← Vulnerability feed

Vulnerability record · CVE-2021-38891 · published 23 November 2021

CVE-2021-38891: Ibm sterling connect\ inadequate encryption strength vulnerability

Ibm · Sterling Connect\

IBM Sterling Connect:Direct Web Services 1.0 and 6.0 uses weaker than expected cryptographic algorithms that could allow an attacker to decrypt highly sensitive information. IBM X-Force ID: 209508.

7.5 CVSS 3.1 High EPSS 0.69% · top 49.2% CWE-326 · Inadequate encryption strength
7.5CVSS 3.1 base score, v2 5.0
0.69%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

IBM Sterling Connect:Direct Web Services 1.0 and 6.0 uses weaker than expected cryptographic algorithms that could allow an attacker to decrypt highly sensitive information. IBM X-Force ID: 209508.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://exchange.xforce.ibmcloud.com/vulnerabilities/209508 VDB EntryVendor Advisory
https://www.ibm.com/support/pages/node/6518582 PatchVendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/209508 VDB EntryVendor Advisory
https://www.ibm.com/support/pages/node/6518582 PatchVendor Advisory

Track CVE-2021-38891 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.8CVE-2020-4587Ibm connect\ out-of-bounds write vulnerabilityIBM Sterling Connect:Direct for UNIX 4.2.0, 4.3.0, 6.0.0, and 6.1.0 is vulnerable to a stack based buffer ovreflow, caused by improper bounds checkin…EPSS 0.34%7.5CVE-2023-32331Ibm sterling connect\ memory buffer overflow vulnerabilityIBM Connect:Express for UNIX 1.5.0 is vulnerable to a buffer overflow that could allow a remote attacker to cause a denial of service through its bro…EPSS 0.70%7.5CVE-2021-38933Ibm sterling connect\ broken cryptographic algorithm vulnerabilityIBM Sterling Connect:Direct for UNIX 1.5 uses weaker than expected cryptographic algorithms that could allow an attacker to decrypt highly sensitive …EPSS 0.39%7.5CVE-2021-38890Ibm sterling connect\ improper restriction of authentication attempts vulnerabilityIBM Sterling Connect:Direct Web Services 1.0 and 6.0 uses an inadequate account lockout setting that could allow a remote attacker to brute force acc…EPSS 1.6%7.5CVE-2020-4767Ibm sterling connect\ out-of-bounds read vulnerabilityIBM Sterling Connect Direct for Microsoft Windows 4.7, 4.8, 6.0, and 6.1 could allow a remote attacker to cause a denial of service, caused by a buff…EPSS 1.6%7.2CVE-2025-36137Ibm sterling connect\ execution with unnecessary privileges vulnerabilityIBM Sterling Connect Direct for Unix 6.2.0.7 through 6.2.0.9 iFix004, 6.4.0.0 through 6.4.0.2 iFix001, and 6.3.0.2 through 6.3.0.5 iFix002 incorrectl…EPSS 0.33%6.7CVE-2018-1903Ibm sterling connect\ vulnerabilityIBM Sterling Connect:Direct for UNIX 4.2.0, 4.3.0, and 6.0.0 could allow a user with restricted sudo access on a system to manipulate CD UNIX to gain…EPSS 0.39%6.5CVE-2025-36063Ibm sterling connect\ insufficient session expiration vulnerabilityIBM Sterling Connect:Express Adapter for Sterling B2B Integrator 5.2.0 5.2.0.00 through 5.2.0.12 does not invalidate session after a logout which cou…EPSS 0.17%

Source: NIST National Vulnerability Database (record CVE-2021-38891), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.