVE-2009-0178/): Other in n/a (critical 10.0)
- [CVE-2007-6293](https://insights.sbomify.com/CVE-2007-6293/): Privilege escalation in n/a (critical 10.0)
- [CVE-2026-12943](https://insights.sbomify.com/CVE-2026-12943/): This Power Hardware Management Console update is being released to address (critical 9.8)
- [CVE-2025-1950](https://insights.sbomify.com/CVE-2025-1950/): IBM Hardware Management Console - Power Systems command execution (critical 9.3)
- [CVE-2009-1806](https://insights.sbomify.com/CVE-2009-1806/): Other in n/a (critical 9.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-29707 and fix it if it is affected.

What it is: CVE-2021-29707 is a high-severity vulnerability in IBM Power HMC, published on 19 Jul 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-29707 in the wild and no public exploit code.

Affected product: IBM Power HMC. 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-2021-29707/ (Markdown: https://insights.sbomify.com/CVE-2021-29707/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-29707
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-29707
- OSV: https://osv.dev/vulnerability/CVE-2021-29707

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-29707/
Summaries are generated and may contain mistakes; the official description above is the record.