The ShinyHunters data-theft wave against Oracle PeopleSoft, covered yesterday, now has a confirmed root cause: a zero-day. Oracle has issued an out-of-band emergency mitigation for CVE-2026-35273, a critical flaw (rated 9.8) in PeopleSoft PeopleTools that lets an unauthenticated attacker run code on the server over HTTP, with no login required. Google's Mandiant says the bug was exploited from May 27 to June 9, before any advisory existed, and notified more than 100 affected organizations, 68 percent of them universities. The exposed component is the Environment Management Hub. Affected versions are PeopleTools 8.61 and 8.62; a full patch is still pending.
The researcher known as Nightmare Eclipse has published a second unpatched Windows exploit in two days, this one defeating BitLocker disk encryption. Called GreatXML, it abuses the Windows Defender Offline Scan feature: any machine that has ever run an offline scan is left permanently vulnerable. An attacker with physical access copies a crafted unattend.xml file and a Recovery folder to the recovery partition, reboots into the Windows Recovery Environment with Shift plus Restart, and gets a privileged shell with full access to the encrypted drive, no login needed. Proof-of-concept code is public on GitHub, there is no patch yet, and Microsoft says it is investigating.
Microsoft's June 2026 Patch Tuesday is the largest on record, fixing more than 200 vulnerabilities (independent counts put the total above 206), including three publicly disclosed zero-days that are not yet being exploited. The standout is CVE-2026-45586, a Windows CTFMON elevation-of-privilege flaw that grants SYSTEM access, which matches the GreenPlasma bug a researcher dropped in protest of Microsoft's bug-bounty handling; a BitLocker bypass called YellowKey was also fixed. The update includes 33 critical flaws, most of them remote code execution, hitting Remote Desktop, Hyper-V, Office, and cryptographic services. Microsoft flagged 15 issues as more likely to be exploited soon.
Hours after Patch Tuesday, the researcher known as Nightmare Eclipse published a working exploit, dubbed RoguePlanet, for an unpatched Microsoft Defender flaw that opens a command prompt with full SYSTEM privileges on fully updated Windows 10 and 11. The bug is a race condition, so the exploit is hit or miss, but the researcher reports a 100 percent success rate on some machines. They posted the proof-of-concept on a self-hosted Git server after Microsoft had earlier taken down their GitHub and GitLab repositories. It is the latest in a string of Windows zero-days (BlueHammer, RedSun, YellowKey, GreenPlasma) the researcher has released in protest of Microsoft's disclosure practices.
Google has shipped an emergency Chrome fix for a zero-day in V8, the browser's JavaScript and WebAssembly engine, that attackers are already exploiting in the wild. The flaw (CVE-2026-11645, rated 8.8) is an out-of-bounds memory read and write that lets a malicious web page run code inside Chrome's sandbox, and can help defeat protections like ASLR to set up a fuller compromise. Google confirmed an exploit exists but withheld details until most users update. It is the fifth actively exploited Chrome zero-day of 2026. The fix is in Chrome 149.0.7827.102/103 for desktop; Chromium-based browsers like Edge and Brave need the same update.
Cisco has warned of an actively exploited, unpatched zero-day in Cisco Catalyst SD-WAN Manager (CVE-2026-20245) that enables root privilege escalation across all deployment types, including on-prem, Cloud, Managed, and FedRAMP Government. The flaw stems from insufficient validation of user-supplied input: an attacker who uploads a crafted file can perform command injection and run arbitrary commands as root. Exploitation requires netadmin privileges - obtained via valid credentials or by chaining CVE-2026-20182 or CVE-2026-20127. Mandiant reported the activity to Cisco's PSIRT in June. Cisco has observed limited cases where exploitation pushed configuration changes to edge devices, and published IoCs pointing to suspicious tenant-list uploads in scripts.log.
Security researcher Ammar Askar has released exploit code for an unpatched VS Code zero-day that lets attackers steal GitHub OAuth tokens with a single click. The flaw abuses VS Code's sandboxed webview message-passing system: malicious JavaScript in a webview simulates keypresses in the main editor to install a malicious extension that captures the GitHub OAuth token github.com POSTs to github.dev. The token is not scoped to a single repo - it grants full access to every private repository the victim can reach. No CVE has been assigned and there is no patch. Users can mitigate by clearing github.dev cookies and on-device site data, which restores the sign-in prompt.
Acer is working to patch two maximum-severity zero-days in its Wave 7 mesh routers running firmware T7c_GBL_1.01.000055 or earlier, reported by researcher Gergo Pap. CVE-2026-49200 is a broken-access-control flaw: the acer_cgi.log file is reachable without authentication via the web interface and contains cleartext web and Telnet login credentials, leading to unauthorized system access. CVE-2026-49201 stems from a hardcoded AES key in the upload.cgi backup-processing binary, letting unauthenticated remote attackers decrypt, modify, and re-encrypt system backups to inject a persistent backdoor. No patches are available yet; Acer targets fixes by the end of June 2026 and urges users to update immediately once released.
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.
Rapid7's Jonah Burgess has disclosed an unpatched argument-injection RCE in Gogs, the self-hosted Git service often used as a GitLab/GitHub Enterprise alternative. The flaw affects Gogs 0.14.2 and 0.15.0+dev and requires authentication, but Gogs ships with open registration enabled by default (DISABLE_REGISTRATION = false) and no repository creation limits, so any internet-facing default-configured instance is effectively unauthenticated-exploitable: an attacker creates an account and repo, enables rebase merging in settings, and the entire exploit chain runs without third-party interaction. Code execution lands as the Gogs server-process user. No CVE has been assigned and no patch is available; mitigations involve disabling open registration.
TrustStrike Labs