[UPDATE] [high] FreeRDP: Multiple vulnerabilities

highCVE-2026-55191 CVE-2026-55192 CVE-2026-55193 CVE-2026-55194 CVE-2026-55564 CVE-2026-55648

An attacker can exploit multiple vulnerabilities in FreeRDP to cause unspecified impacts, potentially execute arbitrary code, bypass security measures, manipulate data, disclose confidential information or cause a denial-of-service condition.

CSIRTS triage

vendor: FreeRDP product: FreeRDP Remote code execution Authentication bypass Code injection Information disclosure Denial of service

What: Multiple unspecified vulnerabilities in FreeRDP enabling arbitrary code execution, security bypass, data manipulation, information disclosure, and denial of service.
Who is affected: FreeRDP users and systems using affected versions for remote desktop protocol operations.
Urgency: High priority; arbitrary code execution and multiple impact vectors warrant immediate patching.
Action: Update FreeRDP to patched versions addressing CVE-2026-55191, CVE-2026-55192, CVE-2026-55193, CVE-2026-55194, CVE-2026-55564, and CVE-2026-55648.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity: high
Published: 2026-08-20
Exploitation: Not in CISA KEV at last sync
Language: Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1933

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-551910.63% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 47% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-551920.52% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 42% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-551930.63% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 47% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-551940.63% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 47% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-555640.37% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 30% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-556480.55% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 43% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-55191	coverage & exploitation status	NVD · CVE.org
CVE-2026-55192	coverage & exploitation status	NVD · CVE.org
CVE-2026-55193	coverage & exploitation status	NVD · CVE.org
CVE-2026-55194	coverage & exploitation status	NVD · CVE.org
CVE-2026-55564	coverage & exploitation status	NVD · CVE.org
CVE-2026-55648	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for FreeRDP

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

high[NEW] [high] FreeRDP: Multiple vulnerabilitiescert-bund · 2026-08-24
medium[NEW] [medium] FreeRDP: Multiple vulnerabilitiescert-bund · 2026-08-24
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unknownCVE-2026-55648: FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.0, freerdp_imag…nvd · 2026-08-19