CVE-2002-2421: acWEB 1.14 allows remote attackers to cause a denial of service (crash) via an HTTP request for a MS-DOS devic

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HIGH 7.8DOWNGRADE

CVE-2002-2421 is a high-severity flaw (CVSS 7.8) affecting acweb. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

acWEB 1.14 allows remote attackers to cause a denial of service (crash) via an HTTP request for a MS-DOS device name such as COM2.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	7.8 (High)
EPSS exploit chance	1.3% (top 30%)
CISA exploited list	No
Weakness	CWE-20
Published	2002-12-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: andrey cherezov

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

Am I affected?

Timeline

2002-12-31 05:00 UTCPublished CVE record published
2026-06-16 22:01 UTCUpdated Record last modified

andrey cherezov acweb DOWNGRADE

Affected: 1.14

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.14

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.14 (Debian / Ubuntu)

apt-cache madison acweb sudo apt install acweb=<VERSION_BEFORE_1.14> sudo apt-mark hold acweb

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

dnf --showduplicates list acweb sudo dnf downgrade acweb-<VERSION_BEFORE_1.14> sudo dnf versionlock add acweb

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-2002-2421?

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

Is CVE-2002-2421 being exploited?

CVE-2002-2421 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-2002-2421 affect?

CVE-2002-2421 affects acweb. Severity is high (CVSS 7.8). acWEB 1.14 allows remote attackers to cause a denial of service (crash) via an HTTP request for a MS-DOS device name such as COM2.

How urgent is CVE-2002-2421?

Priority 50/100. High severity; Public exploit reference

Related CVEs

CVE-2002-2171 MEDIUM 4.3 DOWNGRADE Cross-site scripting (XSS) vulnerability in acWEB 1.8 and 1.14 allows remote attackers to insert arbitrary HTM

References

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