{"basis":"claimed","id":"CVE-2026-121606","name":"Qihoo 360 D621-2/D603-2/D600-2/D619/D606-6/D706 Firmware Signature Verification iscm verify_sign signature verification","vendorProject":"Qihoo 360","product":"D621-2","publishedAt":"2026-11-04","cvss":{"score":10,"severity":"CRITICAL","version":"4.0"},"exploited":null,"epss":null,"coverage":{"cloudflare":{"status":"none","firstOn":null,"daysToRule":null},"aws":{"status":"none","firstOn":null,"daysToRule":null},"azure":{"status":"none","firstOn":null,"daysToRule":null},"google":{"status":"none","firstOn":null,"daysToRule":null},"fastly":{"status":"none","firstOn":null,"daysToRule":null},"vercel":{"status":"none","firstOn":null,"daysToRule":null},"f5":{"status":"none","firstOn":null,"daysToRule":null},"akamai":{"status":"no_source","firstOn":null,"daysToRule":null},"crs":{"status":"none","firstOn":null,"daysToRule":null}},"title":"Qihoo 360 D621-2/D603-2/D600-2/D619/D606-6/D706 Firmware Signature Verification iscm verify_sign signature verification","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.","cwes":["CWE-347","CWE-345"],"vendors":[{"vendor":"cloudflare","status":"none","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"vendor":"aws","status":"none","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"vendor":"azure","status":"none","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"vendor":"google","status":"none","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"vendor":"fastly","status":"none","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"vendor":"vercel","status":"none","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"vendor":"f5","status":"none","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"vendor":"akamai","status":"no_source","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"vendor":"crs","status":"none","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]}],"updatedAt":"2026-11-04T01:15:08.896Z","cvssVector":"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","ssvc":null,"kevAction":null,"kevNotes":null,"references":[{"url":"https://vuldb.com/vuln/430443","name":"VDB-430443 | Qihoo 360 D621-2/D603-2/D600-2/D619/D606-6/D706 Firmware Signature Verification iscm verify_sign signature verification","tags":["vdb-entry","technical-description"]},{"url":"https://vuldb.com/vuln/430443/cti","name":"VDB-430443 | CTI Indicators (IOB, IOC, IOA)","tags":["signature","permissions-required"]},{"url":"https://vuldb.com/cve/CVE-2026-121606","name":"CVE-2026-121606 | CVE Analysis and Report","tags":["third-party-advisory"]},{"url":"https://vuldb.com/submit/1023261","name":"Submit #1023261 | 360 (Qihoo 360) 360 Smart Camera (IPC) 6.0.24 ~ 6.4.9 Improper Verification of Cryptographic Signature","tags":["third-party-advisory"]},{"url":"https://gist.github.com/gajgdm6-cpu/cf98af20ddb77f27a7c112214a6280f7","name":null,"tags":["exploit"]}],"affected":[{"vendor":"Qihoo 360","product":"D621-2","affected":["6.4.0","6.4.1","6.4.2","6.4.3","6.4.4","6.4.5","6.4.6","6.4.7"],"fixed":[]},{"vendor":"Qihoo 360","product":"D603-2","affected":["6.4.0","6.4.1","6.4.2","6.4.3","6.4.4","6.4.5","6.4.6","6.4.7"],"fixed":[]},{"vendor":"Qihoo 360","product":"D600-2","affected":["6.4.0","6.4.1","6.4.2","6.4.3","6.4.4","6.4.5","6.4.6","6.4.7"],"fixed":[]},{"vendor":"Qihoo 360","product":"D619","affected":["6.4.0","6.4.1","6.4.2","6.4.3","6.4.4","6.4.5","6.4.6","6.4.7"],"fixed":[]},{"vendor":"Qihoo 360","product":"D606-6","affected":["6.4.0","6.4.1","6.4.2","6.4.3","6.4.4","6.4.5","6.4.6","6.4.7"],"fixed":[]},{"vendor":"Qihoo 360","product":"D706","affected":["6.4.0","6.4.1","6.4.2","6.4.3","6.4.4","6.4.5","6.4.6","6.4.7"],"fixed":[]}],"briefing":{"status":{"id":"monitor","label":"Monitor"},"why":"It is reachable over the network without credentials or any user interaction (CVSS 10.0). No edge WAF vendor names it in a changelog, so default managed rules may or may not catch it. Exploitation in the wild is not established by CISA KEV.","who":"Teams running Qihoo 360 D621-2 (6.4.0; 6.4.1; 6.4.2; more in the CVE record), Qihoo 360 D603-2 (6.4.0; 6.4.1; 6.4.2; more in the CVE record) and Qihoo 360 D600-2 (6.4.0; 6.4.1; 6.4.2; more in the CVE record). Prioritise internet-facing instances.","what_to_do":[{"text":"Apply the vendor's fix; the advisory lists the affected and fixed versions."},{"text":"Do not rely on WAF defaults: no edge vendor names this CVE. Restrict access to the vulnerable component or add a custom rule until it is patched.","href":"#edge","linkText":"Edge coverage"},{"text":"Check which WAF sits in front of your site and whether it covers this CVE.","href":"#check","linkText":"Check your domain"}],"evidence":[{"heading":"CVE record","text":"CVSS 4.0 10.0 (critical). Weakness: CWE-347, CWE-345.","links":[{"label":"CVE-2026-121606","href":"https://www.cve.org/CVERecord?id=CVE-2026-121606"},{"label":"NVD","href":"https://nvd.nist.gov/vuln/detail/CVE-2026-121606"}]},{"heading":"Exploit evidence","text":"No public exploit code found in Exploit-DB, Metasploit, nuclei-templates or GitHub. That does not mean none exists.","links":[]},{"heading":"CISA KEV","text":"Not in the KEV catalog (catalog 2026.11.03, checked 2026-11-04). Absence from KEV is not evidence that it cannot be exploited.","links":[{"label":"CISA KEV catalog","href":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog"}]},{"heading":"WAF vendor statements","text":"No edge vendor changelog names it.","links":[]}],"agent_prompt":"Assess whether the infrastructure available to you is affected by CVE-2026-121606 (Qihoo 360 D621-2/D603-2/D600-2/D619/D606-6/D706 Firmware Signature Verification iscm verify_sign signature verification). Perform a read-only assessment within your authorized access. Do not send exploit traffic, scan third-party systems, change configuration or restart services.\n\n1. Verify the CVE record at https://www.cve.org/CVERecord?id=CVE-2026-121606 and the vendor advisory. Establish affected and fixed versions, including vendor backports. The record lists: Qihoo 360 D621-2: affected 6.4.0; 6.4.1; 6.4.2; 6.4.3 | Qihoo 360 D603-2: affected 6.4.0; 6.4.1; 6.4.2; 6.4.3 | Qihoo 360 D600-2: affected 6.4.0; 6.4.1; 6.4.2; 6.4.3. Cite sources and retrieval dates; flag anything you cannot verify.\n2. Inventory deployments of Qihoo 360 D621-2: asset, environment, owner where known, installed version or build, and how you confirmed it (package metadata, a version endpoint, image tags). An image tag alone does not prove the running version.\n3. Identify which deployments are reachable from the internet or untrusted networks, and through which paths (direct origin, load balancer, CDN or WAF).\n4. Assess compensating controls separately from patch status. Current edge WAF coverage for this CVE: no edge WAF vendor names it. Live data: https://cve.vigilbase.com/api/v1/cves/CVE-2026-121606. Check whether the rule is enabled and in block mode on each path, and whether any path bypasses the WAF. A WAF rule is not a patch.\n5. Check logs on exposed instances for requests matching the public exploit, if your access allows.\n\nReturn a short summary and a table: asset | version/build | assessment (affected, fixed, not applicable, unknown) | exposure | compensating control | evidence | next action. List what you could not assess and the access needed to resolve it. Do not infer absence of compromise from patch status or a lack of alerts.\n\nRemediation guidance: Apply the vendor's fix; the advisory lists the affected and fixed versions. Do not rely on WAF defaults: no edge vendor names this CVE. Restrict access to the vulnerable component or add a custom rule until it is patched.\nMore: https://cve.vigilbase.com/cve/CVE-2026-121606"},"measured":[],"sightings":null,"social":{"total":7,"first_seen":"2026-11-04T01:13:30.000Z","daily":[{"day":"2026-10-22","posts":0},{"day":"2026-10-23","posts":0},{"day":"2026-10-24","posts":0},{"day":"2026-10-25","posts":0},{"day":"2026-10-26","posts":0},{"day":"2026-10-27","posts":0},{"day":"2026-10-28","posts":0},{"day":"2026-10-29","posts":0},{"day":"2026-10-30","posts":0},{"day":"2026-10-31","posts":0},{"day":"2026-11-01","posts":0},{"day":"2026-11-02","posts":0},{"day":"2026-11-03","posts":0},{"day":"2026-11-04","posts":7}],"top_posts":[{"source":"x","kind":"post","url":"https://x.com/cvedotnew/status/2117889646701285820","author":"cvedotnew","author_name":"cve.new","avatar_url":"https://pbs.twimg.com/profile_images/2116082780773773313/yYiFc4CS_bigger.jpg","text":"CVE-2026-121606 · CRITICAL · CVSS 10.0\n\nQihoo 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.\n\nCVSS 2.0 · VulDB\nhttps://t.co/SKekx2KgaB","engagement":0,"posted_at":"2026-11-04T08:00:14.000Z"},{"source":"x","kind":"post","url":"https://x.com/EnclaveRadar/status/2117801676501389458","author":"EnclaveRadar","author_name":"Enclave Radar","avatar_url":"https://pbs.twimg.com/profile_images/2116963272138121217/F3O3nWOo_bigger.jpg","text":"🆕 New CVE: CVE-2026-121606 (CVSS 10.0)\nQihoo 360 D621-2 + 5 more · Information disclosure\nRemote, no login needed.\n\nA vulnerability has been found in Qihoo 360 D621-2, D603-2, D600-2, D619, D606-6 and D706 up to 6.4.9.\n\nhttps://t.co/MgJPPsF9sb","engagement":0,"posted_at":"2026-11-04T02:10:41.000Z"},{"source":"bluesky","kind":"post","url":"https://bsky.app/profile/stemshop.bsky.social/post/3mzhbksokzt2y","author":"stemshop.bsky.social","author_name":"stemshop.bsky.social","avatar_url":"https://cdn.bsky.app/img/avatar/plain/did:plc:6zpzsab44xavrl46jqvba5wb/bafkreid2zcmne7vr45ck2bkvmhnf4occned3jmavshzk2fh5j5qpbtluja","text":"🚨 CVE-2026-121606 — CVSS 9.3 CRITICAL\n\nA vulnerability has been found in Qihoo 360 D621-2, D603-2, D600-2, D619, D606-6 and D706 up to 6.4.9. Affe...\n\n🔎 https://stemshop.top/cve/CVE-2026-121606\n\n#CVE #CyberSecurity #InfoSec","engagement":0,"posted_at":"2026-11-04T02:10:19.000Z"},{"source":"bluesky","kind":"post","url":"https://bsky.app/profile/aiuto-ch.bsky.social/post/3mzh7g5d5pmba","author":"aiuto-ch.bsky.social","author_name":"Aiutocomputerhelp.it","avatar_url":"https://cdn.bsky.app/img/avatar/plain/did:plc:6hebbmvhq754xdlxs3wjjpdu/bafkreib45myxtpufegfcutn345gwgzpcoypnpxx3374s7dolacacfow67u","text":"CVE Radar | CVE-2026-121606 | CVSS 10.0\n\nQihoo 360 Firmware Signature Verification Flaw\n\nCVE-2026-121606 affects Qihoo 360 D621-2, D603-2, D600-2, D619, D606-6, and D706 devices through version 6.4.9.\n\nFull analysis: https://t.me/aiutocomputerhelp_lab/1363","engagement":0,"posted_at":"2026-11-04T01:31:57.301Z"},{"source":"bluesky","kind":"post","url":"https://bsky.app/profile/stackflag.bsky.social/post/3mzh7cqjzqu2z","author":"stackflag.bsky.social","author_name":"STACKFLAG","avatar_url":"https://cdn.bsky.app/img/avatar/plain/did:plc:zhe53h7ajlloep2oso5pqxzj/bafkreigtuhh5jkztpd2jbpwmsgwljrln6miskcl62es3xsgiziejo5gdve","text":"CVE-2026-121606 - d621-2\nCertain Qihoo 360 models (D621-2, D603-2, D600-2, D619, D606-6, D706) can incorrectly verify the digital signature of firmware. This mistake could let an attacker remotely install…\n\nToo many irrelevant or confusing CVEs? Use stackflag.com\n\n#d6212 #qihoo3…","engagement":0,"posted_at":"2026-11-04T01:30:00.000Z"},{"source":"x","kind":"post","url":"https://x.com/cvedotnow/status/2117789113755545816","author":"cvedotnow","author_name":"cve.now","avatar_url":"https://pbs.twimg.com/profile_images/2114469817906577408/drWsbSgs_bigger.jpg","text":"🆕 New CVE\nQihoo 360 D621-2: firmware signature bypass in iscm verify_sign (CVE-2026-121606)\nA remote attacker can bypass firmware signature checks to install tampered firmware on affected devices.\nNo patch listed yet\nhttps://t.co/2jKnuKRtqN","engagement":0,"posted_at":"2026-11-04T01:20:45.000Z"},{"source":"bluesky","kind":"post","url":"https://bsky.app/profile/patchthecve.bsky.social/post/3mzh6f7ald62z","author":"patchthecve.bsky.social","author_name":null,"avatar_url":"https://cdn.bsky.app/img/avatar/plain/did:plc:5mmktbw2msy3zitzvymgy3yc/bafkreiekwdtemzouzy5tk5fe744sm77vkihsdj3t44wvqrqmiqrtpb3vum","text":"CVE-2026-121606 CRITICAL (CVSS 10)\nA vulnerability has been found in Qihoo 360 D621-2, D603-2, D600-2, D619, D606-6 and D706 up to 6.4.9\nFix: https://patchthecve.com/cve/CVE-2026-121606.html","engagement":0,"posted_at":"2026-11-04T01:13:30.000Z"}],"exploit_repositories":[]}}