CVE-2001-0680: Directory traversal vulnerability in ftpd in QPC QVT/Net 4.0 and AVT/Term 5.0 allows a remote attacker to trav

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MEDIUM 5.0DOWNGRADEDOWNGRADE

CVE-2001-0680 is a medium-severity flaw (CVSS 5.0) affecting avt term, qvt net. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Directory traversal vulnerability in ftpd in QPC QVT/Net 4.0 and AVT/Term 5.0 allows a remote attacker to traverse directories on the web server via a "dot dot" attack in a LIST (ls) command.

Why this priority

EPSS top 7%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	6.0% (top 7%)
CISA exploited list	No
Published	2001-09-20
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: qpc software

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

Am I affected?

Timeline

2001-09-20 04:00 UTCPublished CVE record published
2026-06-16 21:54 UTCUpdated Record last modified

qpc software avt term DOWNGRADE

Affected: 5.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.0

1. Check installed version

apt-cache policy avt-term || rpm -q avt-term || avt-term --version

2. No fixed release: DOWNGRADE to a release before 5.0 (Debian / Ubuntu)

apt-cache madison avt-term sudo apt install avt-term=<VERSION_BEFORE_5.0> sudo apt-mark hold avt-term

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

dnf --showduplicates list avt-term sudo dnf downgrade avt-term-<VERSION_BEFORE_5.0> sudo dnf versionlock add avt-term

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.

qpc software qvt net DOWNGRADE

Affected: 4.0 · 5.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.0

1. Check installed version

apt-cache policy qvt-net || rpm -q qvt-net || qvt-net --version

2. No fixed release: DOWNGRADE to a release before 4.0 (Debian / Ubuntu)

apt-cache madison qvt-net sudo apt install qvt-net=<VERSION_BEFORE_4.0> sudo apt-mark hold qvt-net

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

dnf --showduplicates list qvt-net sudo dnf downgrade qvt-net-<VERSION_BEFORE_4.0> sudo dnf versionlock add qvt-net

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-2001-0680?

avt term: downgrade or apply the listed mitigation; qvt net: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2001-0680 being exploited?

CVE-2001-0680 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-2001-0680 affect?

CVE-2001-0680 affects avt term, qvt net. Severity is medium (CVSS 5.0). Directory traversal vulnerability in ftpd in QPC QVT/Net 4.0 and AVT/Term 5.0 allows a remote attacker to traverse directories on the web server via a "dot dot" attack in a LIST (ls) command.

How urgent is CVE-2001-0680?

Priority 46/100. EPSS top 7%: very likely to be exploited; Public exploit reference

References

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