CVE-2021-29726

Name: CVE-2021-29726
Creator: NVD / NIST
Published: 2022-05-17T17:15:07.903+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 0.81%

Last modified Jun 17, 2026

CVE-2021-29726 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. IBM Sterling Secure Proxy 6.0.3 and IBM Secure External Authentication Server 6.0.3 does not properly ensure that a certificate is actually associated with the host due to improper validation of certificates. IBM X-Force ID: 201104.. EPSS estimates a 0.81% chance of exploitation in the next 30 days.

Description

IBM Sterling Secure Proxy 6.0.3 and IBM Secure External Authentication Server 6.0.3 does not properly ensure that a certificate is actually associated with the host due to improper validation of certificates. IBM X-Force ID: 201104.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

0.81%

52.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-295

Affected Software

Vendor	Product	Versions
Ibm	Secure External Authentication Server	6.0.3
Ibm	Sterling Secure Proxy	6.0.3

References

https://exchange.xforce.ibmcloud.com/vulnerabilities/201104VDB Entry, Vendor Advisory
https://www.ibm.com/support/pages/node/6586754Patch, Vendor Advisory
https://www.ibm.com/support/pages/node/6586756Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/201104VDB Entry, Vendor Advisory
https://www.ibm.com/support/pages/node/6586754Patch, Vendor Advisory
https://www.ibm.com/support/pages/node/6586756Vendor Advisory

Timeline

Published: May 17, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-29726?

How severe is CVE-2021-29726?

CVE-2021-29726 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.81% probability of exploitation in the next 30 days.

How do I fix CVE-2021-29726?

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-2021-29726?

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

Scan your code now

Source: NVD / NIST