Qihoo 360 D621-2/D603-2/D600-2/D619/D606-6/D706 Firmware Signature Verification iscm verify_sign signature verification
Summary
| CVE | CVE-2026-121606 |
|---|---|
| State | PUBLISHED |
| Assigner | VulDB |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-11-04 01:17:23 UTC |
| Updated | 2026-11-04 01:17:24 UTC |
| 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. |
Risk And Classification
Primary CVSS: v4.0 9.3 CRITICAL from [email protected]
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/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
Problem Types: CWE-345 | CWE-347 | CWE-347 Improper Verification of Cryptographic Signature | CWE-345 Insufficient Verification of Data Authenticity
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | [email protected] | Secondary | 9.3 | CRITICAL | 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/C... |
| 4.0 | CNA | DECLARED | 10 | CRITICAL | 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 |
| 3.1 | [email protected] | Primary | 10 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
| 3.1 | CNA | DECLARED | 10 | CRITICAL | 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 |
| 3.0 | CNA | DECLARED | 10 | CRITICAL | 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 |
| 2.0 | [email protected] | Secondary | 10 | AV:N/AC:L/Au:N/C:C/I:C/A:C | |
| 2.0 | CNA | DECLARED | 10 | AV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:C |
CVSS v4.0 Breakdown
Attack Vector
NetworkAttack Complexity
LowAttack Requirements
NonePrivileges Required
NoneUser Interaction
NoneConfidentiality
HighIntegrity
HighAvailability
HighSub Conf.
HighSub Integrity
HighSub Availability
HighCVSS: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/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
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
ChangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CVSS v3.0 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
ChangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:C
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Qihoo 360 | D621-2 | affected 6.4.0 | Not specified |
| CNA | Qihoo 360 | D621-2 | affected 6.4.1 | Not specified |
| CNA | Qihoo 360 | D621-2 | affected 6.4.2 | Not specified |
| CNA | Qihoo 360 | D621-2 | affected 6.4.3 | Not specified |
| CNA | Qihoo 360 | D621-2 | affected 6.4.4 | Not specified |
| CNA | Qihoo 360 | D621-2 | affected 6.4.5 | Not specified |
| CNA | Qihoo 360 | D621-2 | affected 6.4.6 | Not specified |
| CNA | Qihoo 360 | D621-2 | affected 6.4.7 | Not specified |
| CNA | Qihoo 360 | D621-2 | affected 6.4.8 | Not specified |
| CNA | Qihoo 360 | D621-2 | affected 6.4.9 | Not specified |
| CNA | Qihoo 360 | D603-2 | affected 6.4.0 | Not specified |
| CNA | Qihoo 360 | D603-2 | affected 6.4.1 | Not specified |
| CNA | Qihoo 360 | D603-2 | affected 6.4.2 | Not specified |
| CNA | Qihoo 360 | D603-2 | affected 6.4.3 | Not specified |
| CNA | Qihoo 360 | D603-2 | affected 6.4.4 | Not specified |
| CNA | Qihoo 360 | D603-2 | affected 6.4.5 | Not specified |
| CNA | Qihoo 360 | D603-2 | affected 6.4.6 | Not specified |
| CNA | Qihoo 360 | D603-2 | affected 6.4.7 | Not specified |
| CNA | Qihoo 360 | D603-2 | affected 6.4.8 | Not specified |
| CNA | Qihoo 360 | D603-2 | affected 6.4.9 | Not specified |
| CNA | Qihoo 360 | D600-2 | affected 6.4.0 | Not specified |
| CNA | Qihoo 360 | D600-2 | affected 6.4.1 | Not specified |
| CNA | Qihoo 360 | D600-2 | affected 6.4.2 | Not specified |
| CNA | Qihoo 360 | D600-2 | affected 6.4.3 | Not specified |
| CNA | Qihoo 360 | D600-2 | affected 6.4.4 | Not specified |
| CNA | Qihoo 360 | D600-2 | affected 6.4.5 | Not specified |
| CNA | Qihoo 360 | D600-2 | affected 6.4.6 | Not specified |
| CNA | Qihoo 360 | D600-2 | affected 6.4.7 | Not specified |
| CNA | Qihoo 360 | D600-2 | affected 6.4.8 | Not specified |
| CNA | Qihoo 360 | D600-2 | affected 6.4.9 | Not specified |
| CNA | Qihoo 360 | D619 | affected 6.4.0 | Not specified |
| CNA | Qihoo 360 | D619 | affected 6.4.1 | Not specified |
| CNA | Qihoo 360 | D619 | affected 6.4.2 | Not specified |
| CNA | Qihoo 360 | D619 | affected 6.4.3 | Not specified |
| CNA | Qihoo 360 | D619 | affected 6.4.4 | Not specified |
| CNA | Qihoo 360 | D619 | affected 6.4.5 | Not specified |
| CNA | Qihoo 360 | D619 | affected 6.4.6 | Not specified |
| CNA | Qihoo 360 | D619 | affected 6.4.7 | Not specified |
| CNA | Qihoo 360 | D619 | affected 6.4.8 | Not specified |
| CNA | Qihoo 360 | D619 | affected 6.4.9 | Not specified |
| CNA | Qihoo 360 | D606-6 | affected 6.4.0 | Not specified |
| CNA | Qihoo 360 | D606-6 | affected 6.4.1 | Not specified |
| CNA | Qihoo 360 | D606-6 | affected 6.4.2 | Not specified |
| CNA | Qihoo 360 | D606-6 | affected 6.4.3 | Not specified |
| CNA | Qihoo 360 | D606-6 | affected 6.4.4 | Not specified |
| CNA | Qihoo 360 | D606-6 | affected 6.4.5 | Not specified |
| CNA | Qihoo 360 | D606-6 | affected 6.4.6 | Not specified |
| CNA | Qihoo 360 | D606-6 | affected 6.4.7 | Not specified |
| CNA | Qihoo 360 | D606-6 | affected 6.4.8 | Not specified |
| CNA | Qihoo 360 | D606-6 | affected 6.4.9 | Not specified |
| CNA | Qihoo 360 | D706 | affected 6.4.0 | Not specified |
| CNA | Qihoo 360 | D706 | affected 6.4.1 | Not specified |
| CNA | Qihoo 360 | D706 | affected 6.4.2 | Not specified |
| CNA | Qihoo 360 | D706 | affected 6.4.3 | Not specified |
| CNA | Qihoo 360 | D706 | affected 6.4.4 | Not specified |
| CNA | Qihoo 360 | D706 | affected 6.4.5 | Not specified |
| CNA | Qihoo 360 | D706 | affected 6.4.6 | Not specified |
| CNA | Qihoo 360 | D706 | affected 6.4.7 | Not specified |
| CNA | Qihoo 360 | D706 | affected 6.4.8 | Not specified |
| CNA | Qihoo 360 | D706 | affected 6.4.9 | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| vuldb.com/vuln/430443/cti | [email protected] | vuldb.com | |
| gist.github.com/gajgdm6-cpu/cf98af20ddb77f27a7c112214a6280f7 | [email protected] | gist.github.com | |
| vuldb.com/submit/1023261 | [email protected] | vuldb.com | |
| vuldb.com/vuln/430443 | [email protected] | vuldb.com | |
| vuldb.com/cve/CVE-2026-121606 | [email protected] | vuldb.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: xiaomao (VulDB User) (en)
CNA: VulDB CNA Team (en)
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2026-11-03T00:00:00.000Z | Advisory disclosed |
| CNA | 2026-11-03T01:00:00.000Z | VulDB entry created |
| CNA | 2026-11-03T17:28:58.000Z | VulDB entry last update |
There are currently no legacy QID mappings associated with this CVE.