Medium severity · published Aug 27, 2026
CVE-2026-59293
SMB minimum protocol dialect defaults to SMB1
6.6
CVSS
0.2%
EPSS
No
On KEV
Description
Unless the application explicitly raises smbMinVersion, the jCIFS client will negotiate down to SMB1/CIFS, which lacks mandatory signing/encryption and is vulnerable to NTLM relay and content-tampering MITM.
Spring Integration 7.1.0
Spring Integration 7.0.0 - 7.0.5
Spring Integration 6.5.0 - 6.5.10
Spring Integration 6.4.0 - 6.4.12
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 15% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SI
Spring Integration · Spring
7.1.0; 7.0.0 through 7.0.5; 6.5.0 through 6.5.10; 6.4.0 through 6.4.12 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-59293
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-59293
Vendor Advisory
https://spring.io/security/cve-2026-59293
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