CVE-2000-0892: Some telnet clients allow remote telnet servers to request environment variables from the client that may cont

Routine

LOW 2.6WATCHLISTMITIGATEMITIGATE

CVE-2000-0892 is a low-severity flaw (CVSS 2.6) affecting u win, openlinux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Some telnet clients allow remote telnet servers to request environment variables from the client that may contain sensitive information, or remote web servers to obtain the information via a telnet: URL.

Why this priority

Public exploit reference
On your watchlist

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

Risk facts

CVSS score	2.6 (Low)
EPSS exploit chance	1.2% (top 33%)
CISA exploited list	No
Published	2001-07-21
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: caldera · u win

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

Am I affected?

Timeline

2001-07-21 04:00 UTCPublished CVE record published
2026-06-16 21:52 UTCUpdated Record last modified

u win u win MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy u-win || rpm -q u-win || u-win --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

caldera openlinux MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

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.

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-2000-0892?

u win: mitigate or apply the listed mitigation; openlinux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2000-0892 being exploited?

CVE-2000-0892 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-2000-0892 affect?

CVE-2000-0892 affects u win, openlinux. Severity is low (CVSS 2.6). Some telnet clients allow remote telnet servers to request environment variables from the client that may contain sensitive information, or remote web servers to obtain the information via a telnet: URL.

How urgent is CVE-2000-0892?

Priority 36/100. Public exploit reference; On your watchlist

References

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