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VulnerabilityPublished

CVE-2026-18668: IBM Sterling File Gateway · Protection Mechanism Failure

Affects IBM Sterling File GatewaySource CVE Database V5

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Not known to be exploited · CVSS 6.5 Medium.

Data as of 8 Nov 2026, 18:19 UTC

CVSS 3.1 base score
6.5Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (ibm)CVSS 3.16.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 8 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 8 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
IBMSterling File GatewayAffected
  • =6.2.1.0
Fixed in–

CPE configurations (2)

  • cpe:2.3:a:ibm:sterling_file_gateway:6.2.1.0:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:sterling_file_gateway:6.2.1.2_1:*:*:*:*:*:*:*

AI-suggested

Until a fix is available, organizations should monitor IBM's advisories for updates and consider implementing network-level protections to detect or prevent downgrade attempts.

Description

IBM Sterling File Gateway versions 6.2.1.0 through 6.2.1.2_1 and 6.2.2.0 through 6.2.2.1_1 contain a vulnerability that allows remote attackers to perform protocol downgrade attacks due to a security misconfiguration. This flaw is identified as a protection mechanism failure (CWE-693). The vulnerability has a medium severity rating with a CVSS score of 6.5.

References

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