CVE-2020-29390

9.8 criticalEPSS 40%

Critical (9.8) in zeroshell zeroshell. EPSS 40% chance of exploitation in the next 30 days.

Zeroshell 3.9.3 contains a command injection vulnerability in the /cgi-bin/kerbynet StartSessionSubmit parameter that could allow an unauthenticated attacker to execute a system command by using shell metacharacters and the %0a character.

Severity

CVSS 3.1

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 40% chance of exploitation in the next 30 days; higher than 98% of CVEs (scores of 2026-10-31)
CWE: CWE-78
Published: 2020-11-30
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

zeroshell:zeroshell

References

https://blog.quake.so/post/zeroshell_linux_router_rce/
https://blog.quake.so/post/zeroshell_linux_router_rce/

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