CVE-2021-20501

moderate-risk
Published 2021-04-21

IBM i 7.1, 7.2, 7.3, and 7.4 SMTP allows a network attacker to send emails to non-existent local-domain recipients to the SMTP server, caused by using a non-default configuration. An attacker could exploit this vulnerability to consume unnecessary network bandwidth and disk space, and allow remote attackers to send spam email. IBM X-Force ID: 198056.

Do I need to act?

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0.45% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
8
CVSS 8.2/10 High
NETWORK / LOW complexity

Affected Products (4)

I
I
I
I

Affected Vendors

Ibm

References (4)

VDB Entry https://exchange.xforce.ibmcloud.com/vulnerabilities/198056
Vendor Advisory https://www.ibm.com/support/pages/node/6445505
VDB Entry https://exchange.xforce.ibmcloud.com/vulnerabilities/198056
Vendor Advisory https://www.ibm.com/support/pages/node/6445505
40
/ 100
moderate-risk
Severity 28/34 · Critical
Exploitability 2/34 · Minimal
Exposure 10/34 · Low