CVE-2026-55564

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.32% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 25.6% of scored records. A rank, not a probability.

NVD base score

7.1 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H

NVD analysis status

Analyzed. NVD last modified this record on 2026-10-26.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-08-19 17:45Z2 MO AGO

Last updated

2026-08-25 03:33Z2 MO AGO

Reserved

2026-06-16

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

Medium (CVSS 5.4)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L

Weaknesses

• CWE-125Out-of-bounds ReadBase
• CWE-193Off-by-one ErrorBase

Data version

5.2

Document digest

da427c438fedae653af0223d445a1af53d90fc9800a123eadc0c79da2a63423d

• github.comhttps://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-6xmj-pr98-cx4cx_refsource_CONFIRM
• github.comhttps://github.com/FreeRDP/FreeRDP/pull/12885x_refsource_MISC
• github.comhttps://github.com/FreeRDP/FreeRDP/commit/c29324750e3cbcba8761f147b7a5235cc686930fx_refsource_MISC
• github.comhttps://github.com/FreeRDP/FreeRDP/releases/tag/3.27.0x_refsource_MISC