Critical severity · published Sep 18, 2026
CVE-2026-75878
IBM Sterling File Gateway is Vulnerable to Authentication Bypass
9.1
CVSS
0.6%
EPSS
No
On KEV
Description
IBM Sterling File Gateway could allow a remote attacker to bypass authentication and obtain a fully authenticated session due to improper authentication via an unvalidated SSO header.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 51% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SF
Sterling File Gateway · IBM
6.2.0.0 through 6.2.0.6_1, 6.2.1.0 - 6.2.1.2, 6.2.2.0 - 6.2.2.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-75878
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-75878
www.ibm.com
https://www.ibm.com/support/pages/node/7287497
More from Sterling File Gateway
8.8
CVE-2021-20489
IBM Sterling File Gateway 2.2.0.0 through 6.1.1.0 is vulnerable to cross-site request forgery which could allow an attacker to execute malicious and unauthorized actions…
8.8
CVE-2020-4647
IBM Sterling File Gateway 2.2.0.0 through 2.2.6.5 and 6.0.0.0 through 6.0.3.2 is vulnerable to SQL injection
8.1
CVE-2026-7769
SQL injection Security Vulnerability in IBM Sterling B2B Integrator and IBM Sterling File Gateway
8.1
CVE-2014-0927
The ActiveMQ admin user interface in IBM Sterling B2B Integrator 5.1 and 5.2 and Sterling File Gateway 2.1 and 2.2 allows remote attackers to bypass authentication by leveraging…
7.8
CVE-2017-1544
IBM Sterling B2B Integrator Standard Edition (IBM Sterling File Gateway 2.2.0 through 2.2.6) caches usernames and passwords in browsers that could be used by a local attacker to…