CVE-2018-13416: In Universal Media Server (UMS) 7.1.0, the XML parsing engine for SSDP/UPnP functionality is vulnerable to an

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CRITICAL 9.8REMOTEDOWNGRADE

CVE-2018-13416 is a critical-severity flaw (CVSS 9.8) affecting universal media server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In Universal Media Server (UMS) 7.1.0, the XML parsing engine for SSDP/UPnP functionality is vulnerable to an XML External Entity Processing (XXE) attack. Remote, unauthenticated attackers can use this vulnerability to: (1) Access arbitrary files from the filesystem with the same permission as the user account running UMS, (2) Initiate SMB connections to capture a NetNTLM challenge/response and crack to cleartext password, or (3) Initiate SMB con

Why this priority

Critical severity
EPSS top 3%: 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	19.9% (top 3%)
CISA exploited list	No
Weakness	CWE-611
Published	2018-08-03
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: spirton

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

Am I affected?

Timeline

2018-08-03 17:29 UTCPublished CVE record published
2026-06-17 01:39 UTCUpdated Record last modified

spirton universal media server DOWNGRADE

Affected: 7.1.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.1.0

1. Check installed version

apt-cache policy universal-media-server || rpm -q universal-media-server || universal-media-server --version

2. No fixed release: DOWNGRADE to a release before 7.1.0 (Debian / Ubuntu)

apt-cache madison universal-media-server sudo apt install universal-media-server=<VERSION_BEFORE_7.1.0> sudo apt-mark hold universal-media-server

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

dnf --showduplicates list universal-media-server sudo dnf downgrade universal-media-server-<VERSION_BEFORE_7.1.0> sudo dnf versionlock add universal-media-server

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: Universal Media Server 7.1.0 - SSDP Processing XML External Entity Injection

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-2018-13416?

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

Is CVE-2018-13416 being exploited?

CVE-2018-13416 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-2018-13416 affect?

CVE-2018-13416 affects universal media server. Severity is critical (CVSS 9.8). In Universal Media Server (UMS) 7.1.0, the XML parsing engine for SSDP/UPnP functionality is vulnerable to an XML External Entity Processing (XXE) attack. Remote, unauthenticated attackers can use this vulnerability to: (1) Access arbitrary

How urgent is CVE-2018-13416?

Priority 69/100. Critical severity; EPSS top 3%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

References

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