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CVE-2020-28169

33
FAUCET Score

CVE-2020-28169 describes a privilege escalation vulnerability in the td-agent-builder plugin for Fluentd, affecting Debian and Windows systems. An attacker with low privileges can exploit insecure directory permissions to execute arbitrary code as NT AUTHORITY\SYSTEM. This high-severity vulnerability (CVSS 7.0) has a high impact on confidentiality, integrity, and availability, but requires high attack complexity. While there is no evidence of active exploitation, a public exploit (EDB-49363) exists, though community discussion and media coverage are minimal.

Impacted Technologies

VendorProductVersion(s)CPE
< 2020-12-18CPE matchmatch criteria
cpe:2.3:a:td-agent-builder_project:td-agent-builder:*:*:*:*:*:fluentd:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.0HIGH

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

Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.0
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.17%
Probability of exploitation in next 30 days
EPSS Percentile
64.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
ExploitDB: EDB-49363 · Jan 5, 2021
This CVE's current EPSS score of 0.0117 is in the 92nd percentile among its peer group of 1,516 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.4 InfoSec Media, 0.1 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

packetstormsecurity.com / files/160791/Fluentd-TD-agent-4.0.1-Insecure-Folder-Permission.html
ExploitThird Party AdvisoryVDB Entry
docs.fluentd.org / installation/install-by-msi
ProductVendor Advisory
github.com / fluent/fluentd/issues/3201
ExploitIssue TrackingThird Party Advisory
github.com / fluent-plugins-nursery/td-agent-builder/pull/247/commits/6f9cb6393392d62caa99907c0ebbcbab6b94a3f1
PatchThird Party Advisory
github.com / kenhys/td-agent-builder/commit/eec6e2dedf12f2e0c01c2bbe7b8c15b639b3b938
PatchThird Party Advisory
td-agent-package-browser.herokuapp.com / 4/windows
Third Party Advisory
debian.org / security/2021/dsa-4949
Third Party Advisory
fluentd.org
Vendor Advisory