CVE-2024-28252: CoreWCF is a port of the service side of Windows Communication Foundation (WCF) to .NET Core

This month

HIGH 7.5REMOTEDOWNGRADE

CVE-2024-28252 is a high-severity flaw (CVSS 7.5) affecting corewcf. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

CoreWCF is a port of the service side of Windows Communication Foundation (WCF) to .NET Core. If you have a NetFraming based CoreWCF service, extra system resources could be consumed by connections being left established instead of closing or aborting them. There are two scenarios when this can happen. When a client established a connection to the service and sends no data, the service will wait indefinitely for the client to initiate the NetFram

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	0.6% (top 52%)
CISA exploited list	No
Weakness	CWE-404
Published	2024-03-15
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: corewcf

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

Am I affected?

Timeline

2024-03-15 19:15 UTCPublished CVE record published
2026-06-17 07:21 UTCUpdated Record last modified

corewcf corewcf DOWNGRADE

Affected: 1.4.1 · 1.5.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.4.1

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.4.1 (Debian / Ubuntu)

apt-cache madison corewcf sudo apt install corewcf=<VERSION_BEFORE_1.4.1> sudo apt-mark hold corewcf

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

dnf --showduplicates list corewcf sudo dnf downgrade corewcf-<VERSION_BEFORE_1.4.1> sudo dnf versionlock add corewcf

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-2024-28252?

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

Is CVE-2024-28252 being exploited?

CVE-2024-28252 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-2024-28252 affect?

CVE-2024-28252 affects corewcf. Severity is high (CVSS 7.5). CoreWCF is a port of the service side of Windows Communication Foundation (WCF) to .NET Core. If you have a NetFraming based CoreWCF service, extra system resources could be consumed by connections being left established instead of closing

How urgent is CVE-2024-28252?

Priority 43/100. High severity; Remotely exploitable, no login, no user action

Software pages

Windows vulnerabilities · .NET vulnerabilities

References

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