How severe is CVE-2004-0998?

CVE-2004-0998 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2004-0998 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2004-0998?

CVE-2004-0998 primarily affects Telnetd. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2004-0998?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2004-0998 published?

CVE-2004-0998 was published on 2004-12-23 and last updated on 2026-06-16.

CVE-2004-0998

CVE-2004-0998 is a high-severity vulnerability in Telnetd with a CVSS 2.0 base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 6% (92nd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Telnetd
Published: 2004-12-23
Last modified: 2026-06-16

Description

Format string vulnerability in telnetd-ssl 0.17 and earlier allows remote attackers to execute arbitrary code.

Frequently asked questions

What is CVE-2004-0998?: Format string vulnerability in telnetd-ssl 0.17 and earlier allows remote attackers to execute arbitrary code.
How severe is CVE-2004-0998?: CVE-2004-0998 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2004-0998 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2004-0998?: CVE-2004-0998 primarily affects Telnetd. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2004-0998?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2004-0998 published?: CVE-2004-0998 was published on 2004-12-23 and last updated on 2026-06-16.

References

Affected products (5)

cpe:2.3:a:telnetd:telnetd:0.17.18:*:*:*:*:*:*:*
cpe:2.3:a:telnetd:telnetd:0.17.25:*:*:*:*:*:*:*
cpe:2.3:a:telnetd:telnetd-ssl:0.17.17_0.1.1:*:*:*:*:*:*:*
cpe:2.3:a:telnetd:telnetd-ssl:0.17.17_0.1.2:*:*:*:*:*:*:*
cpe:2.3:a:telnetd:telnetd-ssl:0.17.17_0.1.2:*:woody1:*:*:*:*:*

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