CVE-2026-27951Disclosure(freerdp / freerdp)

MEDIUMCVSS 7.5 · HIGH

Exploitation ongoing with high activity in latest observed window (3 mentions)

Immediate actions

  • Patch freerdp freerdp systems immediately
  • Assume compromise if assets are exposed
  • Hunt for exploitation attempts and persistence artifacts
  • Increase monitoring for publicly documented tradecraft

Recommended action window: Immediate (within 24h)

NVD description

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, the function `Stream_EnsureCapacity` can create an endless blocking loop. This may affect all client and server implementations using `FreeRDP`. For practical exploitation this will only work on 32bit systems where the available physical memory is `>= SIZE_MAX`. Version 3.23.0 contains a patch. No known workarounds are available.

5.5/ 10 priority

Sources & remediation

Weakness type (CWE)
CWE-190

Priority

MEDIUM

Exploitation

ACTIVE

PoC

YES

Patch

AVAILABLE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • freerdp

Threat summary

  • Active exploitation appears in 1 classified signals
  • Public PoC is present in monitored signal
  • Patch or workaround signal is available
  • 3 mentions across 1 observed day

What's happening

  • Active exploitation reported across 1 signal
  • PoC mentioned or linked in 1 signal
  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 3 signals
  • Disclosure: 2 classified signals
  • 3 total mentions across 1 day

Affected systems

Vendors
Products
freerdp

Deep dive

Activity timeline3 mentions / 1d
01223Mentions · 2026-02-26: 3PoC Mentioned / Linked · 2026-02-26: 1Active Exploitation · 2026-02-26: 1Patch / Workaround · 2026-02-26: 1Technical Details · 2026-02-26: 302-26
Signal classification2 categories
Disclosure
266.7%
Active Exploitation
133.3%
Referenced assets7 URLs
Full discourse3 posts
  • CVE@CVEnew
    Disclosure

    CVE-2026-27951 FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, the function `Stream_EnsureCapacity` can create an endless blocking loop. Th… https://www.cve.org/CVERecord?id=CVE-2026-27951

    Post summary

    The CVE-2026-27951 vulnerability in FreeRDP involves an endless blocking loop in the `Stream_EnsureCapacity` function before version 3.23.0, but no PoC, exploit, or patch details are provided.

    00000111
    56.6K followersView on X
  • NerdieNews@NewsNerdie
    Active Exploitation

    Today's Top Cybersecurity News – February 26, 2026 1. CVE-2026-3057: SQL Injection in pearProjectApi Backend Task.php dateTotalForProject A remote SQL injection vulnerability exists in the dateTotalForProject function of pearProjectApi up to version 2.8.10, allowing attackers to manipulate the projectCode argument. The exploit is publicly available, increasing the risk of unauthorized data access or modification. Sources: Cvefeed https://cvefeed.io/vuln/detail/CVE-2026-3057 2. Critical Authentication Bypass and Privilege Escalation Vulnerabilities in Cisco Catalyst SD-WAN Multiple critical vulnerabilities in Cisco Catalyst SD-WAN products allow unauthenticated remote attackers to bypass authentication, escalate privileges to admin or root, and take full control of affected devices. Notably, CVE-2026-20127 has been actively exploited in zero-day attacks since 2023, enabling attackers to compromise controllers and insert rogue peers into networks. Users are urged to identify vulnerable devices, collect forensic data, update to patched versions, and conduct threat hunting. Sources: Bleepingcomputer, Cvefeed, Cyberscoop, Feedburner, Gbhackers, Kyberturvallisuuskeskus, Rapid7, Talosintelligence, Therecord https://www.kyberturvallisuuskeskus.fi/fi/kriittisia-haavoittuvuuksia-cisco-catalyst-sd-wan-tuotteissa 3. Multiple Critical and High Vulnerabilities Found in Binardat 10G08-0800GSM Network Switch A series of critical and high-severity vulnerabilities have been identified in Binardat 10G08-0800GSM network switch firmware versions prior to V300SP10260209. These include hard-coded credentials, predictable session IDs, plaintext password exposure, weak encryption, and command injection, exposing devices to unauthorized access, credential compromise, and remote code execution. Medium-severity issues such as missing login rate limiting, CSRF, and XSS further increase the attack surface. Sources: Bleepingcomputer, Cvefeed, Securityweek https://cvefeed.io/vuln/detail/CVE-2026-27521 4. Multiple Vulnerabilities Disclosed Including Critical Path Traversal in Local Path Provisioner Several security vulnerabilities were disclosed affecting various platforms including Octopus Deploy, Red Hat Developer Hub, openSUSE, Udisks, Rancher CLI, and Local Path Provisioner. Notably, a critical path traversal vulnerability in Local Path Provisioner allows attackers to overwrite sensitive files, while other issues range from denial of service to unauthorized access of encryption metadata. Sources: Cvefeed https://cvefeed.io/vuln/detail/CVE-2026-0704 5. Multiple Critical Vulnerabilities in FreeRDP Affecting Versions Prior to 3.23.0 FreeRDP versions before 3.23.0 contain multiple severe vulnerabilities including heap-use-after-free, out-of-bounds writes, integer overflow, and denial-of-service flaws. These issues can lead to client or server crashes, memory corruption, and potential remote code execution, especially when interacting with malicious RDP servers or crafted data. A patch addressing all these vulnerabilities is available in version 3.23.0. Sources: Cvefeed https://cvefeed.io/vuln/detail/CVE-2026-27951 Stay sharp. Stay secure. #NerdieNews #InfoSec #CyberSecurity #TechNews #DataSecurity #CyberThreats

    Post summary

    The article reports several critical CVEs, noting active exploitation of Cisco SD‑WAN CVE‑2026‑20127, publicly available exploits for other vulnerabilities, and available patches for affected software.

    0000037
    54 followersView on X
  • Vulmon Vulnerability Feed@VulmonFeeds
    Disclosure

    CVE-2026-27951 FreeRDP Denial of Service Vulnerability in Stream_EnsureCapacity Function Before 3.23.0 https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-27951

    Post summary

    A Denial of Service vulnerability in FreeRDP's Stream_EnsureCapacity function before version 3.23.0 has been disclosed.

    0000050
    4.0K followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appfreerdpfreerdp---

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