CVE-2020-27372: A buffer overflow vulnerability exists in Brandy Basic V Interpreter 1.21 in the run_interpreter function.

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2020-27372 is a critical-severity flaw (CVSS 9.8) affecting brandy. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A buffer overflow vulnerability exists in Brandy Basic V Interpreter 1.21 in the run_interpreter function.

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.6% (top 24%)
CISA exploited list	No
Weakness	CWE-120
Published	2021-10-11
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: brandy project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-10-11 19:15 UTCPublished CVE record published
2026-06-17 03:09 UTCUpdated Record last modified

brandy project brandy DOWNGRADE

Affected: 1.21

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.21

1. Check installed version

apt-cache policy brandy || rpm -q brandy || brandy --version

2. No fixed release: DOWNGRADE to a release before 1.21 (Debian / Ubuntu)

apt-cache madison brandy sudo apt install brandy=<VERSION_BEFORE_1.21> sudo apt-mark hold brandy

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list brandy sudo dnf downgrade brandy-<VERSION_BEFORE_1.21> sudo dnf versionlock add brandy

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
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-2020-27372?

brandy: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-27372 being exploited?

CVE-2020-27372 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-2020-27372 affect?

CVE-2020-27372 affects brandy. Severity is critical (CVSS 9.8). A buffer overflow vulnerability exists in Brandy Basic V Interpreter 1.21 in the run_interpreter function.

How urgent is CVE-2020-27372?

Priority 63/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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