CVE-2017-1000496: Commsy version 9.0.0 is vulnerable to XXE attacks in the configuration import functionality resulting in denia

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HIGH 8.8DOWNGRADE

CVE-2017-1000496 is a high-severity flaw (CVSS 8.8) affecting commsy. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Commsy version 9.0.0 is vulnerable to XXE attacks in the configuration import functionality resulting in denial of service and possibly remote execution of code.

Why this priority

High severity

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

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.7% (top 22%)
CISA exploited list	No
Weakness	CWE-611
Published	2018-01-03
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: commsy

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

Am I affected?

Timeline

2018-01-03 14:29 UTCPublished CVE record published
2026-06-17 00:59 UTCUpdated Record last modified

commsy commsy DOWNGRADE

Affected: 9.0.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 9.0.0

1. Check installed version

apt-cache policy commsy || rpm -q commsy || commsy --version

2. No fixed release: DOWNGRADE to a release before 9.0.0 (Debian / Ubuntu)

apt-cache madison commsy sudo apt install commsy=<VERSION_BEFORE_9.0.0> sudo apt-mark hold commsy

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

dnf --showduplicates list commsy sudo dnf downgrade commsy-<VERSION_BEFORE_9.0.0> sudo dnf versionlock add commsy

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-2017-1000496?

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

Is CVE-2017-1000496 being exploited?

CVE-2017-1000496 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-2017-1000496 affect?

CVE-2017-1000496 affects commsy. Severity is high (CVSS 8.8). Commsy version 9.0.0 is vulnerable to XXE attacks in the configuration import functionality resulting in denial of service and possibly remote execution of code.

How urgent is CVE-2017-1000496?

Priority 50/100. High severity

Related CVEs

CVE-2019-11880 HIGH 7.5 UPGRADE CommSy through 8.6.5 has SQL Injection via the cid parameter

References

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