CVE-2020-4320

mediumpriority · track · 26EPSS 0.007 · 54 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.72% (54th) EPSS

CVSS 4 · medium

Is it mine?

14 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-27

IBM MQ Appliance and IBM MQ AMQP Channels 8.0, 9.0 LTS, 9.1 LTS, and 9.1 CD do not correctly block or allow clients based on the certificate distinguished name SSLPEER setting. IBM X-Force ID: 177403.

cvss

Technical severity, 0–10. One row per scoring source.

6.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.04mediumAV:N/AC:L/Au:S/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 8 · impact 2.9

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 2.8 · impact 3.6

v3.05.3mediumCVSS:3.0/AV:N/I:N/AC:H/S:U/PR:L/A:H/C:N/UI:N/RC:C/RL:O/E:Usecondary · ENISA EU

v3.05.3mediumCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:Hsecondary · psirt@us.ibm.com USexploitability 1.6 · impact 3.6

v3.16mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-295USprimary

affected products (14)

Products and version ranges known to be affected.

IBM MQ 8.0all versionscert_bundDEcpe:/a:ibm:mq:8.0
IBM MQ 9.0 LTSall versionscert_bundDEcpe:/a:ibm:mq:9.0_lts
IBM MQ 9.1 CDall versionscert_bundDEcpe:/a:ibm:mq:9.1_cd
IBM MQ 9.1 LTSall versionscert_bundDEcpe:/a:ibm:mq:9.1_lts
IBM WebSphere MQ 7.1all versionscert_bundDEcpe:/a:ibm:websphere_mq:7.1
IBM WebSphere MQ 7.5all versionscert_bundDEcpe:/a:ibm:websphere_mq:7.5
IBM MQ≤ 8.0enisa_euvdEU
IBM MQ≤ 9.1.CDenisa_euvdEU
IBM MQ≤ 9.0.LTSenisa_euvdEU
IBM MQ≤ 9.1.LTSenisa_euvdEU
ibm mq8.0.0.0 → 8.0.0.15nvdUScpe:2.3:a:ibm:mq:*:*:*:*:*:*:*:*
ibm mq9.0.0.0 → 9.0.0.10nvdUScpe:2.3:a:ibm:mq:*:*:*:*:*:*:*:*
ibm mq9.1.0 → 9.1.5nvdUScpe:2.3:a:ibm:mq:*:*:*:*:*:*:*:*
ibm mq9.1.0.0 → 9.1.0.5nvdUScpe:2.3:a:ibm:mq:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2023-1824IBM MQ: Mehrere Schwachstellen ermöglichen Denial of ServiceDeutsch2020-06-16csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in IBM MQ und IBM WebSphere MQ ausnutzen, um einen Denial of Service Angriff durchzuführen.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund nvd NVD CVE.org MITRE

published 2020-06-16modified 2026-06-17

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+1889 more

references (12)

External citations — patches, advisories, analysis.

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