How severe is CVE-2026-27951?

CVE-2026-27951 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2026-27951 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-27951?

CVE-2026-27951 affects Freerdp. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-27951?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-27951 have an EU (EUVD) identifier?

Yes. CVE-2026-27951 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8755.

When was CVE-2026-27951 published?

CVE-2026-27951 was published on 2026-02-25 and last updated on 2026-06-17.

CVE-2026-27951

CVE-2026-27951 is a medium-severity vulnerability in Freerdp with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-190.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (27th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-8755
Weakness: CWE-190
Affected product: Freerdp
Published: 2026-02-25
Last modified: 2026-06-17

Description

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, the function `Stream_EnsureCapacity` can create an endless blocking loop. This may affect all client and server implementations using `FreeRDP`. For practical exploitation this will only work on 32bit systems where the available physical memory is `>= SIZE_MAX`. Version 3.23.0 contains a patch. No known workarounds are available.

Frequently asked questions

What is CVE-2026-27951?: FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, the function `Stream_EnsureCapacity` can create an endless blocking loop. This may affect all client and server implementations using `FreeRDP`. For practical exploitation this will only work on 32bit systems where the available physical memory is `>= SIZE_MAX`. Version 3.23.0 contains a patch. No known workarounds are available.
How severe is CVE-2026-27951?: CVE-2026-27951 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2026-27951 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-27951?: CVE-2026-27951 affects Freerdp. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-27951?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-27951 have an EU (EUVD) identifier?: Yes. CVE-2026-27951 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8755.
When was CVE-2026-27951 published?: CVE-2026-27951 was published on 2026-02-25 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*

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