CVE-2021-20621

Name: CVE-2021-20621
Creator: NVD / NIST
Published: 2021-01-28T11:15:13.793+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 0.65%

Last modified Jun 17, 2026

CVE-2021-20621 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. Cross-site request forgery (CSRF) vulnerability in Aterm WG2600HP firmware Ver1.0.2 and earlier, and Aterm WG2600HP2 firmware Ver1.0.2 and earlier allows remote attackers to hijack the authentication of administrators via unspecified vectors.. EPSS estimates a 0.65% chance of exploitation in the next 30 days.

Description

Cross-site request forgery (CSRF) vulnerability in Aterm WG2600HP firmware Ver1.0.2 and earlier, and Aterm WG2600HP2 firmware Ver1.0.2 and earlier allows remote attackers to hijack the authentication of administrators via unspecified vectors.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

0.65%

46.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-352

Affected Software

Vendor	Product	Versions
Aterm	Wg2600hp Firmware	<= 1.0.2
Aterm	Wg2600hp2 Firmware	<= 1.0.2

References

https://jpn.nec.com/security-info/secinfo/nv21-005.htmlThird Party Advisory
https://jvn.jp/en/jp/JVN38248512/index.htmlThird Party Advisory
https://www.aterm.jp/support/tech/2019/0328.htmlPatch, Vendor Advisory
https://jpn.nec.com/security-info/secinfo/nv21-005.htmlThird Party Advisory
https://jvn.jp/en/jp/JVN38248512/index.htmlThird Party Advisory
https://www.aterm.jp/support/tech/2019/0328.htmlPatch, Vendor Advisory

Timeline

Published: Jan 28, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-20621?

How severe is CVE-2021-20621?

CVE-2021-20621 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.65% probability of exploitation in the next 30 days.

How do I fix CVE-2021-20621?

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-2021-20621?

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

Scan your code now

Source: NVD / NIST