CISA has added a SharePoint remote code execution flaw to its Known Exploited Vulnerabilities catalog after confirming active exploitation, months after Microsoft rated it less likely to be attacked. The bug (CVE-2026-45659, CVSS 8.8) comes from unsafe deserialization of untrusted data and lets an authenticated attacker with only Site Member permissions run code on a SharePoint server over the network, with low complexity and no user interaction. Microsoft patched it in May for SharePoint Server Subscription Edition, 2019, and Enterprise 2016. On-premises SharePoint is a repeated target because it holds sensitive data and is often internet-facing, and it has a long history of weaponized code execution flaws.
CISA has updated its Known Exploited Vulnerabilities catalog to warn that ransomware gangs are now exploiting BlueHammer, a Microsoft Defender privilege-escalation flaw. The bug (CVE-2026-33825) lets a local attacker who already has a foothold escalate to SYSTEM by abusing Defender's file-remediation logic, giving them access to password hashes and the control needed to disable defenses and prepare systems for encryption. It was leaked with proof-of-concept code by a researcher in early April as a protest over Microsoft's disclosure process, exploited as a zero-day, then patched on April 14. It cannot be used for remote compromise on its own, but it strengthens attackers after initial access.
Attackers are actively exploiting a critical flaw in PTC Windchill and FlexPLM, product lifecycle management software widely used across automotive, aerospace, defense, and manufacturing to store designs, engineering data, and intellectual property. The bug (CVE-2026-12569) is an unsafe deserialization issue that lets an unauthenticated attacker run code remotely by sending a crafted request. PTC patched it in mid-June, but has since reported heightened activity, with attackers deploying JSP web shells for command execution and data theft. CISA added it to its Known Exploited Vulnerabilities catalog, the first-ever PTC product to be listed, with a federal deadline of June 28. PTC has published indicators of compromise.
CISA has confirmed active exploitation of four critical flaws in Ubiquiti UniFi OS and Lantronix EDS5000 devices, adding them to its Known Exploited Vulnerabilities catalog with a June 26 deadline for federal agencies. Three UniFi OS bugs (CVE-2026-34908, CVE-2026-34909, CVE-2026-34910), each rated 10.0, can be chained for unauthenticated remote code execution and root; attackers were seen creating rogue admin accounts. The Lantronix flaw (CVE-2025-67038) is an unauthenticated root command injection in the EDS5000 serial console server. Ubiquiti patched UniFi OS Server in version 5.0.8, and Lantronix in firmware 2.2.0.0R1. Compromised network appliances let attackers pivot deep into internal networks.
A critical Splunk Enterprise flaw disclosed earlier this month is now being exploited in the wild, and CISA has added it to its known-exploited list with a June 21 federal patch deadline. The bug (CVE-2026-20253, rated 9.8) is a missing-authentication issue in a PostgreSQL sidecar service: an unauthenticated, network-reachable attacker can create or truncate arbitrary files on the Splunk host, which can cascade into log corruption, broken monitoring, and remote code execution. Both Splunk and Resecurity have confirmed active exploitation, and a public proof-of-concept and Nuclei template exist. Because Splunk underpins many SOC and SIEM operations, a compromise can blind defenders.
CISA has warned that attackers are actively exploiting CVE-2026-28318, a high-severity SolarWinds Serv-U denial-of-service flaw, and added it to the Known Exploited Vulnerabilities catalog. Serv-U is SolarWinds' Windows and Linux managed-file-transfer and FTP software. The flaw is an uncontrolled-resource-consumption weakness: specially crafted POST requests using Content-Encoding: deflate crash the Serv-U service without authentication, in low-complexity attacks needing no user interaction. SolarWinds shipped Serv-U 15.5.4 Hotfix 1 and advised admins who cannot patch to restrict access and block POST requests containing content-encoding. Shodan tracks over 12,000 exposed Serv-U servers (Shadowserver around 3,100). FCEB agencies must patch by June 19 under BOD 22-01.
Google has released the June 2026 Android security patches addressing 124 vulnerabilities, including CVE-2025-48595, a high-severity Android Framework flaw under limited, targeted exploitation. Local attackers can abuse it to gain code execution and escalate privileges on Android 14 or later. Google fixed 18 critical vulnerabilities this cycle across System, Framework, and Qualcomm closed-source components; the most severe is a critical Framework flaw enabling remote privilege escalation with no user interaction. Two patch levels shipped (2026-06-01 and 2026-06-05). CISA added CVE-2025-48595 to its KEV catalog the same day. Pixel devices get updates immediately; other vendors typically lag. Similar Android Framework flaws have historically been abused by commercial spyware.
CISA has added CVE-2022-0492 to its Known Exploited Vulnerabilities catalog based on evidence of active exploitation. The four-year-old Linux kernel flaw is an improper-authentication issue in the cgroups v1 release_agent feature that can be abused for container escape and privilege escalation to root on the host. It is well known among container-security researchers as a path to breaking out of misconfigured containers lacking AppArmor/SELinux or seccomp restrictions. Its appearance on KEV signals active in-the-wild abuse, likely in cloud and container environments. FCEB agencies must remediate by the BOD 22-01 deadline; all organizations running container workloads on older kernels should patch and verify hardening immediately.
CISA has added CVE-2024-21182, an unspecified vulnerability in Oracle WebLogic Server, to its Known Exploited Vulnerabilities catalog based on evidence of active exploitation. WebLogic is a widely deployed Java EE application server that frequently sits on internet-facing infrastructure, making it a recurring target for initial access and cryptomining campaigns. Under Binding Operational Directive 22-01, Federal Civilian Executive Branch agencies must remediate KEV-listed flaws by the assigned deadline, and CISA urges all organizations to prioritize patching. Oracle addressed the flaw in a prior Critical Patch Update; organizations running unpatched WebLogic instances should apply the relevant CPU and audit for signs of exploitation immediately.
Palo Alto Networks has confirmed that CVE-2026-0257 (CVSS 7.8), a GlobalProtect authentication-bypass flaw in PAN-OS and Prisma Access, is under active exploitation. The flaw lets attackers bypass authentication and establish an unauthorized VPN connection; it affects firewalls with a GlobalProtect portal or gateway when authentication-override cookies are enabled and a specific certificate configuration exists. Rapid7 identified successful exploitation across numerous customers dating back to May 17, with a second wave on May 21, attributed to the same threat actor; in two cases the attacker received a VPN IP and reached the internal network. CISA added the CVE to its KEV catalog on May 29.
TrustStrike Labs