CVE-2001-1223: The web administration server for ELSA Lancom 1100 Office does not require authentication, which allows arbitr

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HIGH 10.0DOWNGRADE

CVE-2001-1223 is a high-severity flaw (CVSS 10.0) affecting lancom 1100 office. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The web administration server for ELSA Lancom 1100 Office does not require authentication, which allows arbitrary remote attackers to gain administrative privileges by connecting to the server.

Why this priority

Critical severity

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

Risk facts

CVSS score	10.0 (High)
EPSS exploit chance	2.8% (top 13%)
CISA exploited list	No
Published	2001-12-26
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: elsa

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

Am I affected?

Timeline

2001-12-26 05:00 UTCPublished CVE record published
2026-06-16 21:55 UTCUpdated Record last modified

elsa lancom 1100 office DOWNGRADE

Affected: 0.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.0

1. Check installed version

apt-cache policy lancom-1100-office || rpm -q lancom-1100-office || lancom-1100-office --version

2. No fixed release: DOWNGRADE to a release before 0.0 (Debian / Ubuntu)

apt-cache madison lancom-1100-office sudo apt install lancom-1100-office=<VERSION_BEFORE_0.0> sudo apt-mark hold lancom-1100-office

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

dnf --showduplicates list lancom-1100-office sudo dnf downgrade lancom-1100-office-<VERSION_BEFORE_0.0> sudo dnf versionlock add lancom-1100-office

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-2001-1223?

lancom 1100 office: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2001-1223 being exploited?

CVE-2001-1223 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-2001-1223 affect?

CVE-2001-1223 affects lancom 1100 office. Severity is high (CVSS 10.0). The web administration server for ELSA Lancom 1100 Office does not require authentication, which allows arbitrary remote attackers to gain administrative privileges by connecting to the server.

How urgent is CVE-2001-1223?

Priority 57/100. Critical severity

References

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