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CVE-2026-23732

Freerdp buffer overflow

7.5 HIGHPublic exploitEPSS 0.56%
  1. Published19 Jan 2026

Description

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0, FastGlyph parsing trusts `cbData`/remaining length and never validates against the minimum size implied by `cx/cy`. A malicious server can trigger a client‑side global buffer overflow, causing a crash (DoS). Version 3.21.0 contains a patch for the issue.

CVSS 3.1 breakdown

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

Affected products

Freerdp< 3.21.0

Remediation

Fixed in
Freerdp≥ 3.21.0

References

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Frequently asked

Is CVE-2026-23732 being actively exploited?

CVE-2026-23732 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.56%.

How severe is CVE-2026-23732?

CVE-2026-23732 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 0.56% probability of exploitation.

Which products are affected by CVE-2026-23732?

Affected products include Freerdp.

How do I fix CVE-2026-23732?

Upgrade affected software to a fixed version, for example Freerdp 3.21.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-23732 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.

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