Security Domain
Identity & Access Management
Authentication, authorization, access control models, identity federation, and MFA.
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← All domainsMicrosoft 365 Copilot 'SearchLeak' CVE-2026-42824 — One-Click Exfiltration of Emails, Files, and MFA Codes
Varonis Threat Labs chained three vulnerabilities in Microsoft 365 Copilot into a single attack that exfiltrates emails, corporate files, and MFA authentication codes from a victim's account with a single click on a malicious link. Microsoft patched all three flaws server-side; no client update is required, but the disclosure illuminates the structural risks of embedding AI systems with broad data access into enterprise environments.
SimpleHelp Remote Support: New OIDC Flaw Lets Unauthenticated Attackers Create Rogue Privileged Technician Accounts
A new authentication vulnerability in SimpleHelp Remote Support — distinct from the path traversal and privilege escalation flaws patched earlier in 2026 — allows an unauthenticated attacker to exploit a flaw in the OIDC single sign-on implementation to create privileged technician accounts with full remote session capabilities. SimpleHelp has released emergency patches; exploitation has been observed in the wild.
Windows DHCP Rogue Server Attacks: NAC and DHCP Guard Controls Against CVE-2026-44815
CVE-2026-44815 in the Windows DHCP Client enables SYSTEM-level RCE via a rogue DHCP server on the same broadcast domain. DHCP Snooping (DHCP Guard) on enterprise switches is the primary compensating control while patching proceeds, but its effectiveness depends on consistent enforcement across all access-layer switches and correct handling of edge cases like DHCP relay configurations.
Hardening Active Directory Against CVE-2026-47288 and the Kerberos Attack Surface
CVE-2026-47288 in the Windows Kerberos KDC is the most critical Active Directory vulnerability of 2026. Beyond patching, the Kerberos attack surface encompasses golden ticket attacks, AS-REP roasting, Kerberoasting, and credential relay. This article provides post-patch hardening guidance for enterprise AD environments.
Windows Kerberos KDC Remote Code Execution CVE-2026-47288 Puts Domain Controllers at Critical Risk
CVE-2026-47288 is a critical remote code execution vulnerability in the Windows Kerberos Key Distribution Centre that allows network-adjacent unauthenticated attackers to execute arbitrary code on Active Directory domain controllers. All supported Windows Server versions are affected. Domain controllers should be treated as the highest-priority patch target in the June 2026 update cycle.
Enterprise AI Tool Governance: Controlling Access, Data Flows, and Shadow AI Risk
The rollout of ChatGPT Lockdown Mode highlights the broader challenge of governing AI tool access in enterprise environments: organisations must balance productivity benefits against data loss risk, prompt-injection exposure, and the proliferation of unofficial AI tools used without IT oversight. This guide covers the IAM and DLP controls that define an enterprise AI governance posture.
DBIR 2026 Identity Chapter: Credential Theft Remains Dominant, MFA Bypass Techniques Accelerating
The identity and credential findings from Verizon's 2026 DBIR show that stolen credentials remain the most common enabler of breaches across all sectors, used in 44% of analysed incidents. More troubling: the DBIR documents a significant increase in MFA bypass techniques — adversary-in-the-middle phishing toolkits, SIM swapping, and push notification fatigue attacks that defeat MFA as commonly deployed.
Healthcare Ransomware and Identity: The IAM Controls That Limit Gentelman's Blast Radius
The Gentelman ransomware group gains initial access through RMM vulnerabilities, but its ability to encrypt an entire healthcare network depends on how identity and access management is configured. Strong IAM controls — privileged access segmentation, MFA enforcement on administrative accounts, and service account restrictions — significantly limit what a ransomware operator can encrypt once inside the perimeter.
Implementing the Active Directory Tier Model: A Practical Guide for Post-Netlogon Environments
Microsoft's Active Directory Tier Model separates administrative access by privilege level to prevent credential theft from cascading into full domain compromise. CVE-2026-41089's impact in poorly segmented environments makes the Tier Model the single highest-leverage post-incident investment. This guide covers the implementation sequence for organisations starting from scratch.
Identity Containment After Domain Controller Compromise: IAM Response for CVE-2026-41089 Post-Exploitation
If forensic investigation reveals CVE-2026-41089 exploitation occurred before patching, the identity response is as critical as the technical remediation. All credential material accessible from the domain controller must be treated as compromised. This guide covers the identity containment sequence for a confirmed Active Directory domain controller breach.
Domain Controller Hardening After Netlogon CVE-2026-41089: Reducing the Attack Surface Beyond Patching
Patching CVE-2026-41089 closes the specific vulnerability, but domain controllers remain highly targeted infrastructure. This guide covers the access control, network segmentation, and monitoring controls that reduce DC attack surface against the class of unauthenticated RCE threats that Netlogon represents.
SASL Authentication Security in Enterprise Mail Servers: Deprecating DIGEST-MD5 and Hardening SMTP AUTH
The GNU SASL CVE-2026-48829 DIGEST-MD5 crash is a reminder that legacy authentication mechanisms in enterprise mail infrastructure carry risk that is often invisible to security teams. A structured review of SASL mechanism configuration in Postfix, Dovecot, and Exchange environments can eliminate entire vulnerability classes while improving authentication security.
VPN Authentication Bypass: Identity and Access Containment Response After GlobalProtect Compromise
When a VPN authentication bypass like CVE-2026-0257 is exploited, the attacker enters the network without leaving identity provider audit trails. Standard identity-based detection misses the initial access. This creates a specific response challenge: containing a network breach where the entry event did not generate authentication telemetry and the scope of subsequent access is unknown.
Pwn2Own Week Exposes the Limits of Identity as a Security Control — What IAM Teams Should Review
The week of 12–18 May 2026 produced two distinct scenarios where identity controls — Conditional Access, MFA, and Zero Trust enforcement — provided no meaningful protection: Exchange Server-side RCE (operating below the authentication layer) and Exchange OWA session hijacking (stealing tokens after authentication). Both are active or imminent threats. Both require defences that go beyond the identity layer.
Why Exchange SYSTEM RCE Bypasses Conditional Access and MFA: The Authentication Architecture Problem
The Exchange SYSTEM RCE chain demonstrated by DEVCORE at Pwn2Own Berlin 2026 achieves code execution at the operating system level, bypassing all identity controls including Conditional Access policies, MFA requirements, and Azure AD authentication entirely. Understanding why server-side RCE renders identity controls irrelevant is essential for accurate risk assessment.
Microsoft Reverses Course on Edge Plaintext Password Exposure — Update Will Prevent Loading Saved Passwords into Process Memory
Following disclosure on 11 May that Microsoft Edge loads saved passwords as plaintext into process memory at startup, Microsoft confirmed it will release a patch preventing password data from being loaded into memory outside of active use contexts. The fix addresses the specific vulnerability class that allows process memory dumpers to extract Edge-saved credentials without user interaction.
Fortinet Patches Critical Vulnerabilities in FortiAuthenticator and FortiSandbox — Enterprise SSO and Security Infrastructure at Risk
Fortinet released patches for critical vulnerabilities in FortiAuthenticator and FortiSandbox as part of the May 2026 patch cycle. FortiAuthenticator flaws can enable authentication bypass and session manipulation in enterprise SSO deployments, while FortiSandbox issues affect the analysis platform. Apply patches immediately given Fortinet's established exploitation history.
VENOM Phishing Kit Targets Senior Microsoft 365 Executives via AiTM Session Interception
A new phishing-as-a-service platform named VENOM is specifically targeting C-suite and senior executive Microsoft 365 accounts using adversary-in-the-middle (AiTM) infrastructure to intercept authenticated sessions. Unlike generic phishing kits, VENOM's targeting logic filters for high-value accounts — CFOs, CEOs, legal counsel, and board-level contacts — and includes executive-tailored lures designed for low suspicion.
OpenAI Launches Advanced Account Security Programme with Mandatory Phishing-Resistant MFA
OpenAI has announced an opt-in Advanced Account Security programme for high-risk users — journalists, human rights advocates, executives, and researchers — offering phishing-resistant FIDO2 hardware key and passkey authentication, stricter account recovery controls, and session compromise mitigations. The programme, developed in partnership with Yubico, acknowledges that standard MFA is insufficient against sophisticated phishing and AiTM attacks targeting OpenAI accounts with access to sensitive workflows.
Ivanti EPMM CVE-2026-6973 — Remote Code Execution Added to CISA KEV, Patch Required
Ivanti has disclosed CVE-2026-6973, a remote code execution vulnerability in Endpoint Manager Mobile (EPMM, formerly MobileIron) that has been added to the CISA Known Exploited Vulnerabilities catalogue following confirmed limited exploitation. EPMM is a mobile device management platform used by government agencies and enterprises. Organisations should apply the available patch and audit administrator account activity. EPMM has a prior history of critical exploitation including the 2023 Norwegian government attack.
GoDaddy ManageWP Credentials Targeted by AiTM Phishing Campaign via Malicious Google Ads
A real-time adversary-in-the-middle phishing campaign is targeting GoDaddy ManageWP administrators through malicious Google search advertisements that appear above legitimate results for ManageWP login queries. The campaign steals session tokens via a real-time proxy, bypassing MFA, and uses Telegram for credential exfiltration. Each compromised ManageWP account typically controls hundreds of WordPress sites, making this a high-leverage credential theft campaign.
Cordial Spider and Snarky Spider Drive Multi-Sector SaaS Account Takeover via Vishing and SSO AiTM Attacks
Two newly-designated threat actor clusters — Cordial Spider (UNC6671) and Snarky Spider (UNC6661) — are conducting coordinated vishing and adversary-in-the-middle SSO phishing campaigns against enterprise organisations across finance, technology, and logistics sectors, bypassing MFA to harvest persistent OAuth tokens. Organisations should review SSO conditional access policies and verify help desk vishing verification procedures.
ConsentFix v3 Automates Azure OAuth Abuse at Scale — MFA-Bypassing Phishing Platform Circulating on Forums
The third iteration of the ConsentFix Azure OAuth phishing toolkit has been observed circulating on cybercriminal forums, adding Pipedream-powered automation to the consent flow abuse technique that allows attackers to gain persistent access to Microsoft 365 tenants without requiring MFA. Enterprise security teams should review conditional access policies governing OAuth app registrations and user consent.
Scattered Spider's 'Tylerb' Pleads Guilty — Senior Member Faces 20 Years for $8M SIM Swap and Enterprise Breaches
Tyler Robert Buchanan, 24, known online as 'Tylerb', has pleaded guilty to wire fraud conspiracy and aggravated identity theft for his role in Scattered Spider's 2022 SMS phishing and SIM-swapping campaign that breached Twilio, LastPass, DoorDash, Cloudflare, and at least 130 other organisations. The guilty plea represents a significant law enforcement milestone against the English-language cybercrime group responsible for the MGM and Caesars casino breaches.