Signal is active with 2 mentions in latest observed window
Recommended action window: Monitor and triage in normal cycle
NVD description
A vulnerability has been found in Qihoo 360 D621-2, D603-2, D600-2, D619, D606-6 and D706 up to 6.4.9. Affected by this issue is the function verify_sign of the file fs2/bin/iscm of the component Firmware Signature Verification. Such manipulation of the argument sign leads to improper verification of cryptographic signature. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
NONE
Momentum
NONE
CVE-2026-121606 · CRITICAL · CVSS 10.0 Qihoo 360 devices D621-2, D603-2, D600-2, D619, D606-6, and D706 up to version 6.4.9 have a vulnerability in the verify_sign function, allowing improper verification of cryptographic signatures. CVSS 2.0 · VulDB https://cve.new/CVE-2026-121606
🆕 New CVE Qihoo 360 D621-2: firmware signature bypass in iscm verify_sign (CVE-2026-121606) A remote attacker can bypass firmware signature checks to install tampered firmware on affected devices. No patch listed yet https://cve.now/CVE-2026-121606?utm_source=x&utm_medium=social&utm_campaign=cvedotnow&utm_content=critical