How severe is CVE-2026-22855?

CVE-2026-22855 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability high.

Is CVE-2026-22855 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-22855?

CVE-2026-22855 affects Freerdp. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-22855?

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

Does CVE-2026-22855 have an EU (EUVD) identifier?

Yes. CVE-2026-22855 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-2672.

When was CVE-2026-22855 published?

CVE-2026-22855 was published on 2026-01-14 and last updated on 2026-06-30.

CVE-2026-22855

CVE-2026-22855 is a critical-severity vulnerability in Freerdp with a CVSS 3.x base score of 9.1. 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-125.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
CVSS v4: 5.6
EPSS exploit prediction: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-2672
Weakness: CWE-125
Affected product: Freerdp
Published: 2026-01-14
Last modified: 2026-06-30

Description

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, a heap out-of-bounds read occurs in the smartcard SetAttrib path when cbAttrLen does not match the actual NDR buffer length. This vulnerability is fixed in 3.20.1.

Frequently asked questions

What is CVE-2026-22855?: FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, a heap out-of-bounds read occurs in the smartcard SetAttrib path when cbAttrLen does not match the actual NDR buffer length. This vulnerability is fixed in 3.20.1.
How severe is CVE-2026-22855?: CVE-2026-22855 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability high.
Is CVE-2026-22855 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-22855?: CVE-2026-22855 affects Freerdp. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-22855?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-22855 have an EU (EUVD) identifier?: Yes. CVE-2026-22855 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-2672.
When was CVE-2026-22855 published?: CVE-2026-22855 was published on 2026-01-14 and last updated on 2026-06-30.

References

Affected products (1)

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

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