remote code execution | Breaking Cybersecurity News | The Hacker News

Microsoft has rolled out updates to fix a remote code execution vulnerability impacting SharePoint that could be exploited by bad actors in attacks without requiring any specialized conditions to be met. The vulnerability, tracked as CVE-2026-45659 , carries a CVSS score of 8.8. It has been assigned an important severity. "Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network," Microsoft said in an advisory released last week. Microsoft noted that the vulnerability could be triggered by any authenticated attacker, and that it does not require administrator or other elevated privileges. "In a network-based attack, an authenticated attacker, who has a minimum of Site Member permissions (PR:L), could execute code remotely on the SharePoint Server," the Windows maker added. Microsoft credited a researcher named MEOW for discovering and reporting the flaw. Updates have been released for th...

A now-patched high-severity security flaw affecting Digital Knowledge KnowledgeDeliver , a Learning Management System (LMS) popular in Japan, was exploited as a zero-day to deliver the Godzilla web shell and ultimately facilitate the deployment of Cobalt Strike Beacon. The vulnerability, tracked as CVE-2026-5426 (CVSS score: 7.5), stems from the use of hard-coded ASP.NET machine keys, leading to unauthenticated remote code execution via a ViewState deserialization attack. The abuse of publicly disclosed ASP.NET machine keys by threat actors was first documented by Microsoft in February 2025. "An unknown threat actor leveraged this access to inject malicious code into the LMS platform, with the goal of infecting users visiting the site," Google Mandiant and Google Threat Intelligence Group (GTIG) said . The security flaw impacted Digital Knowledge KnowledgeDeliver deployments prior to February 24, 2026. It's worth noting that similar vulnerabilities in Sitecore Ex...

A new "coordinated" supply chain attack campaign has impacted eight packages on Packagist including malicious code designed to run a Linux binary retrieved from a GitHub Releases URL. "Although the affected packages were all Composer packages, the malicious code was not added to composer.json," Socket said . "Instead, it was inserted into package.json, targeting projects that ship JavaScript build tooling alongside PHP code." This "cross-ecosystem placement" makes the activity stand out because developers and security teams scanning PHP dependencies may only focus on Composer-related metadata, while skipping package.json lifecycle hooks that are bundled within the package. The malicious versions have since been removed from Packagist. An analysis of the packages has uncovered that their upstream repositories have been modified to include a postinstall script that attempts to download a Linux binary from a GitHub Releases URL ("github[...

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added a recently patched critical security flaw impacting Drupal Core to its Known Exploited Vulnerabilities ( KEV ) catalog, based on evidence of active exploitation. The vulnerability in question is CVE-2026-9082 (CVSS score: 6.5), an SQL injection vulnerability affecting all supported versions of Drupal Core. "Drupal Core contains a SQL injection vulnerability that could allow for privilege escalation and remote code execution via specially crafted requests sent with the database abstraction API," CISA said. News of exploitation arrives less than two days after Drupal released fixes for the flaw. Patches are available for the following versions - Drupal 11.3.10 Drupal 11.2.12 Drupal 11.1.10 Drupal 10.6.9 Drupal 10.5.10 Drupal 10.4.10 Drupal 9.5 (Manual patching required) Drupal 8.9 (Manual patching required) In an update to its advisory on May 22, 2026, Drupal acknowl...

Microsoft has disclosed that a privilege escalation and a denial-of-service flaw in Defender has come under active exploitation in the wild. The former, tracked as CVE-2026-41091 , is rated 7.8 on the CVSS scoring system. Successful exploitation of the flaw could allow an attacker to gain SYSTEM privileges. "Improper link resolution before file access ('link following') in Microsoft Defender allows an authorized attacker to elevate privileges locally," Microsoft said in an advisory. The second vulnerability under exploitation is CVE-2026-45498 (CVSS score: 4.0), a denial-of-service bug impacting Defender. The two vulnerabilities have been addressed in Microsoft Defender Antimalware Platform versions 1.1.26040.8 and 4.18.26040.7, respectively. Although Microsoft has not formally confirmed, the vulnerability descriptions for CVE-2026-41091 and CVE-2026-45498 overlap with that of RedSun and UnDefend , two Defender zero-days that were disclosed by Chaotic Eclips...