Secuno
ENNL
Book demo

CVE-2026-44420

Freerdp buffer overflow

8.8 HIGHPublic exploitEPSS 0.85%
  1. Published29 May 2026

Description

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.26.0, a malicious RDP client can trigger a heap-buffer-overflow write in FreeRDP's server-side clipboard (cliprdr) channel by sending a CB_CLIP_CAPS PDU with a too-small capabilitySetLength. This can crash the server process (remote DoS) and may be exploitable for code execution because it corrupts heap memory. This vulnerability is fixed in 3.26.0.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Freerdp< 3.26.0

Remediation

Fixed in
Freerdp≥ 3.26.0

References

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

CVE-2026-148888.1
IBM DataPower Gateway 10.5.0.0 through 10.5.0.22, 10.6.1 through 10.6.6, 10.6.0.0…
CVE-2026-142699.8
IBM DataPower Gateway 10.5.0.0 through 10.5.0.22, 10.6.1 through 10.6.6, 10.6.0.0…
CVE-2026-764719.8
A vulnerability in the NX-API feature of Cisco NX-OS Software could allow an…
CVE-2026-465708.1
In NTFS-3G before 2026.7.7, a heap buffer overflow exists in ntfs_index_walk_down() in…
CVE-2026-1062928.3
Buffer overflow in Fonts in Google Chrome prior to 155.0.8059.39 allowed a remote…
CVE-2026-1062478.3
Buffer overflow in ANGLE in Google Chrome prior to 155.0.8059.39 allowed a remote…

Frequently asked

Is CVE-2026-44420 being actively exploited?

CVE-2026-44420 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.85%.

How severe is CVE-2026-44420?

CVE-2026-44420 has a CVSS 3.1 base score of 8.8, rated high. EPSS estimates a 0.85% probability of exploitation.

Which products are affected by CVE-2026-44420?

Affected products include Freerdp.

How do I fix CVE-2026-44420?

Upgrade affected software to a fixed version, for example Freerdp 3.26.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-44420 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation worksBook a demo

Get Patch this first every Monday

Five vulnerabilities that matter this week, ranked on real exploitation. Plain language, one email, no spam.

You can unsubscribe with one click from every issue. We handle your details as described in our privacy policy.

Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.