[UPDATE] [medium] FreeRDP: Multiple vulnerabilities

CSIRTS triage

What

A remote, anonymous attacker can exploit multiple vulnerabilities in FreeRDP to potentially execute arbitrary code, cause a denial-of-service condition, manipulate data, disclose confidential information, or conduct other unspecified attacks.

Who is affected

Deployments of FreeRDP are affected.

Urgency

Remediation is medium urgency due to the potential for serious exploitation.

Action

Apply the latest updates for FreeRDP to mitigate these vulnerabilities.

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

Details

Source

CERT-Bund (BSI) Security Advisories (DE · national-cert · site)

Severity

medium

Published

2026-07-02

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-2026-0880

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-2026-339520.27% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 19% of all scored CVEs.
• Low exploitation riskCVE-2026-339770.26% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 17% of all scored CVEs.
• Low exploitation riskCVE-2026-339820.19% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 9% of all scored CVEs.
• Low exploitation riskCVE-2026-339830.43% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 34% of all scored CVEs.
• Low exploitation riskCVE-2026-339840.40% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 32% of all scored CVEs.
• Low exploitation riskCVE-2026-339850.21% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 11% of all scored CVEs.
• Low exploitation riskCVE-2026-339860.27% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 18% of all scored CVEs.
• Low exploitation riskCVE-2026-339870.10% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 1% of all scored CVEs.
• Low exploitation riskCVE-2026-339950.28% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 20% of all scored CVEs.

Referenced CVEs

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.

• unknownCVE-2026-57158: FreeRDP is a free implementation of the Remote Desktop Protocol. From 3.21.0 before 3.28.0, Fr…nvd · 2026-07-10
• mediumCVE-2026-57157: FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.28.0, FreeRDP serv…nvd · 2026-07-10
• unknownCVE-2026-57156: FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.28.0 on 32-bit bui…nvd · 2026-07-10
• highCVE-2026-55827: FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.1, FreeRDP clie…nvd · 2026-07-10
• high[NEW] [high] FreeRDP: Vulnerability allows code executioncert-bund · 2026-07-09
• medium[NEW] [medium] FreeRDP: Vulnerability allows code execution and denial of servicecert-bund · 2026-07-09

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