CVE-2002-0197: psyBNC 2.3 beta and earlier allows remote attackers to spoof encrypted, trusted messages by sending lines that

Q: How do I fix CVE-2002-0197?

psybnc: upgrade to newer than 2.3. Exact commands for each OS are on this page.

Q: Is CVE-2002-0197 being exploited?

CVE-2002-0197 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-2002-0197 affect?

CVE-2002-0197 affects psybnc. Severity is high (CVSS 7.5). psyBNC 2.3 beta and earlier allows remote attackers to spoof encrypted, trusted messages by sending lines that begin with the "[B]" sequence, which makes the message appear legitimate.

This month

HIGH 7.5UPGRADE

CVE-2002-0197 is a high-severity flaw (CVSS 7.5) affecting psybnc. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

psyBNC 2.3 beta and earlier allows remote attackers to spoof encrypted, trusted messages by sending lines that begin with the "[B]" sequence, which makes the message appear legitimate.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	2.5% (top 16%)
CISA exploited list	No
Published	2002-05-16
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: psychoid

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

Am I affected?

Timeline

2002-05-16 04:00 UTCPublished CVE record published
2026-06-16 21:56 UTCUpdated Record last modified

psychoid psybnc UPGRADE

Affected: <= 2.3

Fixed in: newer than 2.3

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 2.3 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade psybnc

Note

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

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-2002-0197?

psybnc: upgrade to newer than 2.3. Exact commands for each OS are on this page.

Is CVE-2002-0197 being exploited?

CVE-2002-0197 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-2002-0197 affect?

CVE-2002-0197 affects psybnc. Severity is high (CVSS 7.5). psyBNC 2.3 beta and earlier allows remote attackers to spoof encrypted, trusted messages by sending lines that begin with the "[B]" sequence, which makes the message appear legitimate.

How urgent is CVE-2002-0197?

Priority 47/100. High severity

Related CVEs

CVE-2002-0741 MEDIUM 5.0 DOWNGRADE psyBNC 2.3 allows remote attackers to cause a denial of service (CPU consumption and resource exhaustion) by s

References

← Back to latest CVEs