CVE-2016-6903

lshell 0.9.16 allows remote authenticated users to break out of a limited shell and execute arbitrary commands.

Published: 2017-04-24 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2016-6903 is rated High Risk (74.3/100): CVSS Critical severity, with high exploitation likelihood (EPSS 4.94%, 91th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +2.84% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2016-6903

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 2.10% 4.94% +2.84%
2 2026-03-28 1.87% 2.10% +0.23%
3 2025-03-30 — 1.87% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2016-6903

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.9 3.0 CRITICAL
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.1 6.0 [email protected]
9.0 2.0 HIGH
AV:N/AC:L/Au:S/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 8.0 10.0 [email protected]

Weakness enumeration for CVE-2016-6903

OS Trackers for CVE-2016-6903

vendor priority summary link
ubuntu medium CVE-2016-6903 medium priority: Ubuntu including 1 source packages (lshell), 21 status rows across 21 suites (artful, bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, mantic, noble, oracular, plucky, precise, questing, trusty, upstream, xenial, yakkety, zesty): DNE 16, ignored 3, needed 1, needs-triage 1. https://ubuntu.com/security/CVE-2016-6903

Affected software / configurations for CVE-2016-6903

Vendor Product Version Raw CPE
lshell_project lshell 0.9.16 cpe:2.3:a:lshell_project:lshell:0.9.16:*:*:*:*:*:*:*

References for CVE-2016-6903

cvelogic Threat Intelligence