Vpn

The U.S. Treasury Department sanctioned First VPN Service (1VPNS) and its administrator, Dmytro Rashevskyi, for facilitating ransomware attacks by providing anonymity and evasion capabilities to cybercriminals, and also sanctioned Yegeniy Vladimirovich Silayev for selling 'cryptors' that make malware harder to detect, impacting critical infrastructure.

An authentication bypass vulnerability, CVE-2026-0283, in Palo Alto Networks PAN-OS software allows an unauthenticated attacker with network access to establish an unauthorized site-to-site VPN connection when LSVPN functionality with configured satellites is enabled, leading to potential access to internal network resources.

An improper certificate validation vulnerability (CVE-2026-0277) in the Prisma Access Agent for iOS, affecting versions prior to 26.2.1, enables an attacker to perform a man-in-the-middle (MitM) attack to intercept VPN traffic, leading to potential compromise of data confidentiality and integrity.

A detection rule identifies suspicious outbound IPSEC NAT Traversal (NAT-T) tunnels, characterized by UDP traffic where both source and destination ports are 4500, originating from an internal host to an external destination, a technique frequently abused by threat actors to establish covert command and control channels or exfiltrate data while evading network defenses.

WatchGuard has released security advisories to address critical vulnerabilities, including a race condition, use-after-free, and local privilege escalation, in its Fireware OS and Mobile VPN with SSL client for Windows, which could lead to remote code execution on appliances and local privilege escalation on client systems if not patched immediately.

This brief details a detection for the addition of a new VPN SSL Web Portal on FortiGate Firewalls, a configuration change that could be utilized by attackers for establishing persistence or initial access to external remote services, as indicated by observed modifications of VPN SSL settings.

Threat actors exploited CVE-2024-12802, a vulnerability in SonicWall Gen6 SSL-VPN appliances, to bypass multi-factor authentication (MFA) after brute-forcing VPN credentials, leading to the deployment of ransomware-related tools.

An authentication bypass vulnerability exists in Palo Alto Networks PAN-OS GlobalProtect portal and gateway (CVE-2026-0257) when authentication override cookies are enabled, allowing an attacker to establish an unauthorized VPN connection.

CVE-2026-0249 describes multiple improper certificate validation vulnerabilities in the Palo Alto Networks GlobalProtect app that could allow an attacker to intercept encrypted communications and potentially compromise the endpoint, especially on macOS, Android, and ChromeOS.

CVE-2026-0248 is an improper certificate validation vulnerability in Prisma Access Agent for Android and Chrome OS, enabling a man-in-the-middle (MitM) attack to intercept VPN traffic and capture sensitive device information by presenting a certificate issued by a trusted Certificate Authority.

A remote, anonymous attacker can exploit multiple vulnerabilities in strongSwan to conduct a denial-of-service attack or potentially achieve arbitrary code execution.

This rule detects the initial use of AWS discovery APIs from VPN-associated ASNs by a previously unseen identity, indicating potential reconnaissance activity.

A critical authentication bypass vulnerability exists in openvpn-auth-oauth2 versions 1.26.3 through 1.27.2 when deployed in the experimental plugin mode; clients that do not support WebAuth/SSO are incorrectly granted VPN access without completing OIDC authentication.

Synology SSL VPN Client before 1.4.5-0684 stores passwords in plaintext, allowing remote attackers to potentially access or manipulate user PIN codes, leading to unauthorized VPN configuration and traffic interception.

IDS alerts indicate a potential exploitation attempt against a Fortigate VPN server using CVE-2023-27997, characterized by repeated GET requests to the /remote/logincheck endpoint originating from a specific IPv6 address.

Multiple IDS alerts indicate potential exploitation attempts against Fortigate VPN servers using CVE-2023-27997, alongside traffic from a suspicious user agent, possibly indicating reconnaissance or exploit activity.

Detects FortiGate SSL VPN logins followed by a SIEM detection alert for the same user within a short timeframe, potentially indicating VPN abuse, credential compromise, or initial access followed by post-compromise activity.

The Flax Typhoon group uses SoftEther VPN, masquerading the VPN client as legitimate Windows binaries like conhost.exe and dllhost.exe, to obfuscate their network activity within compromised Taiwanese organizations.