CVE-2026-19396
ASUS Router IFTTT Pairing Token Predictable Seed Vulnerability
Description
A predictable seed in the pseudo-random number generator (PRNG) in the IFTTT pairing token generation of the ASUS RT-BE57 router allows an unauthenticated nearby user to derive the pairing token and read or modify router settings via observed values from an administrator-initiated IFTTT pairing session.Refer to the ' Security Update for ASUS Router Firmware ' section on the ASUS Security Advisory for more information.
INFO
Published Date :
Oct. 7, 2026, 2:16 a.m.
Last Modified :
Oct. 7, 2026, 2:16 a.m.
Remotely Exploit :
No
Source :
54bf65a7-a193-42d2-b1ba-8e150d3c35e1
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 4.0 | HIGH | 54bf65a7-a193-42d2-b1ba-8e150d3c35e1 | ||||
| CVSS 4.0 | HIGH | 54bf65a7-a193-42d2-b1ba-8e150d3c35e1 |
Solution
- Update the ASUS router firmware.
- Apply ASUS security advisory updates.
- Ensure PRNG uses a strong, unpredictable seed.
- Monitor router pairing activity.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-19396.
| URL | Resource |
|---|---|
| https://www.asus.com/security-advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-19396 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-19396
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-19396 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-19396 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 54bf65a7-a193-42d2-b1ba-8e150d3c35e1
Oct. 07, 2026
Action Type Old Value New Value Added Description A predictable seed in the pseudo-random number generator (PRNG) in the IFTTT pairing token generation of the ASUS RT-BE57 router allows an unauthenticated nearby user to derive the pairing token and read or modify router settings via observed values from an administrator-initiated IFTTT pairing session.Refer to the ' Security Update for ASUS Router Firmware ' section on the ASUS Security Advisory for more information. Added CVSS V4.0 AV:A/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/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 Added CWE CWE-337 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/19xxx/CVE-2026-19396.json">CVE-2026-19396</a> Added Reference https://www.asus.com/security-advisory