CVE-2020-5779: A flaw in Trading Technologies Messaging 7.1.28.3 (ttmd.exe) relates to invalid parameter handling when callin

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HIGH 7.5REMOTEDOWNGRADE

CVE-2020-5779 is a high-severity flaw (CVSS 7.5) affecting trading technologies messaging. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A flaw in Trading Technologies Messaging 7.1.28.3 (ttmd.exe) relates to invalid parameter handling when calling strcpy_s() with an invalid parameter (i.e., a long src string parameter) as a part of processing a type 4 message sent to default TCP RequestPort 10200. It's been observed that ttmd.exe terminates as a result.

Why this priority

High severity
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.1% (top 36%)
CISA exploited list	No
Published	2020-09-02
Last modified	2026-06-17

Publisher (CNA): Tenable Network Security, Inc. · Vendor: tradingtechnologies

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

Am I affected?

Timeline

2020-09-02 20:15 UTCPublished CVE record published
2026-06-17 03:22 UTCUpdated Record last modified

tradingtechnologies trading technologies messaging DOWNGRADE

Affected: 7.1.28.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.1.28.3

1. Check installed version

apt-cache policy trading-technologies-messaging || rpm -q trading-technologies-messaging || trading-technologies-messaging --version

2. No fixed release: DOWNGRADE to a release before 7.1.28.3 (Debian / Ubuntu)

apt-cache madison trading-technologies-messaging sudo apt install trading-technologies-messaging=<VERSION_BEFORE_7.1.28.3> sudo apt-mark hold trading-technologies-messaging

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

dnf --showduplicates list trading-technologies-messaging sudo dnf downgrade trading-technologies-messaging-<VERSION_BEFORE_7.1.28.3> sudo dnf versionlock add trading-technologies-messaging

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-2020-5779?

trading technologies messaging: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-5779 being exploited?

CVE-2020-5779 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-2020-5779 affect?

CVE-2020-5779 affects trading technologies messaging. Severity is high (CVSS 7.5). A flaw in Trading Technologies Messaging 7.1.28.3 (ttmd.exe) relates to invalid parameter handling when calling strcpy_s() with an invalid parameter (i.e., a long src string parameter) as a part of processing a type 4 message sent to defaul

How urgent is CVE-2020-5779?

Priority 47/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2020-5778 HIGH 7.5 DOWNGRADE A flaw exists in Trading Technologies Messaging 7.1.28.3 (ttmd.exe) due to improper validation of user-supplie

References

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