CVE-2026-4478CWE-345CWE-347

Yi Technology YI Home Camera HTTP Firmware Update ipc signature verification

Critical · published March 20, 2026

CVSS v4.0
9.2
EPSS
0%
Percentile
22.4
In the wild
Unconfirmed
What it is

A vulnerability was identified in Yi Technology YI Home Camera 2 2.1.1_20171024151200. This impacts an unknown function of the file home/web/ipc of the component HTTP Firmware Update Handler. The manipulation leads to improper verification of cryptographic signature. The attack is possible to be carried out remotely. The complexity of an attack is rather high. The exploitability is said to be difficult. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.

The record
Technical detail
CVSS v4.0
9.2 · CRITICAL
Vector
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
EPSS
0.00307 · 22.4th percentile
Weaknesses
CWE-345 · Insufficient Verification of Data Authenticity; CWE-347 · Improper Verification of Cryptographic Signature
Published
2026-03-20T07:02Z
EPSS history
Timeline
  • 20 MAR 07:02Z
    Yi Technology YI Home Camera HTTP Firmware Update ipc signature verification
    cvelistv5