CVE-2025-0556: In Progress® Telerik® Report Server, versions prior to 2025 Q1 (11.0.25.211) when using the older .NET Framewo

Q: How do I fix CVE-2025-0556?

telerik report server: upgrade to 11.0.25.211. Exact commands for each OS are on this page.

Q: Is CVE-2025-0556 being exploited?

CVE-2025-0556 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-0556 affect?

CVE-2025-0556 affects telerik report server. Severity is high (CVSS 8.8). In Progress® Telerik® Report Server, versions prior to 2025 Q1 (11.0.25.211) when using the older .NET Framework implementation, communication of non-sensitive information between the service agent process and app host process occurs over a

Routine

HIGH 8.8UPGRADE

CVE-2025-0556 is a high-severity flaw (CVSS 8.8) affecting telerik report server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In Progress® Telerik® Report Server, versions prior to 2025 Q1 (11.0.25.211) when using the older .NET Framework implementation, communication of non-sensitive information between the service agent process and app host process occurs over an unencrypted tunnel, which can be subjected to local network traffic sniffing.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 76%)
CISA exploited list	No
Weakness	CWE-319
Published	2025-02-12
Last modified	2026-06-17

Publisher (CNA): Progress Software Corporation · Vendor: progress

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

Am I affected?

Timeline

2025-02-12 16:15 UTCPublished CVE record published
2026-06-17 08:26 UTCUpdated Record last modified

progress telerik report server UPGRADE

Affected: < 11.0.25.211

Fixed in: 11.0.25.211

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy telerik-report-server || rpm -q telerik-report-server || telerik-report-server --version

2. UPGRADE to 11.0.25.211 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade telerik-report-server

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade telerik-report-server

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2025-0556?

telerik report server: upgrade to 11.0.25.211. Exact commands for each OS are on this page.

Is CVE-2025-0556 being exploited?

CVE-2025-0556 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-2025-0556 affect?

CVE-2025-0556 affects telerik report server. Severity is high (CVSS 8.8). In Progress® Telerik® Report Server, versions prior to 2025 Q1 (11.0.25.211) when using the older .NET Framework implementation, communication of non-sensitive information between the service agent process and app host process occurs over a

How urgent is CVE-2025-0556?

Priority 37/100. High severity

Software pages

.NET vulnerabilities

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References

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