HOMEVULNERABILITIESCVE-2026-28521
HIGH

CVE-2026-28521

CWE-125Published: March 16, 2026· Updated: Mar 17, 2026

7.7
CVSS v3.1
EPSS:0.01%probability of exploitation in 30 daysPercentile:1.5th

Official Description

arduino-TuyaOpen before version 1.2.1 contains an out-of-bounds memory read vulnerability in the TuyaIoT component. An attacker who hijacks or controls the Tuya cloud service can issue malicious DP event data to victim devices, causing out-of-bounds memory access that may result in information disclosure or a denial-of-service condition.

NVD Source

Technical Analysis

CVE-2026-28521 requires local access, meaning attackers must already have a foothold on the target system.

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), availability disruption (denial of service), with a CVSS base score of 7.7.

CVSS v3.1 Vector Breakdown

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

Affected Vendors & Products

tuya1 product
arduino-tuyaopen
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://src.tuya.com/announcement/32
ADVISORYhttps://www.vulncheck.com/advisories/arduino-tuyaopen-tuyaiot-out-of-bounds-memory-read-information-disclosure

All References (3)

→
https://github.com/tuya/arduino-TuyaOpenProduct
→
https://src.tuya.com/announcement/32Vendor Advisory
→
https://www.vulncheck.com/advisories/arduino-tuyaopen-tuyaiot-out-of-bounds-memory-read-information-disclosureThird Party Advisory

Quick Facts

CVE IDCVE-2026-28521
CVSS Score7.7 / 10
SeverityHIGH
WeaknessCWE-125
CISA KEVNo
EPSS (30d)0.01%
Affected1 vendor
PublishedMar 16, 2026

Related CVEs (CWE-125)

CVE-2026-34987
9.9
CVE-2026-33642
9.8
CVE-2026-24213
9.8
CVE-2026-42799
9.8
CVE-2025-15646
9.8
CVE-2026-14416
9.6

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-28521 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.
← All Vulnerabilities·Search for CVE-2026-28521·NVD