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CVE-2025-63666VulnerabilityPublished Updated

CVE-2025-63666: n/a

Source CVE Database V5

0

Not known to be exploited · CVSS 9.8 Critical.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 3.1 base score
9.8Critical
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.4% chance of exploitation in 30 days – higher than 42% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 12 Nov 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.

What to do

AI-suggested

1. Immediately isolate Tenda AC15 routers from untrusted networks and restrict management interfaces to trusted internal networks only. 2. Disable remote management features and any unnecessary services on the affected routers to reduce exposure. 3. Implement network segmentation to limit attacker movement if a device is compromised. 4. Deploy web application firewalls or intrusion detection systems to monitor and block suspicious cookie replay or session hijacking attempts. 5. Educate users and administrators about the risks of executing untrusted JavaScript in browsers connected to the network. 6. Regularly audit router configurations and logs for signs of unauthorized access or anomalous activity. 7. Monitor vendor communications for firmware updates or patches and apply them promptly once available. 8. Consider replacing vulnerable devices with models that have a stronger security posture if immediate patching is not feasible.

Description

Tenda AC15 v15.03.05.18_multi) issues an authentication cookie that exposes the account password hash to the client and uses a short, low-entropy suffix as the session identifier. An attacker with network access or the ability to run JS in a victim browser can steal the cookie and replay it to access protected resources.

References

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