CVE-2021-25143

Name: CVE-2021-25143
Creator: NVD / NIST
Published: 2021-03-29T20:15:13.157+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.31%

Last modified Jun 17, 2026

CVE-2021-25143 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A remote denial of service (dos) vulnerability was discovered in some Aruba Instant Access Point (IAP) products in version(s): Aruba Instant 8.3.x: 8.3.0.12 and below; Aruba Instant 8.5.x: 8.5.0.9 and below; Aruba Instant 8.6.x: 8.6.0.4 and below. Aruba has released patches for Aruba Instant that address this security vulnerability.. EPSS estimates a 1.31% chance of exploitation in the next 30 days.

Description

A remote denial of service (dos) vulnerability was discovered in some Aruba Instant Access Point (IAP) products in version(s): Aruba Instant 8.3.x: 8.3.0.12 and below; Aruba Instant 8.5.x: 8.5.0.9 and below; Aruba Instant 8.6.x: 8.6.0.4 and below. Aruba has released patches for Aruba Instant that address this security vulnerability.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

1.31%

67.0th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Arubanetworks	Instant	>= 8.3.0.0, < 8.3.0.13
Arubanetworks	Instant	>= 8.5.0.0, < 8.5.0.10
Arubanetworks	Instant	>= 8.6.0.0, < 8.6.0.5
Siemens	Scalance W1750d Firmware	< 8.7.0

References

https://cert-portal.siemens.com/productcert/pdf/ssa-723417.pdfPatch, Third Party Advisory
https://www.arubanetworks.com/assets/alert/ARUBA-PSA-2021-007.txtVendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-723417.pdfPatch, Third Party Advisory
https://www.arubanetworks.com/assets/alert/ARUBA-PSA-2021-007.txtVendor Advisory

Timeline

Published: Mar 29, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-25143?

How severe is CVE-2021-25143?

CVE-2021-25143 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.31% probability of exploitation in the next 30 days.

How do I fix CVE-2021-25143?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-25143?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST