CVE-2001-0826: Buffer overflows in CesarFTPD 0.98b allows remote attackers to execute arbitrary commands via long arguments t

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HIGH 7.5DOWNGRADE

CVE-2001-0826 is a high-severity flaw (CVSS 7.5) affecting cesarftp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflows in CesarFTPD 0.98b allows remote attackers to execute arbitrary commands via long arguments to (1) HELP, (2) USER, (3) PASS, (4) PORT, (5) DELE, (6) REST, (7) RMD, or (8) MKD.

Why this priority

High severity
EPSS top 9%: very likely to be exploited

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

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	4.0% (top 9%)
CISA exploited list	No
Published	2001-12-06
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: aclogic

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

Am I affected?

Timeline

2001-12-06 05:00 UTCPublished CVE record published
2026-06-16 21:55 UTCUpdated Record last modified

aclogic cesarftp DOWNGRADE

Affected: 0.98b

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.98b

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.98b (Debian / Ubuntu)

apt-cache madison cesarftp sudo apt install cesarftp=<VERSION_BEFORE_0.98b> sudo apt-mark hold cesarftp

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

dnf --showduplicates list cesarftp sudo dnf downgrade cesarftp-<VERSION_BEFORE_0.98b> sudo dnf versionlock add cesarftp

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-2001-0826?

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

Is CVE-2001-0826 being exploited?

CVE-2001-0826 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-2001-0826 affect?

CVE-2001-0826 affects cesarftp. Severity is high (CVSS 7.5). Buffer overflows in CesarFTPD 0.98b allows remote attackers to execute arbitrary commands via long arguments to (1) HELP, (2) USER, (3) PASS, (4) PORT, (5) DELE, (6) REST, (7) RMD, or (8) MKD.

How urgent is CVE-2001-0826?

Priority 49/100. High severity; EPSS top 9%: very likely to be exploited

Related CVEs

CVE-2006-2961 HIGH 7.5 UPGRADE Stack-based buffer overflow in CesarFTP 0.99g and earlier allows remote attackers to cause a denial of service
CVE-2004-0298 MEDIUM 5.0 DOWNGRADE CesarFTP 0.99e allows remote attackers to cause a denial of service (CPU consumption) via a long RETR paramete
CVE-2003-0329 MEDIUM 4.6 DOWNGRADE CesarFTP 0.99g stores user names and passwords in plaintext in the settings.ini file, which could allow local
CVE-2001-1336 HIGH 7.5 UPGRADE CesarFTP 0.98b and earlier stores usernames and passwords in plaintext in the settings.ini file, which allows
CVE-2001-1335 MEDIUM 5.0 DOWNGRADE Directory traversal vulnerability in CesarFTP 0.98b and earlier allows remote authenticated users (such as ano

References

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