Vulnerabilities
Windows Netlogon CVE-2026-41089: Unauthenticated RCE on Every Domain Controller
May Patch Tuesday's marquee bug is a stack-based buffer overflow in MS-NRPC that hands SYSTEM on any domain controller reachable over the network. Patch DCs first, before anything else.
Apache CloudStack CVE-2026-25077: Malicious Template Lands Code Execution on KVM Hosts
Apache CloudStack 4.20.3.0 and 4.22.0.1 ship fixes for seven flaws — the headliner lets any account user execute arbitrary code on KVM hypervisor hosts via a malicious template name.
Ivanti EPMM CVE-2026-6973 Hits CISA KEV as Federal Patch Deadline Passes
Ivanti confirms in-the-wild exploitation of CVE-2026-6973, an authenticated-admin RCE in Endpoint Manager Mobile. CISA gave federal agencies until May 10 to patch — that window has now closed.
Sentry CVE-2026-42354: Incomplete Fix Reopens SAML SSO Account Takeover
Sentry self-hosted is vulnerable again to cross-organization SAML account takeover, three months after CVE-2026-27197 was supposedly patched. Upgrade to 26.4.1.
Palo Alto PAN-OS CVE-2026-0300: Unauthenticated Root RCE on Captive Portal Under Active Exploitation
Palo Alto Networks PAN-OS User-ID Authentication Portal has an unauthenticated buffer overflow yielding root RCE on PA-Series and VM-Series firewalls. CVSS 9.3, in CISA KEV, federal patch deadline May 9, 2026.
Palo Alto PAN-OS CVE-2026-0300: Unauth Root RCE in Captive Portal Exploited as Zero-Day, CISA KEV Deadline May 9
Palo Alto PAN-OS captive portal buffer overflow (CVSS 9.3) under active exploitation gives unauthenticated attackers root on PA- and VM-Series firewalls. Patches don't ship until May 13 — mitigations only.
Apache httpd CVE-2026-23918: HTTP/2 Double-Free Puts Millions of Servers at RCE Risk
Critical double-free in mod_http2's early-reset path lets remote attackers crash or take over Apache 2.4.66. Patch shipped May 4 in 2.4.67.
Exim 4.99.2 Patches Four Mail Server Flaws: Heap Corruption via JSON Headers, DNS Poisoning, and SPA Auth Bugs
Exim 4.99.2 fixes four memory-safety bugs (CVE-2026-40684 through 40687) in the world's most-deployed MTA, including a JSON heap-write reachable from untrusted headers.
SimpleHelp Trio Hits CISA KEV as DragonForce Ransomware Tears Through MSP Fleets
CISA dragged three SimpleHelp RMM bugs into the KEV catalog with a May 8 federal deadline after DragonForce operators chained them to push ransomware across MSP customer fleets in a single shot.
Windows Shell CVE-2026-32202: Incomplete APT28 Patch Reopens Zero-Click NTLM Coercion
Microsoft confirms in-the-wild exploitation of CVE-2026-32202, a zero-click Windows Shell flaw born from an incomplete patch of an APT28 zero-day. Browsing a folder with a malicious LNK leaks Net-NTLMv2 hashes.
Copy Fail (CVE-2026-31431): A 732-Byte Python Script Roots Every Major Linux Distro Since 2017
A nine-year-old logic bug in the kernel's algif_aead crypto interface lets an unprivileged user plant four bytes anywhere in the page cache — including inside a setuid binary's cached pages. Root in seconds, no on-disk artifacts, breaks containers.
LiteLLM CVE-2026-42208: Pre-Auth SQLi in the AI Gateway, Exploited 36 Hours After Disclosure
A pre-authentication SQL injection in LiteLLM's auth path (CVSS 9.3) lets an unauthenticated attacker read and modify the proxy database — including upstream OpenAI and Anthropic API keys. First exploitation hit 36 hours after the advisory.
cPanel & WHM CVE-2026-41940: Critical Auth Bypass Triggers Global Hosting Lockdown
An unauthenticated CRLF-injection auth bypass in cPanel & WHM (CVSS 9.8) sent every major hosting provider into emergency port-blocking mode within hours of disclosure. All supported release tracks are affected.
CVE-2026-3854: A Single Git Push Owned GitHub.com — and 88% of Enterprise Servers Were Still Vulnerable at Disclosure
Wiz disclosed a CVSS 8.7 RCE in GitHub's internal git push pipeline. Any authenticated user could execute arbitrary commands on backend servers with one git push. 88% of Enterprise Server instances were still unpatched on disclosure day.
LMDeploy CVE-2026-33626: SSRF in LLM Inference Server Exploited 12 Hours After Disclosure, Honeypot Sees AWS IMDS Theft
A 7.5-severity SSRF in Shanghai AI Lab's LMDeploy LLM serving toolkit was hit in the wild within 12h31m of the GitHub advisory. Sysdig's honeypot caught an attacker using the vision-language image loader to scrape AWS instance metadata, then pivot to internal Redis and MySQL.
LMDeploy SSRF (CVE-2026-33626) Weaponized in 12 Hours to Loot GPU IAM Credentials
A Server-Side Request Forgery in LMDeploy's vision-language image loader turned LLM inference nodes into SSRF primitives for cloud metadata theft — exploited 12 hours and 31 minutes after disclosure.
Spinnaker Dual 10.0s: Echo SpEL and Clouddriver gitrepo RCE Gut Netflix's CD Platform (CVE-2026-32604, CVE-2026-32613)
Two critical (CVSS 10.0) RCE bugs in Spinnaker, disclosed April 21, 2026 with working PoCs: SpEL expression injection in Echo and shell injection in Clouddriver gitrepo artifacts. Any authenticated user pops the CD plane and walks out with every stored cloud credential.
Quest KACE SMA CVE-2025-32975: CVSS 10.0 SSO Auth Bypass Added to CISA KEV as Admin Takeover Campaign Continues
CISA added CVE-2025-32975 — a CVSS 10.0 SSO authentication bypass in Quest KACE Systems Management Appliance — to the KEV catalog on April 20, 2026. Federal agencies must patch by May 4. Exploitation has been in progress since March.
Cisco Catalyst SD-WAN Manager: Three CVEs Land on CISA KEV With April 28 Federal Deadline
CISA added CVE-2026-20122, CVE-2026-20128, and CVE-2026-20133 in Cisco Catalyst SD-WAN Manager (vManage) to the KEV catalog on April 20, 2026. Two of the three were confirmed exploited in the wild by Cisco PSIRT in March; together they let an attacker move from low-privilege API access to full vManage takeover.
RedSun and UnDefend: Two More Defender Zero-Days Dropped, All Three Now Exploited in the Wild
The same disgruntled researcher who dropped BlueHammer has now released RedSun and UnDefend. Huntress confirms all three Windows Defender zero-days are now being weaponized in hands-on-keyboard intrusions. Two remain unpatched.