CVE-2019-15135: The handshake protocol in Object Management Group (OMG) DDS Security 1.1 sends cleartext information about all

This month

HIGH 7.5REMOTEDOWNGRADE

CVE-2019-15135 is a high-severity flaw (CVSS 7.5) affecting dds security. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The handshake protocol in Object Management Group (OMG) DDS Security 1.1 sends cleartext information about all of the capabilities of a participant (including capabilities inapplicable to the current session), which makes it easier for attackers to discover potentially sensitive reachability information on a Data Distribution Service (DDS) network.

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	2.0% (top 19%)
CISA exploited list	No
Weakness	CWE-319
Published	2019-08-18
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: omg

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

Am I affected?

Timeline

2019-08-18 16:15 UTCPublished CVE record published
2026-06-17 02:19 UTCUpdated Record last modified

omg dds security DOWNGRADE

Affected: 1.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.1

1. Check installed version

apt-cache policy dds-security || rpm -q dds-security || dds-security --version

2. No fixed release: DOWNGRADE to a release before 1.1 (Debian / Ubuntu)

apt-cache madison dds-security sudo apt install dds-security=<VERSION_BEFORE_1.1> sudo apt-mark hold dds-security

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

dnf --showduplicates list dds-security sudo dnf downgrade dds-security-<VERSION_BEFORE_1.1> sudo dnf versionlock add dds-security

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-2019-15135?

dds security: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-15135 being exploited?

CVE-2019-15135 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-2019-15135 affect?

CVE-2019-15135 affects dds security. Severity is high (CVSS 7.5). The handshake protocol in Object Management Group (OMG) DDS Security 1.1 sends cleartext information about all of the capabilities of a participant (including capabilities inapplicable to the current session), which makes it easier for atta

How urgent is CVE-2019-15135?

Priority 51/100. High severity; Remotely exploitable, no login, no user action

References

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