How severe is CVE-2026-19396?

CVE-2026-19396 has a CVSS 4.0 base score of 7.7, rated high severity.

Is CVE-2026-19396 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-19396?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2026-19396 published?

CVE-2026-19396 was published on 2026-10-07.

CVE-2026-19396

CVE-2026-19396 is a high-severity vulnerability with a CVSS 4.0 base score of 7.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-337.

Key facts

Severity: High (CVSS 4.0 base score 7.7)
EPSS exploit prediction: 0% (2nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-337
Published: 2026-10-07
Last modified: 2026-10-07

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.

Frequently asked questions

What is CVE-2026-19396?: 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.
How severe is CVE-2026-19396?: CVE-2026-19396 has a CVSS 4.0 base score of 7.7, rated high severity.
Is CVE-2026-19396 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-19396?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2026-19396 published?: CVE-2026-19396 was published on 2026-10-07.

References

https://www.asus.com/security-advisory

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