CVE-2002-0256: The telnet port in Arescom NetDSL 1000 router allows remote attackers to cause a denial of service via a serie

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MEDIUM 5.0MITIGATE

CVE-2002-0256 is a medium-severity flaw (CVSS 5.0) affecting netdsl. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The telnet port in Arescom NetDSL 1000 router allows remote attackers to cause a denial of service via a series of connections with long strings, which causes a large number of login failures and causes the telnet service to stop.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	3.2% (top 12%)
CISA exploited list	No
Published	2002-05-29
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: arescom

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

Am I affected?

Timeline

2002-05-29 04:00 UTCPublished CVE record published
2026-06-16 21:57 UTCUpdated Record last modified

arescom netdsl MITIGATE

Affected: 1000

Fixed in: no fixed release known

Safe to downgrade to: a release before 1000

Firmware

Install the latest firmware from the vendor advisory; if none, apply the vendor workaround.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: Arescom NetDSL-1000 - 'TelnetD' Remote Denial of Service

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-2002-0256?

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

Is CVE-2002-0256 being exploited?

CVE-2002-0256 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-2002-0256 affect?

CVE-2002-0256 affects netdsl. Severity is medium (CVSS 5.0). The telnet port in Arescom NetDSL 1000 router allows remote attackers to cause a denial of service via a series of connections with long strings, which causes a large number of login failures and causes the telnet service to stop.

How urgent is CVE-2002-0256?

Priority 44/100. Public exploit reference

Related CVEs

CVE-2002-0255 HIGH 10.0 MITIGATE The default configuration of Arescom NetDSL 800 does not require authentication, which allows remote attackers

References

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