CVE-1999-0103

Echo and chargen, or other combinations of UDP services, can be used in tandem to flood the server, a.k.a. UDP bomb or UDP packet storm.

Published: 1996-02-08 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-1999-0103 is rated Moderate Risk (56.3/100): CVSS Medium severity, with high exploitation likelihood (EPSS 45.80%, 98th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +2.09% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-1999-0103

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-04-21 43.71% 45.80% +2.09%
2 2026-02-26 50.26% 43.71% -6.55%
3 2026-01-24 — 50.26% —

Full EPSS history (14 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-1999-0103

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-1999-0103

OS Trackers for CVE-1999-0103

vendor priority summary link
alpine — CVE-1999-0103: no source package rows; 0 state rows across 0 repos (none); fixed 0, open 0. https://security.alpinelinux.org/vuln/CVE-1999-0103

Affected software / configurations for CVE-1999-0103

Vendor Product Version Raw CPE
No affected products in dataset.

References for CVE-1999-0103

cvelogic Threat Intelligence