CVE-2026-28520

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.19% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 9.2% of scored records. A rank, not a probability.

NVD base score

8.6 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-03-15 13:35Z7 MO AGO

Last updated

2026-03-16 14:20Z7 MO AGO

Reserved

2026-02-27

Assigning CNA

VulnCheck

Record state

PUBLISHED

Severity

High (CVSS 8.6)

CNA CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Weaknesses

• CWE-193Off-by-one ErrorBase

Data version

5.2

Document digest

d593016d4f5028d426a4a1fc98e459916ae080925447d48cc2978f60288cea8c

• src.tuya.comTuya SRC Security Advisoryhttps://src.tuya.com/announcement/32vendor-advisory
• github.comarduino-TuyaOpen GitHub Repositoryhttps://github.com/tuya/arduino-TuyaOpenproduct
• www.vulncheck.comVulnCheck Advisory: arduino-TuyaOpen WiFiMulti Single-Byte Buffer Overflow Remote Code Executionhttps://www.vulncheck.com/advisories/arduino-tuyaopen-wifimulti-single-byte-buffer-overflow-remote-code-executionthird-party-advisory