CVE-1999-0821 EXPLOIT
4.6
MEDIUM · CVSS 2.0 · EPSS 0.8% (pctl 54)
Patch early
A public exploit exists.
Description
FreeBSD seyon allows local users to gain privileges by providing a malicious program in the -emulator argument.
Scoring
| CVSS | 4.6 (MEDIUM, v2.0) |
|---|---|
| Vector | AV:L/AC:L/Au:N/C:P/I:P/A:P |
| EPSS | 0.77% — more likely to be exploited than 54% of all CVEs |
| On CISA KEV | no |
| Public exploit | yes |
| Published | 1999-11-08 |
| Last modified | 2026-06-16 |
Affected (1)
| Vendor | Product |
|---|---|
| freebsd | freebsd |
Public exploits
| Source | Title | Date |
|---|---|---|
| exploit-db | Seyon 2.1 rev. 4b i586-Linux (RedHat 4.0/5.1) - Local Overflow | 2001-01-15 |
| exploit-db | FreeBSD 3.3 - Seyon SetGID Dialer | 1999-12-01 |
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