Qihoo 360 D621-2/D603-2/D600-2/D619/D606-6/D706 Firmware Signature Verification iscm verify_sign signature verification
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
- Exploited
- No known exploitation
- Fix
- No fix listed
- Who is exposed
- Not reported
Do first: Workaround: No fix is available in the facts provided. Limit exposure by keeping the camera off untrusted networks and making sure it is not reachable from networks where an attacker could intercept its plaintext HTTP update traffic.
- Exploitation?/40Exploitation: unknown (data gap). No CISA SSVC exploitation rating yet
- Exposure17/25No login or user action needed, reachable over the network without a login · Data gap: Advisories don't say whether default setups are affected
- Reach?/20Reach: unknown (data gap). No tracked technology or package matched
- Severity10/10CVSS 10.0
- No patch5/5No patch listed yet
What would change the score
- Would score about 77 if added to CISA KEV
- Would score about 72 if CISA's SSVC rates exploitation active
- Would score about 37 if advisories confirm default setups are exposed
CVE-2026-121606 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 10.0 (critical) and affects D621-2, D603-2, D600-2 and 3 more; no fixed version is listed yet.
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- Published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- FIRST's estimate of the chance attackers exploit it in the next 30 days, updated daily.What do these mean? →
- 0.24% · 15th percentile
- A 0-100 score for how much a CVE matters across the industry: exploitation, exposure, how widely the software is used, severity and whether a fix exists.What do these mean? →
- 32/100 · provisional
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Unclear
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
Qihoo 360 D621-2, D603-2, D600-2, D619, D606-6, and D706 router firmware contains a flaw in its firmware signature verification that can allow improperly verified firmware to be accepted as legitimate. An attacker could exploit this remotely to bypass signature checks, potentially installing unauthorized or tampered firmware on affected devices.
Read the original 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.
What to do
Workaround: No fix is available in the facts provided. Limit exposure by keeping the camera off untrusted networks and making sure it is not reachable from networks where an attacker could intercept its plaintext HTTP update traffic.
Timeline
- CVE published
- First seen by cve.now
- Posted on X by cve.now
Affected versions
- Qihoo 360 D621-2
6.4.0, 6.4.1, 6.4.2, 6.4.3, 6.4.4, 6.4.5, 6.4.6, 6.4.7, 6.4.8, 6.4.9
- Qihoo 360 D603-2
6.4.0, 6.4.1, 6.4.2, 6.4.3, 6.4.4, 6.4.5, 6.4.6, 6.4.7, 6.4.8, 6.4.9
- Qihoo 360 D600-2
6.4.0, 6.4.1, 6.4.2, 6.4.3, 6.4.4, 6.4.5, 6.4.6, 6.4.7, 6.4.8, 6.4.9
- Qihoo 360 D619
6.4.0, 6.4.1, 6.4.2, 6.4.3, 6.4.4, 6.4.5, 6.4.6, 6.4.7, 6.4.8, 6.4.9
- Qihoo 360 D606-6
6.4.0, 6.4.1, 6.4.2, 6.4.3, 6.4.4, 6.4.5, 6.4.6, 6.4.7, 6.4.8, 6.4.9
- Qihoo 360 D706
6.4.0, 6.4.1, 6.4.2, 6.4.3, 6.4.4, 6.4.5, 6.4.6, 6.4.7, 6.4.8, 6.4.9
Evidence 5
- Advisory
- Advisory
- Advisory
- Advisory
- Exploit
Corrections
None so far.
Something wrong on this page? Report an error. Every fix is listed here.
Questions about CVE-2026-121606
Is CVE-2026-121606 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data
What does this mean?
The camera's firmware update check does not properly verify the signature on new firmware. An attacker who can intercept the update or control the push channel can install unsigned firmware that keeps running on the device.Source: gist.github.com
Which versions are affected by CVE-2026-121606?
D621-2: versions 6.4.0, 6.4.1, 6.4.2, 6.4.3, 6.4.4 and 5 more. D603-2: versions 6.4.0, 6.4.1, 6.4.2, 6.4.3, 6.4.4 and 5 more. D600-2: versions 6.4.0, 6.4.1, 6.4.2, 6.4.3, 6.4.4 and 5 more. D619: versions 6.4.0, 6.4.1, 6.4.2, 6.4.3, 6.4.4 and 5 more. D606-6: versions 6.4.0, 6.4.1, 6.4.2, 6.4.3, 6.4.4 and 5 more. 1 more package is listed on the page.Source: cve.now feed data
Am I affected, and how do I check?
The advisory lists Qihoo 360 Smart Camera firmware versions 6.0.24 through 6.4.9 on the D621-2, D603-2, D600-2, D619, D606-6 and D706 models (MIPS Ingenic JZ series). To check, compare the firmware version shown in the camera's settings or app against that range and confirm the model name on the device.Source: gist.github.com
How do I fix CVE-2026-121606?
No fixed firmware version is listed in the available facts. Check the vendor's site for an update to a release above 6.4.9 and install it once it is published.Source: gist.github.com
What if there's no patch?
No fix is available in the facts provided. Limit exposure by keeping the camera off untrusted networks and making sure it is not reachable from networks where an attacker could intercept its plaintext HTTP update traffic.Source: gist.github.com