CVE-1999-0526

NONECVSS 0.0Weaponized

0.0

An X server's access control is disabled (e.g. through an "xhost +" command) and allows anyone to connect to the server.

CVSS v3: —
EG Score: —
EPSS: 98.8%
KEV: Not listed

Published

July 1, 1997

Last Modified

April 16, 2026

References (2)

cve@mitrehttp://www.kb.cert.org/vuls/id/704969
af854a3a-2127-422b-91ae-364da2661108http://www.kb.cert.org/vuls/id/704969

Data Freshness Timeline

(refreshed 2× in last 7d / 8× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-29 13:40 UTCepss_batch
2026-05-24 16:42 UTCepss_batch
2026-05-21 22:38 UTCepss_batch
2026-05-20 22:36 UTCepss_batch
2026-05-20 11:20 UTCepss_batch
2026-05-20 11:20 UTCepss_batch
2026-05-18 21:29 UTCepss_batch
2026-05-18 21:29 UTCepss_batch

Publicly available exploits

(3 references)

Working exploit code is in the public domain (3 Metasploit modules). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

Metasploitexploit/unix/x11/x11_keyboard_exec✓ verified
First seen Jul 10, 2015
X11 Keyboard Command Injection
Open source ↗
Metasploitauxiliary/scanner/x11/open_x11✓ verified
First seen Jan 1, 1999
X11 No-Auth Scanner
Open source ↗
Metasploitauxiliary/gather/x11_keyboard_spy✓ verified
First seen Jul 1, 1997
X11 Keylogger
Open source ↗

Frequently asked(4)

What is CVE-1999-0526?

CVE-1999-0526 is a none vulnerability published on July 1, 1997. An X server's access control is disabled (e.g. through an "xhost +" command) and allows anyone to connect to the server.

When was CVE-1999-0526 disclosed?

CVE-1999-0526 was first published in the National Vulnerability Database on July 1, 1997, with the most recent update on April 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-1999-0526 actively exploited?

CVE-1999-0526 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 98.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-1999-0526?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-1999-0526, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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CVE-1999-0526

📅 Published

🔄 Last Modified

🔗 References (2)