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High CVSS 7.5

CVE-2026-21553

NVD analysis in progress

In modem, there is a possible improper input validation. This could lead to remote denial of service with no additional execution privileges needed

What this means

Exposure
Exploitable remotely over the network, without authentication and with no action from the victim.
Impact
An attacker can take the service offline.
Weakness
The application accepts input without checking it, opening the door to unintended behaviour.
Likelihood
Its EPSS score stays low: nothing points to imminent exploitation, which is no reason to leave it unpatched.

What to doFold into the next patch cycle. Start with the instances exposed to the internet.

Read automatically from the CVSS vector, the weakness type (CWE) and the EPSS score. The technical description above remains the one published by NIST.

Published
3 August 2026
CVSS
7.5 (v3.1) CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
0.4% probability of exploitation within 30 days · above 34% of all CVEs
Weakness
CWE-20
Sources
nvd
References

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