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01 Record

CVE-2026-18077

IBM i is Affected By Multiple Vulnerabilities in Simple Mail Transfer Protocol

HighPUBLISHEDCNA: ibm
CNA base score7.5 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

02 Description

IBM i is Affected By Multiple Vulnerabilities in Simple Mail Transfer Protocol

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.54% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 45.4% of scored records. A rank, not a probability.
NVD base score
7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD analysis status
Analyzed. NVD last modified this record on 2026-08-19.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-08-13 20:41Z2 MO AGO
Last updated
2026-08-18 13:22Z2 MO AGO
Reserved
2026-07-28
Assigning CNA
ibm
Record state
PUBLISHED
Severity
High (CVSS 7.5)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
Data version
5.2
Document digest
8c71d2d30665729a07bb5f2805e0bda16a43c19392bc7d3d7372b20f43ea06a1

05 Affected products

VendorProductVersionsPlatforms
IBMi7.6, 7.5, 7.4, 7.3—

06 References

07 Remediation

IBM strongly recommends addressing the vulnerability now. IBM i Release5770-TC1 PTF Number(s)PTF Download Link(s)7.6SJ11061 SJ11131 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11061 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11131 7.5SJ11074 SJ11129 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11074 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11129 7.4SJ11083 SJ11127 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11083 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11127 7.3SJ11084 SJ11123 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11084 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11123 https://www.ibm.com/mysupport/s/fix-information IBM recommends users running unsupported versions of affected products upgrade to a supported and fixed version of affected products.