CVE-2021-28100

Local information disclosure via world-readable temporary files

Published Mar 23, 2021 · Updated Aug 3, 2024

Local information disclosure in Netflix Priam allows local users to read sensitive data from world-readable temporary files. The MetaData, DoubleRing, and PostRestoreHook paths call File.createTempFile without restricting its default -rw-r--r-- mode. A local user needs filesystem read access; the flaw exposes contents written by Priam but does not permit modification.

CVSS severity5.5
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Local information disclosure in Netflix Priam allows local users to read sensitive data from world-readable temporary files. The MetaData, DoubleRing, and PostRestoreHook paths call File.createTempFile without restricting its default -rw-r--r-- mode. A local user needs filesystem read access; the flaw exposes contents written by Priam but does not permit modification.

The record

CVE
CVE-2021-28100
Published
Mar 23, 2021
Updated
Aug 3, 2024
Vendor
Netflix
Product
Priam
Classifications
CWE-377, T1005
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Mar 23, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=All versions

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Netflix · Priamversion=All versions

Published CVSS scores

6.2GitHub Advisory DatabaseCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
2.1NIST NVDAV:L/AC:L/Au:N/C:P/I:N/A:N
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-377Insecure Temporary File
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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