PatchTheCVECVE-2025-27591: A privilege escalation vulnerability existed in the Below service prior to v0.9.0 due to the creation of a wor
CVE-2025-27591 is a medium-severity flaw (CVSS 6.8) affecting below. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
A privilege escalation vulnerability existed in the Below service prior to v0.9.0 due to the creation of a world-writable directory at /var/log/below. This could have allowed local unprivileged users to escalate to root privileges through symlink attacks that manipulate files such as /etc/shadow.
Why this priority
- Public exploit reference
A fixed release or distro patch exists.
Risk facts
| CVSS score | 6.8 (Medium) |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.4% (top 69%) |
| CISA exploited list | No |
| Weakness | CWE-732 |
| Published | 2025-03-11 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2025-27591?
below: upgrade to 0.9.0. Exact commands for each OS are on this page.
Is CVE-2025-27591 being exploited?
CVE-2025-27591 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2025-27591 affect?
CVE-2025-27591 affects below. Severity is medium (CVSS 6.8). A privilege escalation vulnerability existed in the Below service prior to v0.9.0 due to the creation of a world-writable directory at /var/log/below. This could have allowed local unprivileged users to escalate to root privileges through s
How urgent is CVE-2025-27591?
Priority 37/100. Public exploit reference