CVE-1999-0526An X server's access control is disabled (e.g. through an "xhost +" command) and allows anyone to connect to the server.
- 10.0HighCVSS base score
- 20.8%Exploitation in 30 daysEPSS · top 2.4% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- 3Public exploitsMetasploit, Nuclei and Exploit-DB
Description
An X server's access control is disabled (e.g. through an "xhost +" command) and allows anyone to connect to the server.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. The public collections list 3 Metasploit modules for it.
Show the exploits3
Metasploit modules3 modules
- X11 Keyboard Command Injection (Metasploit module) (opens in a new tab)
exploit/unix/x11/x11_keyboard_execRank excellentdisclosed 10 Jul 2015
- X11 Keylogger (Metasploit module) (opens in a new tab)
auxiliary/gather/x11_keyboard_spyRank normaldisclosed 1 Jul 1997
- X11 No-Auth Scanner (Metasploit module) (opens in a new tab)
auxiliary/scanner/x11/open_x11Rank normal
Modules, templates and exploits as listed by the Metasploit Framework (BSD-3-Clause), ProjectDiscovery's Nuclei templates (MIT) and the Exploit Database (GPLv2), read once a day. Where the data comes from
Timeline
ID reserved
By mitre
- 4 months later
· 4 months later
Published
- 25 years later
· 25 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | High10.0 | AV:N/AC:L/Au:N/C:C/I:C/A:C |
- EPSS (exploitation in 30 days)
- 20.8% · top 2.4% of all CVEs (14 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 10.0.
Affected products
n/a
- affected n/a
References
References1
- VU#704969 (opens in a new tab)third-party-advisoryx_refsource_CERT-VNx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-1999-0524 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-1999-0526)Record last updated .