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  4. CVE 2026 121606 qihoo 360 d621 2d603 2d600 2d619d606 6d706
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Back to active CVEs
Critical · CVSS 10.0CVE-2026-121606

Qihoo 360 D621-2/D603-2/D600-2/D619/D606-6/D706 Firmware Signature Verification iscm verify_sign signature verificationCVE-2026-121606

Answer in brief

CVE-2026-121606 records a Critical severity (CVSS 10.0) vulnerability in Qihoo 360 D621-2/D603-2/D600-2/D619/D606-6/D706 Firmware Signature Verification iscm verify_sign signature verification. The current sources do not mark it as known exploited. The current feed maps Qihoo 360/D600-2 (generic), Qihoo 360/D603-2 (generic), Qihoo 360/D606-6 (generic), Qihoo 360/D619 (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Nov 4, 2026Updated Nov 4, 2026Source checked Nov 4, 2026First seen by HOL Nov 4, 2026Material review Nov 4, 2026
Upstream Advisory

Key facts

Risk
Critical · CVSS 10.0
Exploitation
Not marked as known exploited
Affected software
6 mapped packages or products
Fix availability
Not reported

Why this deserves its current priority

CVSS is 10.0. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Qihoo 360/D600-2 (generic), Qihoo 360/D603-2 (generic), Qihoo 360/D606-6 (generic), Qihoo 360/D619 (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Qihoo 360/D600-2generic6.4.0 || 6.4.1 || 6.4.2 || 6.4.3 || 6.4.4 || 6.4.5 || 6.4.6 || 6.4.7 || 6.4.8 || 6.4.9Not reported
Qihoo 360/D603-2generic6.4.0 || 6.4.1 || 6.4.2 || 6.4.3 || 6.4.4 || 6.4.5 || 6.4.6 || 6.4.7 || 6.4.8 || 6.4.9Not reported
Qihoo 360/D606-6generic6.4.0 || 6.4.1 || 6.4.2 || 6.4.3 || 6.4.4 || 6.4.5 || 6.4.6 || 6.4.7 || 6.4.8 || 6.4.9Not reported
Qihoo 360/D619generic6.4.0 || 6.4.1 || 6.4.2 || 6.4.3 || 6.4.4 || 6.4.5 || 6.4.6 || 6.4.7 || 6.4.8 || 6.4.9Not reported
Qihoo 360/D621-2generic6.4.0 || 6.4.1 || 6.4.2 || 6.4.3 || 6.4.4 || 6.4.5 || 6.4.6 || 6.4.7 || 6.4.8 || 6.4.9Not reported
Qihoo 360/D706generic6.4.0 || 6.4.1 || 6.4.2 || 6.4.3 || 6.4.4 || 6.4.5 || 6.4.6 || 6.4.7 || 6.4.8 || 6.4.9Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Qihoo 360/D600-2, Qihoo 360/D603-2, Qihoo 360/D606-6.
  2. 2Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

  1. Published upstream

    Nov 4, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Nov 4, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Nov 4, 2026

Sources and claim methodology

  • GitHub security advisorygist.github.com
  • Source referencevuldb.com
  • Source referencevuldb.com
  • Source referencevuldb.com
  • Source referencevuldb.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Qihoo 360 D603-2/D600-2/D606-6/D706 iscm testspeed_command os command injectionSame qihoo 360/d600-2 package
  • Qihoo 360 D603-2/D600-2/D606-6 Timezone Push iscm on_push_message os command injectionSame qihoo 360/d600-2 package

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-347, CWE-345
Source
CVE List V5
Source checked
Nov 4, 2026
References
5 linked sources
Open source record