CVE-2026-121606

Qihoo 360 D621-2/D603-2/D600-2/D619/D606-6/D706 Firmware Signature Verification iscm verify_sign signature verification

Published Nov 4, 2026 CVSS 4.0 · 10 Critical EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Qihoo 360 D621-2/D603-2/D600-2/D619/D606-6/D706 Firmware Signature Verification iscm verify_sign signature verification
First Time appeared Qihoo 360
Qihoo 360 d600-2
Qihoo 360 d603-2
Qihoo 360 d606-6
Qihoo 360 d619
Qihoo 360 d621-2
Qihoo 360 d706
Weaknesses CWE-345
CWE-347
CPEs cpe:2.3:a:qihoo_360:d600-2:*:*:*:*:*:*:*:*
cpe:2.3:a:qihoo_360:d603-2:*:*:*:*:*:*:*:*
cpe:2.3:a:qihoo_360:d606-6:*:*:*:*:*:*:*:*
cpe:2.3:a:qihoo_360:d619:*:*:*:*:*:*:*:*
cpe:2.3:a:qihoo_360:d621-2:*:*:*:*:*:*:*:*
cpe:2.3:a:qihoo_360:d706:*:*:*:*:*:*:*:*
Vendors & Products Qihoo 360
Qihoo 360 d600-2
Qihoo 360 d603-2
Qihoo 360 d606-6
Qihoo 360 d619
Qihoo 360 d621-2
Qihoo 360 d706
References
Metrics cvssV2_0

{'score': 10, 'vector': 'AV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:C'}

cvssV3_0

{'score': 10, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:C'}

cvssV3_1

{'score': 10, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:C'}

cvssV4_0

{'score': 10, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulDB
Published
Updated
Nov 9, 2026, 4:01 PM
Reserved
Nov 3, 2026, 4:23 PM
Status
Deferred
Published
Nov 4, 2026, 1:17 AM
Modified
Nov 9, 2026, 4:17 PM