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CVE-1999-0817

25
FAUCET Score

CVE-1999-0817 describes a critical vulnerability in the Lynx WWW client, specifically affecting versions from the University of Kansas. This flaw allows a remote attacker to inject arbitrary command-line parameters when Lynx invokes external programs for handling protocols like telnet. With a CVSS score of 10.0, this vulnerability is highly severe due to its network-based attack vector, low complexity, and complete compromise of confidentiality, integrity, and availability. Despite its age and severity, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:a:university_of_kansas:lynx:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

10.0HIGH

AV:N/AC:L/Au:N/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
3.10%
Probability of exploitation in next 30 days
EPSS Percentile
86.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0310 is in the 76th percentile among its peer group of 51,553 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

microsoftpatch availablevia msrc
Product: cbl2 lynx 2.9.0~dev.9-5 on CBL Mariner 2.0Fixed in: 2.9.0~dev.9-5
microsoftpatch availablevia msrc
Product: 16881-16823Fixed in: 2.9.0~dev.9-5

Vendor Advisories (1)

microsoft2000-Jan/CVE-1999-0817Critical

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.

Jan 2, 2000

References

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