CVE-2017-6506: In Azure Data Expert Ultimate 2.2.16, the SMTP verification function suffers from a buffer overflow vulnerabil

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CRITICAL 9.8REMOTEDOWNGRADE

CVE-2017-6506 is a critical-severity flaw (CVSS 9.8) affecting data expert ultimate. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In Azure Data Expert Ultimate 2.2.16, the SMTP verification function suffers from a buffer overflow vulnerability, leading to remote code execution. The attack vector is a crafted SMTP daemon that sends a long 220 (aka "Service ready") string.

Why this priority

Critical severity
EPSS top 4%: very likely to be exploited
Public exploit reference
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	11.7% (top 4%)
CISA exploited list	No
Weakness	CWE-119
Published	2017-03-10
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: azure dex

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

Am I affected?

Timeline

2017-03-10 10:59 UTCPublished CVE record published
2026-06-17 01:22 UTCUpdated Record last modified

azure dex data expert ultimate DOWNGRADE

Affected: 2.2.16

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.2.16

1. Check installed version

apt-cache policy data-expert-ultimate || rpm -q data-expert-ultimate || data-expert-ultimate --version

2. No fixed release: DOWNGRADE to a release before 2.2.16 (Debian / Ubuntu)

apt-cache madison data-expert-ultimate sudo apt install data-expert-ultimate=<VERSION_BEFORE_2.2.16> sudo apt-mark hold data-expert-ultimate

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

dnf --showduplicates list data-expert-ultimate sudo dnf downgrade data-expert-ultimate-<VERSION_BEFORE_2.2.16> sudo dnf versionlock add data-expert-ultimate

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.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: Azure Data Expert Ultimate 2.2.16 - Remote Buffer Overflow

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-2017-6506?

data expert ultimate: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2017-6506 being exploited?

CVE-2017-6506 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-2017-6506 affect?

CVE-2017-6506 affects data expert ultimate. Severity is critical (CVSS 9.8). In Azure Data Expert Ultimate 2.2.16, the SMTP verification function suffers from a buffer overflow vulnerability, leading to remote code execution. The attack vector is a crafted SMTP daemon that sends a long 220 (aka "Service ready") stri

How urgent is CVE-2017-6506?

Priority 68/100. Critical severity; EPSS top 4%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

Azure vulnerabilities

References

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