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CVE-2016-6903

26
FAUCET Score

CVE-2016-6903 describes a critical vulnerability in lshell version 0.9.16, allowing remote authenticated users to bypass the restricted shell and execute arbitrary commands. With a CVSS score of 9.9, this flaw presents a severe risk, as it can be exploited over the network with low complexity and user privileges, leading to complete compromise of confidentiality, integrity, and availability. While no public exploit code or Metasploit modules are available, the vulnerability has garnered some community discussion and media coverage, indicating awareness despite not being listed on the KEV catalog or actively exploited.

Impacted Technologies

VendorProductVersion(s)CPE
0.9.16CPE matchmatch criteria
cpe:2.3:a:lshell_project:lshell:0.9.16:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.9CRITICAL

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.1
Impact Score
6.0
CvssVersion
3.0

Exploit Intelligence

EPSS Score
4.94%
Probability of exploitation in next 30 days
EPSS Percentile
91.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0494 is in the 92nd percentile among its peer group of 1,119 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.9 Bluesky, 0.5 Mastodon, and 1.6 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia nvd_reference
View patch

References

bugs.debian.org / cgi-bin/bugreport.cgi
Issue TrackingPatchThird Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingPatch
github.com / ghantoos/lshell/commit/e72dfcd1f258193f9aaea3591ecbdaed207661a0
Issue TrackingPatchThird Party Advisory
github.com / ghantoos/lshell/issues/149
Issue TrackingPatchThird Party Advisory
github.com / ghantoos/lshell/pull/153/commits/a686f71732a3d0f16df52ef46ab8a49ee0083c68
Issue TrackingPatchThird Party Advisory
openwall.com / lists/oss-security/2016/08/22/17
Mailing ListPatchThird Party Advisory
securityfocus.com / bid/92591
Third Party AdvisoryVDB Entry