Topic
CISA
CISA Adds MikroTik RouterOS Flaws CVE-2026-67277 and CVE-2026-86060 to Known Exploited Vulnerabilities Catalog
Vulnerabilities & Exploits
CISA Adds Four Actively Exploited Vulnerabilities to KEV Catalog Including Cisco FMC and Fortinet FortiOS
Vulnerabilities & ExploitsCritical Vulnerabilities in PaperCut NG and PaperCut MF Exploited in the Wild
Vulnerabilities & ExploitsOver 8,300 Gitea Servers Remain Exposed to Remote Code Execution via CVE-2026-60004
Thousands of publicly accessible Gitea instances were still unpatched against CVE-2026-60004 as of late August 2026, leaving them open to remote command execution. The critical vulnerability combines abuse of the diffpatch endpoint with the ability to install and trigger attacker-controlled Git hooks, allowing unauthenticated attackers to run commands on the server. Exploitation requires only write access to a repository, which is often trivial due to default open user registration in many deployments. The issue was fixed in Gitea 1.27.1 released on July 27, 2026, and CISA added the flaw to its Known Exploited Vulnerabilities catalog with a remediation deadline of August 28 for U.S. federal agencies. In observed incidents, attackers used the access to deploy cryptocurrency miners inside Docker containers. A related authentication bypass affecting the official Docker image, CVE-2026-20896, was also noted when reverse-proxy headers such as X-WEBAUTH-USER are enabled.
CISA Adds Actively Exploited Zimbra CVE-2026-73570 to KEV Catalog with Immediate Patching Deadline
CISA has added CVE-2026-73570 affecting Zimbra Collaboration Suite to its Known Exploited Vulnerabilities catalog, ordering urgent remediation due to confirmed active exploitation. The flaw enables unauthenticated remote command execution on servers where the optional zimbra-snmp package is installed and SNMP notifications are enabled. Exploitation occurs via specially crafted SMTP requests that trigger operating system command injection under the privileges of the zimbra user. Zimbra released the fix in version 10.1.20 on July 20, 2026, while CISA placed the vulnerability in the KEV list on August 21 and set an August 24 deadline for federal civilian agencies. Organizations are advised to first verify exposure by checking for zimbra-snmp and SNMP notification settings before applying the update. Post-patch steps include validating the version, controlled service restarts, and hunting for indicators such as unexpected Zimbra restarts, anomalous zimbra user activity, and new files in sensitive directories like /opt/zimbra/jetty/webapps/. The directive highlights the critical nature of pre-authentication flaws in internet-facing mail servers that process untrusted inbound traffic.
CISA Adds Zimbra Collaboration Suite CVE-2026-73570 to KEV Catalog After Confirmed Exploitation
US authorities have issued a warning about active exploitation of a vulnerability in the Zimbra Collaboration Suite. CISA added the OS command injection flaw CVE-2026-73570 to its Known Exploited Vulnerabilities catalog on August 21, 2026, marking the fifth such entry for the year. The issue resides in the SNMP monitoring component and allows unauthenticated attackers to execute arbitrary operating system commands with Zimbra user privileges when SNMP notifications are enabled. MITRE rated the vulnerability 8.9 on CVSS v3.1, classifying it as High severity. Federal agencies must apply mitigations by August 24, while all organizations using the product are urged to prioritize patching to prevent further abuse.
JetBrains TeamCity CVE-2026-63077 Actively Exploited in the Wild, JPCERT Urges Immediate Patching and Breach Investigation
A critical deserialization vulnerability tracked as CVE-2026-63077 has been discovered in JetBrains TeamCity, allowing unauthenticated remote code execution through the agent polling protocol. The flaw was privately reported to JetBrains on July 10, 2026, and publicly disclosed on July 27 with patches released in TeamCity 2026.1.3 and 2025.11.7. Following disclosure, active exploitation was confirmed, prompting CISA to add the vulnerability to its Known Exploited Vulnerabilities Catalog on August 5 and mandate federal agencies to remediate by August 8. JetBrains issued its own exploitation warning on August 7. JPCERT/CC has verified that affected versions remain in use within Japan and notes that public exploit code is now available, recommending organizations verify their deployments, apply updates promptly, and conduct compromise assessments.
CISA Adds JetBrains TeamCity CVE-2026-63077 to Known Exploited Vulnerabilities Catalog After Active Attacks
The US Cybersecurity and Infrastructure Security Agency has added a critical vulnerability in JetBrains TeamCity to its Known Exploited Vulnerabilities catalog due to confirmed exploitation in the wild. The flaw, tracked as CVE-2026-63077, stems from unsafe deserialization of untrusted data over the agent polling protocol and permits unauthenticated remote code execution. TeamCity is widely used for automating software build, test, and deployment pipelines in development environments. CISA directed all US federal agencies to apply vendor mitigations within three days, by August 8, 2026. Organizations running the continuous integration server are urged to review exposure and implement the recommended fixes immediately to prevent further compromise.
SOC Incident Analysis Exposes Active Exploitation of CVE-2025-53770 SharePoint ToolShell Auth Bypass and RCE
A detailed walkthrough of Letsdefend SOC342 demonstrates how analysts detected and confirmed exploitation of CVE-2025-53770 targeting SharePoint servers. The alert was triggered by a suspicious unauthenticated POST request to ToolPane.aspx carrying an unusually large payload and a spoofed referer. Investigation revealed that the vulnerable server accepted the request, after which PowerShell commands extracted ASP.NET cryptographic keys, enabling ViewState forgery and remote code execution. Attackers then compiled and dropped additional payloads using csc.exe and created a malicious spinstall0.aspx page that leveraged WScript.Shell to download further malware. Network indicators included the malicious IP 107.191.58.76 flagged by CISA and multiple VirusTotal detections. The server was isolated, files removed, and cryptographic keys rotated to contain the breach.
Russian State-Supported Group LAUNDRY BEAR Exploits Zero-Day CVE-2025-66376 in Zimbra Collaboration Suite
Synacor’s Zimbra Collaboration Suite was targeted in a zero-day campaign by the Russian state-backed threat actor known as LAUNDRY BEAR. The stored cross-site scripting flaw in the webmail stylesheet handler allowed attackers to steal past emails simply by having victims view a specially crafted HTML message. No user interaction beyond opening the email was required for JavaScript execution in the browser. On 23 July 2026, sixteen countries including the United States, European nations and Australia issued a joint advisory signed by twenty-seven agencies such as NSA, FBI and CISA. The vulnerability received CVE-2025-66376 and a CVSS v3.1 base score of 7.2, rated High. Analysts assess the campaign focused on intelligence collection against Western government and corporate targets.
CISA Adds Three Exploited Vulnerabilities in FortiSandbox and SharePoint to KEV Catalog
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added three actively exploited vulnerabilities to its Known Exploited Vulnerabilities (KEV) catalog on July 16, 2026. Two of the flaws affect Fortinet’s FortiSandbox malware analysis product and involve OS command injection issues that can be triggered via specially crafted HTTP requests without requiring authentication. The third vulnerability impacts Microsoft SharePoint and stems from unsafe deserialization of untrusted data, potentially allowing remote code execution over the network. CISA’s action follows public advisories released by the vendors in April and June 2026. The agency is urging organizations to apply available patches and mitigations immediately to reduce the risk of compromise.
CISA Urges Immediate Patching as Multiple SharePoint Server Vulnerabilities Confirmed Exploited
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has issued an urgent advisory after confirming active exploitation of multiple vulnerabilities in Microsoft SharePoint Server. Four specific CVEs have been added to the Known Exploited Vulnerabilities (KEV) catalog, with one additional flaw flagged by Microsoft as high-risk even without confirmed exploitation. Successful attacks can lead to remote code execution, theft of Internet Information Services (IIS) machine keys, establishment of persistent access, and deployment of malware. CISA recommends applying the latest Microsoft patches immediately, verifying successful installation, enabling the Antimalware Scan Interface (AMSI), and strengthening monitoring through Microsoft Defender Antivirus. Organizations are also advised to avoid direct internet exposure of SharePoint servers and to implement Layer 7 reverse proxies with enhanced logging to reduce the attack surface.
SonicWall Issues Emergency Hotfixes After Detecting Active Exploitation of Two Zero-Day Vulnerabilities in SMA1000 Appliances
SonicWall has confirmed active exploitation of two zero-day vulnerabilities in its SMA1000 series appliances, prompting the immediate release of hotfixes and a strict compliance deadline for U.S. federal agencies. The first flaw, CVE-2026-15409, carries a critical CVSS score of 10.0 and allows unauthenticated server-side request forgery (SSRF) through the Appliance Work Place interface, enabling attackers to force the device to make unauthorized requests to internal services. The second vulnerability, CVE-2026-15410, rated CVSS 7.2, permits authenticated code injection via the Appliance Management Console, allowing administrators to execute operating system commands. Affected models include SMA6210, SMA7210, and SMA8200v running specific vulnerable platform versions such as 12.4.3-03245 through 12.5.0-02800. CISA has added both CVEs to its Known Exploited Vulnerabilities catalog, requiring federal agencies to patch or decommission impacted systems by July 17, 2026. Indicators of compromise and recommended response actions, including log analysis and potential appliance reimaging, have been published to help organizations detect and mitigate potential intrusions.