How severe is CVE-1999-0817?

CVE-1999-0817 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-1999-0817 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-1999-0817?

CVE-1999-0817 affects University Of Kansas Lynx. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-1999-0817?

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

When was CVE-1999-0817 published?

CVE-1999-0817 was published on 1999-09-15 and last updated on 2026-06-16.

CVE-1999-0817

CVE-1999-0817 is a critical-severity vulnerability in University Of Kansas Lynx with a CVSS 2.0 base score of 10.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Critical (CVSS 2.0 base score 10.0)
EPSS exploit prediction: 3% (86th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: University Of Kansas Lynx
Published: 1999-09-15
Last modified: 2026-06-16

Description

Lynx WWW client allows a remote attacker to specify command-line parameters which Lynx uses when calling external programs to handle certain protocols, e.g. telnet.

Frequently asked questions

What is CVE-1999-0817?: Lynx WWW client allows a remote attacker to specify command-line parameters which Lynx uses when calling external programs to handle certain protocols, e.g. telnet.
How severe is CVE-1999-0817?: CVE-1999-0817 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-1999-0817 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-0817?: CVE-1999-0817 affects University Of Kansas Lynx. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-1999-0817?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-1999-0817 published?: CVE-1999-0817 was published on 1999-09-15 and last updated on 2026-06-16.

References

https://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0817

Affected products (1)

cpe:2.3:a:university_of_kansas:lynx:*:*:*:*:*:*:*:*

More vulnerabilities in University Of Kansas Lynx

CVE-2000-0209 — High (CVSS 7.6): Buffer overflow in Lynx 2.x allows remote attackers to crash Lynx and possibly execute commands via a long URL in a…
CVE-2005-2929 — High (CVSS 7.5): Lynx 2.8.5, and other versions before 2.8.6dev.15, allows remote attackers to execute arbitrary commands via (1)…
CVE-2004-1617 — Medium (CVSS 5.0): Lynx, lynx-ssl, and lynx-cur before 2.8.6dev.8 allow remote attackers to cause a denial of service (infinite loop) via…
CVE-2002-1405 — Medium (CVSS 5.0): CRLF injection vulnerability in Lynx 2.8.4 and earlier allows remote attackers to inject false HTTP headers into an…
CVE-1999-0371 — Low (CVSS 1.2): Lynx allows a local user to overwrite sensitive files through /tmp symlinks.

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