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CVE-2018-7169

20
FAUCET Score

CVE-2018-7169 is a medium-severity vulnerability affecting the shadow_project shadow utility, specifically the newgidmap component. It allows an unprivileged user to manipulate supplementary group memberships within a user namespace, potentially bypassing "group blacklisting" access controls on filesystem paths. The vulnerability has a CVSS score of 5.3, indicating a network-based attack with low complexity and a low impact on confidentiality. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
4.5CPE matchmatch criteria
cpe:2.3:a:shadow_project:shadow:4.5:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.60%
Probability of exploitation in next 30 days
EPSS Percentile
73.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0160 is in the 57th percentile among its peer group of 23,701 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Remediation

Vendor Advisories (1)

redhatCVE-2018-7169Moderate

shadow-utils: newgidmap allows unprivileged user to drop supplementary groups potentially allowing privilege escalation

Nov 14, 2017

References

bugs.launchpad.net / ubuntu/+source/shadow/+bug/1729357
ExploitIssue TrackingThird Party Advisory
security.gentoo.org / glsa/201805-09
Third Party Advisory