CVE-2023-50310: IBM CICS Transaction Gateway for Multiplatforms 9.2 and 9.3 transmits or stores authentication credentials, bu

Routine

MEDIUM 4.9DOWNGRADE

CVE-2023-50310 is a medium-severity flaw (CVSS 4.9) affecting cics transaction gateway. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

IBM CICS Transaction Gateway for Multiplatforms 9.2 and 9.3 transmits or stores authentication credentials, but it uses an insecure method that is susceptible to unauthorized interception and/or retrieval.

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	4.9 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.4% (top 66%)
CISA exploited list	No
Weakness	CWE-522
Published	2024-10-23
Last modified	2026-06-17

Publisher (CNA): IBM Corporation · Vendor: ibm

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-10-23 11:15 UTCPublished CVE record published
2026-06-17 06:39 UTCUpdated Record last modified

ibm cics transaction gateway DOWNGRADE

Affected: 9.2 · 9.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 9.2

1. Check installed version

apt-cache policy cics-transaction-gateway || rpm -q cics-transaction-gateway || cics-transaction-gateway --version

2. No fixed release: DOWNGRADE to a release before 9.2 (Debian / Ubuntu)

apt-cache madison cics-transaction-gateway sudo apt install cics-transaction-gateway=<VERSION_BEFORE_9.2> sudo apt-mark hold cics-transaction-gateway

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list cics-transaction-gateway sudo dnf downgrade cics-transaction-gateway-<VERSION_BEFORE_9.2> sudo dnf versionlock add cics-transaction-gateway

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-50310?

cics transaction gateway: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-50310 being exploited?

CVE-2023-50310 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-50310 affect?

CVE-2023-50310 affects cics transaction gateway. Severity is medium (CVSS 4.9). IBM CICS Transaction Gateway for Multiplatforms 9.2 and 9.3 transmits or stores authentication credentials, but it uses an insecure method that is susceptible to unauthorized interception and/or retrieval.

How urgent is CVE-2023-50310?

Priority 26/100. No elevated risk signals yet.

Related CVEs

CVE-2026-0977 MEDIUM 5.1 DOWNGRADE IBM CICS Transaction Gateway for Multiplatforms 9.3 and 10.1 could allow a user to transfer or view files due
CVE-2023-50311 LOW 3.1 DOWNGRADE IBM CICS Transaction Gateway for Multiplatforms 9.2 and 9.3 could disclose sensitive path information to an at

References

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