How severe is CVE-2026-22856?

CVE-2026-22856 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-22856 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-22856?

CVE-2026-22856 affects Freerdp. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-22856?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-22856 have an EU (EUVD) identifier?

Yes. CVE-2026-22856 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-2671.

When was CVE-2026-22856 published?

CVE-2026-22856 was published on 2026-01-14 and last updated on 2026-06-17.

CVE-2026-22856

CVE-2026-22856 is a high-severity vulnerability in Freerdp with a CVSS 3.x base score of 8.1. 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-362.

Key facts

Severity: High (CVSS 3.x base score 8.1)
CVSS v4: 6.8
EPSS exploit prediction: 0% (20th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-2671
Weakness: CWE-362
Affected product: Freerdp
Published: 2026-01-14
Last modified: 2026-06-17

Description

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, a race in the serial channel IRP thread tracking allows a heap use‑after‑free when one thread removes an entry from serial->IrpThreads while another reads it. This vulnerability is fixed in 3.20.1.

Frequently asked questions

What is CVE-2026-22856?: FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, a race in the serial channel IRP thread tracking allows a heap use‑after‑free when one thread removes an entry from serial->IrpThreads while another reads it. This vulnerability is fixed in 3.20.1.
How severe is CVE-2026-22856?: CVE-2026-22856 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-22856 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-22856?: CVE-2026-22856 affects Freerdp. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-22856?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-22856 have an EU (EUVD) identifier?: Yes. CVE-2026-22856 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-2671.
When was CVE-2026-22856 published?: CVE-2026-22856 was published on 2026-01-14 and last updated on 2026-06-17.

References

Affected products (1)

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

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