CVE-2001-0759: Buffer overflow in bctool in Jetico BestCrypt 0.8.1 and earlier allows local users to execute arbitrary code v

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HIGH 7.2DOWNGRADE

CVE-2001-0759 is a high-severity flaw (CVSS 7.2) affecting bestcrypt. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in bctool in Jetico BestCrypt 0.8.1 and earlier allows local users to execute arbitrary code via a file or directory with a long pathname, which is processed during an unmount.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	7.2 (High)
EPSS exploit chance	1.3% (top 29%)
CISA exploited list	No
Published	2001-10-18
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: jetico

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2001-10-18 04:00 UTCPublished CVE record published
2026-06-16 21:54 UTCUpdated Record last modified

jetico bestcrypt DOWNGRADE

Affected: 0.6 · 0.7 · 0.8.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.6

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.6 (Debian / Ubuntu)

apt-cache madison bestcrypt sudo apt install bestcrypt=<VERSION_BEFORE_0.6> sudo apt-mark hold bestcrypt

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

dnf --showduplicates list bestcrypt sudo dnf downgrade bestcrypt-<VERSION_BEFORE_0.6> sudo dnf versionlock add bestcrypt

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.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: BestCrypt 0.6/0.7/0.8 - BCTool UMount Buffer Overflow

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-2001-0759?

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

Is CVE-2001-0759 being exploited?

CVE-2001-0759 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-2001-0759 affect?

CVE-2001-0759 affects bestcrypt. Severity is high (CVSS 7.2). Buffer overflow in bctool in Jetico BestCrypt 0.8.1 and earlier allows local users to execute arbitrary code via a file or directory with a long pathname, which is processed during an unmount.

How urgent is CVE-2001-0759?

Priority 48/100. High severity; Public exploit reference

Related CVEs

CVE-2001-1345 MEDIUM 4.6 UPGRADE bctool in Jetico BestCrypt 0.7 and earlier trusts the user-supplied PATH to find and execute an fsck utility p

References

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