All news with #remote code execution tag

⚠️ A critical remote code execution vulnerability has been disclosed in protobuf.js, the widely used JavaScript implementation of Google's Protocol Buffers, caused by unsafe dynamic code generation that concatenates schema-derived identifiers into functions. An attacker who can supply or influence schemas can inject arbitrary JavaScript into a generated Function() call, which executes when the crafted schema is processed. Maintainers and Endor Labs urge immediate upgrades to patched releases and recommend treating schema-loading as untrusted while auditing transitive dependencies.

⚠️ CISA has added CVE-2026-34197 to its Known Exploited Vulnerabilities catalog after active exploitation reports targeting Apache ActiveMQ Classic. The flaw is an improper input validation issue that can enable code injection via the Jolokia management API, potentially allowing arbitrary OS command execution. While the bug typically requires credentials, default credentials and a prior authentication bypass in some versions can render it effectively unauthenticated. Users should upgrade to ActiveMQ 5.19.4 or 6.2.3 to remediate the issue.

⚠️ Administrators using Cisco Webex Services with SSO integrated via Control Hub must upload a new identity provider (IdP) SAML certificate to remediate a critical impersonation vulnerability (CVE-2026-20184). Cisco has patched the cloud-side service, but affected customers must perform the configuration change in Control Hub; there are no workarounds. Cisco also released critical fixes for ISE and ISE-PIC addressing remote code execution and path traversal flaws that require patching and credential hygiene.

⚠️ Researchers at OX Security warn that a design decision in Anthropic’s reference Model Context Protocol (MCP) STDIO implementation may permit remote code execution (RCE) when client applications start local MCP servers without proper command filtering. The flaw stems from SDKs accepting arbitrary STDIO commands as subprocess arguments, which many adapters and tools inherit. Anthropic and other framework maintainers say this behavior is by design and that application developers must sanitize inputs, but OX found few effective defenses and demonstrated RCE across numerous projects and services.

⚠️Researchers observed attackers exploiting a critical Marimo remote code execution flaw (CVE-2026-39987) to deploy a new NKAbuse variant hosted on Hugging Face Spaces. Attack activity began within hours of public disclosure, with a Space named "vsccode-modetx" serving a dropper script and a malicious binary labeled kagent. The dropper retrieves and runs the payload via curl, then installs persistence via systemd, cron, or macOS LaunchAgent, while Spaces' legitimate HTTPS hosting helps evade detection. Operators are urged to upgrade to version 0.23.0 or block the '/terminal/ws' endpoint if upgrades are not possible.

⚠️ CISA published an advisory describing multiple critical vulnerabilities in Anviz products, including CX2 Lite, CX7, and CrossChex Standard. Issues range from unauthenticated firmware uploads and command injection to credential exposure and cleartext administrative sessions, any of which can lead to remote code execution and full device compromise. The advisory lists numerous CVEs with example CVSS up to 9.8 and notes no vendor response; organizations are urged to isolate affected devices and apply defensive mitigations immediately.

🛡️ Cisco has released updates to address four critical vulnerabilities across Webex Services and Identity Services Engine (ISE) that could permit arbitrary code execution and user impersonation. A cloud-side SSO certificate validation flaw (CVE-2026-20184, CVSS 9.8) can allow unauthenticated impersonation, while three ISE input validation issues (CVE-2026-20147, CVE-2026-20180, CVE-2026-20186; CVSS 9.9) enable remote command or code execution when an attacker has appropriate credentials. Cisco provides specific patch levels and migration guidance and advises customers to apply updates or upload a new IdP SAML certificate to Control Hub where applicable.

🛡️ Microsoft released updates addressing 169 vulnerabilities across its product portfolio, including an actively exploited SharePoint spoofing flaw (CVE-2026-32201) and 168 additional issues rated from Low to Critical. The fixes primarily remediate privilege escalation, information disclosure, and remote code execution weaknesses, and include a high-severity IKEv2 RCE (CVE-2026-33824, CVSS 9.8) and a publicly known Microsoft Defender privilege escalation (CVE-2026-33825). Organizations are urged to prioritize patches for actively exploited CVEs and critical RCEs and to follow Microsoft and CISA guidance for mitigations.

🔒 Microsoft’s April Patch Tuesday addresses 167 vulnerabilities, including an actively exploited SharePoint Server zero-day and a critical Windows IKE remote code execution bug. Administrators should prioritize CVE-2026-32201 in SharePoint and the 9.8-rated CVE-2026-33824 in the Windows IKE service. Temporary mitigations—blocking UDP ports 500/4500 or restricting traffic to known peers—reduce risk but do not replace patching. Teams must also apply critical SAP fixes and validate Microsoft Defender and Active Directory protections.

🔒 Microsoft released its April 2026 Patch Tuesday addressing 165 vulnerabilities across Windows, Office, .NET and server components, including eight rated critical. Critical issues include a .NET DoS (CVE-2026-23666), Remote Desktop and Office use-after-free flaws that can lead to code execution (CVE-2026-32157, CVE-2026-32190), multiple Word local code-execution bugs (CVE-2026-33114, CVE-2026-33115), and an IKEv2 double-free enabling remote code execution (CVE-2026-33824). Talos notes SharePoint vulnerability CVE-2026-32201 is being exploited in the wild and has released Snort rules; administrators should prioritize exposed services and apply mitigations such as blocking UDP 500/4500 if IKE is unused.

🔒 Microsoft released its April 2026 Patch Tuesday addressing 167 vulnerabilities, including two zero-days and eight Critical flaws. The updates patch an actively exploited SharePoint Server spoofing bug (CVE-2026-32201) and a publicly disclosed Microsoft Defender elevation-of-privilege flaw (CVE-2026-33825) that can grant SYSTEM privileges. Multiple Microsoft Office RCEs exploitable via preview panes or malicious documents were fixed; administrators should prioritize installing these patches immediately.

⚠️ Two high-severity vulnerabilities in Composer's Perforce VCS driver (CVE-2026-40176, CVSS 7.8; CVE-2026-40261, CVSS 8.8) can enable arbitrary command injection when processing a malicious repository configuration or a crafted source reference. The issues affect releases prior to 2.9.6 and 2.2.27 and are fixed in those versions; users should upgrade immediately. If you cannot patch, inspect composer.json files for Perforce fields, restrict repositories to trusted sources, and avoid dist-preferred installs. Composer reported no evidence of public exploitation and disabled Perforce metadata publishing on Packagist.org as a precaution.

⚠️ A critical remote code execution vulnerability, tracked as CVE-2025-0520 (aka CNVD-2020-26585), is being actively exploited against unpatched instances of ShowDoc. The flaw is an unrestricted, unauthenticated file upload caused by improper file-extension validation, allowing attackers to deploy PHP web shells and execute arbitrary code. The bug was fixed in ShowDoc 2.8.7 (October 2020) and the project now ships as version 3.8.1, but researchers observed an exploit dropping a web shell on a U.S.-based honeypot and note more than 2,000 internet-facing instances, most located in China. Administrators should upgrade immediately and scan for signs of compromise.

⚠️ Microsoft’s April 2026 Patch Tuesday addresses 164 CVEs, including two zero-days and eight Critical vulnerabilities. The release focuses heavily on elevation-of-privilege flaws (57% of patches) and updates for Windows, Office and developer tools. Notable fixes include an exploited SharePoint spoofing zero-day (CVE-2026-32201), a disclosed Defender elevation-of-privilege issue (CVE-2026-33825), and several high‑risk RCEs; deploy patches promptly and apply recommended mitigations.

🔒 Adobe released an emergency security update to fix a zero-day tracked as CVE-2026-34621, which has been exploited since at least December to bypass Acrobat/Reader sandbox protections. The flaw lets malicious PDFs invoke privileged JavaScript APIs (for example util.readFileIntoStream() and RSS.addFeed()) to read local files and exfiltrate data with no user interaction beyond opening the file. Affected versions of Acrobat DC, Acrobat Reader DC and Acrobat 2024 have fixes available; Adobe urges users to update via Help > Check for Updates or by downloading the installer.

⚠️ A critical pre-authentication remote code execution vulnerability in Marimo (tracked as CVE-2026-39987) allows unauthenticated attackers to obtain a full interactive shell by connecting to the exposed /terminal/ws endpoint. The flaw affects all Marimo versions before 0.23.0 and was exploited in the wild within 9 hours and 41 minutes of disclosure. Sysdig observed an attacker steal cloud credentials in under three minutes. Update to 0.23.0 or block public access and rotate any exposed keys.

⚠️ A critical pre-auth remote code execution (RCE) in Marimo (CVE-2026-39987) permits unauthenticated access to an interactive shell via the /terminal/ws WebSocket endpoint in versions 0.20.4 and earlier. Sysdig observed exploitation beginning within 10 hours of the public disclosure, with attackers quickly harvesting .env files, cloud credentials and SSH keys. Marimo released v0.23.0 to patch the issue; users should upgrade immediately, restrict external access, monitor WebSocket connections, and rotate any exposed secrets.

⚠️ A critical pre-auth remote code execution flaw, CVE-2026-39987, in Marimo allowed unauthenticated attackers to obtain a full PTY shell via the /terminal/ws WebSocket endpoint. The issue affected all versions up to and including 0.20.4 and was addressed in Marimo 0.23.0. Security researchers at Sysdig observed exploitation within 9 hours and 41 minutes of public disclosure, with rapid credential-theft activity on a honeypot. Operators were able to explore the file system and access .env and SSH key files without requiring proof-of-concept code.

🔒 A compromised update for Smart Slider 3 Pro (v3.5.1.35) was delivered through the plugin’s official update channel on April 7, 2026, and remained accessible for roughly six hours before detection. Security firm Patchstack and maintainer Nextend confirmed unauthorized access to Nextend’s update infrastructure and a fully attacker-authored build was distributed. The trojanized update installs a multi-stage backdoor that provides pre-authenticated RCE, hidden administrative accounts, multi-location persistence, and automatic data exfiltration to a command-and-control domain; operators should update to v3.5.1.36 and audit affected sites. The free Smart Slider edition is not impacted.

⚠️ Researchers disclosed a critical remote code execution flaw in Apache ActiveMQ Classic that remained undetected for 13 years and can allow arbitrary system command execution. Tracked as CVE-2026-34197 with a CVSS score of 8.8, the bug affects Classic releases before 5.19.4 and 6.0.0 through 6.2.3; fixes were released in 5.19.4 and 6.2.3. Administrators should apply the updates, review Jolokia access controls, and inspect broker logs for indicators of compromise.