September 2026 CVE Landscape
Recorded Future says 80 vulnerabilities were actively exploited in September 2026, including NetScaler zero-days.
Unauthenticated RCE in Microsoft Remote Desktop Services (BlueKeep)
CISA: Microsoft Remote Desktop Services Remote Code Execution Vulnerability
CVE-2019-0708 is a use-after-free (CWE-416) vulnerability in Microsoft Remote Desktop Services, formerly Terminal Services, in which an unauthenticated attacker can connect to a target system over RDP and send specially crafted requests to trigger the flaw. Because the trigger requires no authentication, the flaw is wormable: a successful exploit grants remote code execution on the target host, potentially with elevated privileges, and could allow self-propagating attacks similar to WannaCry. Organizations running the affected Microsoft Remote Desktop Services, particularly legacy Windows releases still accepting inbound RDP connections, are in scope. Exploitation is confirmed in the wild: the flaw (nicknamed BlueKeep) is listed in CISA's KEV catalog (added 2021-11-03), CISA notes known ransomware use, and EPSS assigns it a 100% probability of exploitation within 30 days.
What to do: Apply Microsoft's security updates for CVE-2019-0708 per vendor instructions, prioritizing legacy or end-of-support Windows systems exposed to inbound RDP. As mitigation, restrict RDP (TCP 3389) to trusted networks or VPN access, require Network Level Authentication (NLA), and audit perimeter firewalls and public scans for open RDP listeners. The vulnerability is in the CISA KEV catalog, so patching is treated as a required action for federal and high-risk environments.
| Product | Affected |
|---|---|
| Microsoft Remote Desktop Services | — |
Order-of-magnitude estimate by the model from install counts, market share and public scan data it knows; verify before quoting.
A remote code execution vulnerability exists in Remote Desktop Services formerly known as Terminal Services when an unauthenticated attacker connects to the target system using RDP and sends specially crafted requests, aka 'Remote Desktop Services Remote Code Execution Vulnerability'.
Recorded Future says 80 vulnerabilities were actively exploited in September 2026, including NetScaler zero-days.
Kaspersky details NightEagle, Hacking Cat, and Toy Ghouls targeting Russian enterprises with Exchange backdoors, Gorilla RAT, and destructive Monkey ransomware.
NightEagle espionage group used GhostContainer, BlueKeep exploitation, and DCSync attempts to compromise Russian organizations and target Active Directory controllers.
NightEagle (APT-Q-95) breached Russian firms using stolen VPN credentials, a GhostContainer Exchange backdoor, Dev Tunnels abuse, and DCSync.
Kaspersky links NightEagle (APT-Q-95) intrusions in Russia to stolen VPN credentials, the GhostContainer Exchange backdoor, BlueKeep exploitation, and covert tunneling for espionage.
Kaspersky links NightEagle (APT-Q-95) attacks on Russian firms to compromised VPN credentials, a GhostContainer Exchange backdoor, RDP tunneling, BlueKeep exploitation, and DCSync.
Kaspersky links NightEagle (APT-Q-95) intrusions in Russia to stolen VPN credentials, the GhostContainer Exchange backdoor, and Microsoft Dev Tunnels abuse.
Cyble sensors logged exploitation attempts against about 20 flaws as CISA issued 14 ICS advisories.
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