CVE-2001-0233: Buffer overflow in micq client 0.4.6 and earlier allows remote attackers to cause a denial of service, and pos

Q: How do I fix CVE-2001-0233?

micq: upgrade to newer than 0.4.6; debian linux: mitigate or apply the listed mitigation; linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2001-0233 being exploited?

CVE-2001-0233 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2001-0233 affect?

CVE-2001-0233 affects micq, debian linux, linux. Severity is high (CVSS 10.0). Buffer overflow in micq client 0.4.6 and earlier allows remote attackers to cause a denial of service, and possibly execute arbitrary commands, via a long Description field.

Q: How urgent is CVE-2001-0233?

Priority 69/100. Critical severity; EPSS top 3%: very likely to be exploited; Public exploit reference; On your watchlist

This week

HIGH 10.0WATCHLISTUPGRADEMITIGATEMITIGATE

CVE-2001-0233 is a high-severity flaw (CVSS 10.0) affecting micq, debian linux, linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in micq client 0.4.6 and earlier allows remote attackers to cause a denial of service, and possibly execute arbitrary commands, via a long Description field.

Why this priority

Critical severity
EPSS top 3%: very likely to be exploited
Public exploit reference
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	10.0 (High)
EPSS exploit chance	14.6% (top 3%)
CISA exploited list	No
Published	2001-03-26
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: debian · matthew smith · redhat

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

Am I affected?

Timeline

2001-03-26 05:00 UTCPublished CVE record published
2026-06-16 21:53 UTCUpdated Record last modified

matthew smith micq UPGRADE

Affected: <= 0.4.6

Fixed in: newer than 0.4.6

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 0.4.6 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade micq

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade micq

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

debian debian linux MITIGATE

Affected: 2.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.2

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

redhat linux MITIGATE

Affected: 6.0 · 6.1 · 6.2 · 7.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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: mICQ 0.4.6 - Remote 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-2001-0233?

micq: upgrade to newer than 0.4.6; debian linux: mitigate or apply the listed mitigation; linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2001-0233 being exploited?

CVE-2001-0233 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-2001-0233 affect?

CVE-2001-0233 affects micq, debian linux, linux. Severity is high (CVSS 10.0). Buffer overflow in micq client 0.4.6 and earlier allows remote attackers to cause a denial of service, and possibly execute arbitrary commands, via a long Description field.

How urgent is CVE-2001-0233?

Priority 69/100. Critical severity; EPSS top 3%: very likely to be exploited; Public exploit reference; On your watchlist

Software pages

Debian vulnerabilities

Related CVEs

CVE-2002-1362 MEDIUM 5.0 DOWNGRADE mICQ 0.4.9 and earlier allows remote attackers to cause a denial of service (crash) via malformed ICQ message

References

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