U.S. CISA adds SKYSEA Client View, Rapid7 Velociraptor, Microsoft Windows, and IGEL OS flaws to its Known Exploited Vulnerabilities catalog

SKYSEA Client View Ver.11.221.03 and earlier contains an improper authentication flaw (CWE-287) in the processing of authentication on the TCP connection used with the management console program. An attacker with network reachability to that TCP service can send crafted authentication data that triggers remote code execution with no credentials, no user interaction, and no special conditions (CVSS 3.1: 9.8). Successful exploitation gives the attacker full code execution on the console side, with high impact to confidentiality, integrity, and availability, and potential access to the managed-client inventory the console controls. Organizations running SKYSEA Client View Ver.11.221.03 or earlier are affected; the product is a client/IT-asset management suite deployed largely by Japanese organizations. CISA added the vulnerability to its Known Exploited Vulnerabilities catalog on October 14, 2025, indicating confirmed in-the-wild exploitation, and EPSS currently estimates a 19.4% probability of exploitation within 30 days.

Do: Upgrade SKYSEA Client View to a fixed release later than Ver.11.221.03 as directed in Sky Group's security advisory (https://www.skygroup.jp/security-info/170308.html), and inventory any console running Ver.11.221.03 or older. Until patched, restrict access to the management console TCP port from untrusted network segments and review console servers for signs of compromise. CISA KEV requires applying vendor mitigations or discontinuing use within the BOD 22-01 timeline.

CVE-2025-24990 is an untrusted pointer dereference (CWE-822) in the third-party Agere modem driver (ltmdm64.sys) that Microsoft ships natively with supported Windows client and server operating systems. Exploitation requires local access with limited privileges, and successful attacks yield high impact to the system's confidentiality, integrity, and availability (CVSS 3.1 7.8), a scoring pattern consistent with local privilege escalation. Because the driver is present by default, every supported Windows 10 build, Windows 11 build, and Windows Server 2008/2012/2016 installation listed by Microsoft is affected until patched. The flaw is being actively exploited in the wild — it was added to CISA's KEV on 2025-10-14 — although no public proof-of-concept is known. Microsoft remediated it in the October 2025 cumulative updates by removing ltmdm64.sys entirely, which means fax modem hardware that depends on this driver will stop working after patching.

Do: Apply the October 2025 (or later) Windows cumulative update, which remediates the flaw by removing ltmdm64.sys, and prioritize systems where untrusted or low-privileged users can run code (RDS/VDI hosts, shared workstations, jump servers). After patching, check for Agere-based fax modem dependencies tied to ltmdm64.sys, as that hardware will no longer function and will need replacement or an alternative. Federal agencies must apply mitigations per vendor instructions or follow BOD 22-01 timelines for cloud services.

CVE-2025-47827 is a Secure Boot bypass in IGEL OS before version 11, caused by improper verification of a cryptographic signature (CWE-347) in the igel-flash-driver module, which improperly validates a signature using a key past its expiration date. An attacker with physical access (CVSS vector AV:P) can boot a crafted root filesystem from an unverified SquashFS image, defeating the platform's Secure Boot guarantee and loading attacker-controlled code at boot time; the CVSS scoring assigns high availability impact. Deployments running IGEL OS 10 or earlier are affected; CISA's affected-product list names IGEL OS only, while the CPE data additionally tags Windows 10 (1507, 1607, 1809, 21H2, 22H2), Windows 11 (22H2-25H2) and Windows Server 2012/2016 releases, reflecting the shared Microsoft Secure Boot key ecosystem rather than a CISA-listed Microsoft impact. The flaw was added to the CISA Known Exploited Vulnerabilities catalog on 2025-10-14, indicating confirmed in-the-wild exploitation, with ransomware use unknown and EPSS estimating a 4.9% (92nd percentile) probability of exploitation within 30 days. A public proof-of-concept is available (github.com/Zedeldi/CVE-2025-47827), and vendors/CISA have required mitigation per BOD 22-01 guidance.

Do: Inventory all IGEL endpoints and upgrade any running OS 10 or earlier to IGEL OS 11 (current 11.x) per vendor instructions, which is the required KEV/BOD 22-01 remediation path. Because the attack requires physical access (AV:P), restrict physical and console access to thin clients in exposed locations such as lobbies, clinical areas and production floors, and inspect any device that may have been accessed for signs of root-filesystem tampering or unexpected boot behavior. The public PoC (Zedeldi/CVE-2025-47827) can be used to verify whether devices still boot an unverified SquashFS image.

Velociraptor allows collection of VQL queries packaged into Artifacts from endpoints. These artifacts can be used to do anything and usually run with elevated permissions. To limit access to some dangerous artifact, Velociraptor allows for those to require high permissions like EXECVE to launch. The Admin.Client.UpdateClientConfig is an artifact used to update the client's configuration. This artifact did not enforce an additional required permission, allowing users with COLLECT_CLIENT permissions (normally given by the "Investigator" role) to collect it from endpoints and update the configuration. This can lead to arbitrary command execution and endpoint takeover. To successfully exploit this vulnerability the user must already have access to collect artifacts from the endpoint (i.e. have the COLLECT_CLIENT given typically by the "Investigator' role).