HOMEVULNERABILITIESCVE-2021-47942
HIGH

CVE-2021-47942

CWE-22Published: May 16, 2026· Updated: May 18, 2026

7.5
CVSS v3.1
EPSS:0.13%probability of exploitation in 30 daysPercentile:31.9th

Official Description

Home Assistant Community Store (HACS) 1.10.0 contains a path traversal vulnerability that allows unauthenticated attackers to read sensitive files by traversing directories via the /hacsfiles/ endpoint. Attackers can retrieve the .storage/auth file containing user credentials and refresh tokens, then craft valid JWT tokens to gain administrative access to Home Assistant instances.

NVD Source

Technical Analysis

CVE-2021-47942 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), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

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

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.

All References (4)

→
https://github.com/hacs/integration
→
https://www.exploit-db.com/exploits/49495
→
https://www.home-assistant.io/
→
https://www.vulncheck.com/advisories/home-assistant-community-store-path-traversal-account-takeover

Quick Facts

CVE IDCVE-2021-47942
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-22
CISA KEVNo
EPSS (30d)0.13%
PublishedMay 16, 2026

Related CVEs (CWE-22)

CVE-2026-41211
10.0
CVE-2026-2731
10.0
CVE-2026-48282
KEV10.0
CVE-2026-54917
10.0
CVE-2026-34909
KEV10.0
CVE-2026-11420
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-47942 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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