How severe is CVE-2026-33983?

CVE-2026-33983 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-33983 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-33983?

CVE-2026-33983 affects Freerdp. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-33983?

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

Does CVE-2026-33983 have an EU (EUVD) identifier?

Yes. CVE-2026-33983 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-17227.

When was CVE-2026-33983 published?

CVE-2026-33983 was published on 2026-03-30 and last updated on 2026-06-30.

CVE-2026-33983

CVE-2026-33983 is a medium-severity vulnerability in Freerdp with a CVSS 3.x base score of 6.5. 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 6.5)
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-17227
Weakness: CWE-190
Affected product: Freerdp
Published: 2026-03-30
Last modified: 2026-06-30

Description

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, progressive_decompress_tile_upgrade() detects a mismatch via progressive_rfx_quant_cmp_equal() but only emits WLog_WARN, execution continues. The wrapped value (247) is used as a shift exponent, causing undefined behavior and an approximately 80 billion iteration loop (CPU DoS). This issue has been patched in version 3.24.2.

Frequently asked questions

What is CVE-2026-33983?: FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, progressive_decompress_tile_upgrade() detects a mismatch via progressive_rfx_quant_cmp_equal() but only emits WLog_WARN, execution continues. The wrapped value (247) is used as a shift exponent, causing undefined behavior and an approximately 80 billion iteration loop (CPU DoS). This issue has been patched in version 3.24.2.
How severe is CVE-2026-33983?: CVE-2026-33983 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-33983 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-33983?: CVE-2026-33983 affects Freerdp. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-33983?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-33983 have an EU (EUVD) identifier?: Yes. CVE-2026-33983 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-17227.
When was CVE-2026-33983 published?: CVE-2026-33983 was published on 2026-03-30 and last updated on 2026-06-30.

References

Affected products (1)

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

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