HOMEVULNERABILITIESCVE-2021-3538
CRITICAL

CVE-2021-3538

CWE-338Published: June 2, 2021· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

A flaw was found in github.com/satori/go.uuid in versions from commit 0ef6afb2f6cdd6cdaeee3885a95099c63f18fc8c to d91630c8510268e75203009fe7daf2b8e1d60c45. Due to insecure randomness in the g.rand.Read function the generated UUIDs are predictable for an attacker.

NVD Source

Technical Analysis

CVE-2021-3538 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

satori1 product(s)
uuid
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://bugzilla.redhat.com/show_bug.cgi?id=1954376
ADVISORYhttps://github.com/satori/go.uuid/issues/73
ADVISORYhttps://snyk.io/vuln/SNYK-GOLANG-GITHUBCOMSATORIGOUUID-72488
ADVISORYhttps://bugzilla.redhat.com/show_bug.cgi?id=1954376
ADVISORYhttps://github.com/satori/go.uuid/issues/73
ADVISORYhttps://snyk.io/vuln/SNYK-GOLANG-GITHUBCOMSATORIGOUUID-72488

All References (6)

→
https://bugzilla.redhat.com/show_bug.cgi?id=1954376Issue Tracking · Third Party Advisory
→
https://github.com/satori/go.uuid/issues/73Third Party Advisory
→
https://snyk.io/vuln/SNYK-GOLANG-GITHUBCOMSATORIGOUUID-72488Third Party Advisory
→
https://bugzilla.redhat.com/show_bug.cgi?id=1954376Issue Tracking · Third Party Advisory
→
https://github.com/satori/go.uuid/issues/73Third Party Advisory
→
https://snyk.io/vuln/SNYK-GOLANG-GITHUBCOMSATORIGOUUID-72488Third Party Advisory

Quick Facts

CVE IDCVE-2021-3538
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-338
CISA KEVNo
Affected1 vendor(s)
PublishedJun 2, 2021

Related CVEs (CWE-338)

CVE-2025-59390
9.8
CVE-2015-9435
9.8
CVE-2024-40762
9.8
CVE-2025-15604
9.8
CVE-2023-36993
9.8
CVE-2021-43799
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-3538 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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