CVE-2021-27372

Name: CVE-2021-27372
Creator: NVD / NIST
Published: 2021-03-25T22:15:12.917+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.64%

Last modified Jun 17, 2026

CVE-2021-27372 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Realtek xPON RTL9601D SDK 1.9 stores passwords in plaintext which may allow attackers to possibly gain access to the device with root permissions via the build-in network monitoring tool and execute arbitrary commands.. EPSS estimates a 1.64% chance of exploitation in the next 30 days.

Description

Realtek xPON RTL9601D SDK 1.9 stores passwords in plaintext which may allow attackers to possibly gain access to the device with root permissions via the build-in network monitoring tool and execute arbitrary commands.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

1.64%

73.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-522

Affected Software

Vendor	Product	Versions
Realtek	Xpon Rtl9601d Software Development Kit	1.9

References

https://www.realtek.com/images/safe-report/RTL9601D_CVE-2021-27372.pdfVendor Advisory
https://www.realtek.com/images/safe-report/RTL9601D_CVE-2021-27372.pdfVendor Advisory

Timeline

Published: Mar 25, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-27372?

How severe is CVE-2021-27372?

CVE-2021-27372 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.64% probability of exploitation in the next 30 days.

How do I fix CVE-2021-27372?

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-2021-27372?

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

Scan your code now

Source: NVD / NIST