CybersecurityVulnerability.NETRCECanada
CISA orders urgent action on actively exploited Langflow RCE flaw
July 21, 2026
Back to all postsThe Cybersecurity and Infrastructure Security Agency (CISA) has issued an alert regarding a recently discovered Remote Code Execution (RCE) vulnerability in the Langflow library, a popular .NET XML parser. This security flaw is currently being actively exploited by hackers. The vulnerability, identified as CVE-2023-21496, allows attackers to execute arbitrary code on affected systems. Given its widespread use and the potential severity of an attack, this issue poses a significant threat to Canadian businesses that utilize .NET applications, especially Small and Medium-sized Businesses (SMBs) and IT managers responsible for their security. To mitigate risk, it's essential to apply the available patch immediately or implement alternative measures to prevent exploitation of the Langflow RCE vulnerability.
Source: BleepingComputer
CybersecurityVulnerability.NETRCECanada
Concerned about this threat to your business?
We help Canadian SMBs deploy the controls discussed in this article. Free 30-minute assessment — no obligation.