CVE-2000-0766: Buffer overflow in vqSoft vqServer 1.4.49 allows remote attackers to cause a denial of service or possibly gai

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HIGH 7.5DOWNGRADE

CVE-2000-0766 is a high-severity flaw (CVSS 7.5) affecting vqserver. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in vqSoft vqServer 1.4.49 allows remote attackers to cause a denial of service or possibly gain privileges via a long HTTP GET request.

Why this priority

High severity
EPSS top 6%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	7.3% (top 6%)
CISA exploited list	No
Published	2000-10-20
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: vqsoft

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

Am I affected?

Timeline

2000-10-20 04:00 UTCPublished CVE record published
2026-06-16 21:52 UTCUpdated Record last modified

vqsoft vqserver DOWNGRADE

Affected: 1.4.49

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.4.49

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.4.49 (Debian / Ubuntu)

apt-cache madison vqserver sudo apt install vqserver=<VERSION_BEFORE_1.4.49> sudo apt-mark hold vqserver

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

dnf --showduplicates list vqserver sudo dnf downgrade vqserver-<VERSION_BEFORE_1.4.49> sudo dnf versionlock add vqserver

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: vqSoft vqServer 1.4.49 - Denial of Service

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-2000-0766?

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

Is CVE-2000-0766 being exploited?

CVE-2000-0766 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-2000-0766 affect?

CVE-2000-0766 affects vqserver. Severity is high (CVSS 7.5). Buffer overflow in vqSoft vqServer 1.4.49 allows remote attackers to cause a denial of service or possibly gain privileges via a long HTTP GET request.

How urgent is CVE-2000-0766?

Priority 55/100. High severity; EPSS top 6%: very likely to be exploited; Public exploit reference

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References

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