Two Critical Vulnerabilities With Live PoCs — Plus AWS AitM Phishing at 20-Minute Speed
Three Simultaneous High-Severity Threats
Your SOC needs to triage three distinct but concurrent threats this morning, each targeting a different layer of your infrastructure. Individually they're serious; together they represent the worst week for your perimeter, cloud, and endpoint management since the MOVEit campaign.
CVE-2026-27944: Nginx UI — Full Secret Store Dump Via One HTTP Request
Nginx UI's /api/backup endpoint requires zero authentication and returns the AES-256 encryption key and initialization vector in the X-Backup-Security response header. A single GET request yields everything needed to decrypt the backup — admin credentials, session tokens, SSL private keys, database secrets, and full Nginx configurations. A public PoC is live today.
| Attribute | Detail |
|---|---|
| CVE | CVE-2026-27944 |
| CVSS | 9.8 (Critical) |
| Auth Required | None |
| PoC Available | Yes — public as of today |
| Blast Radius | Admin creds, SSL private keys, DB secrets, session tokens |
If Nginx UI's management interface is reachable from the internet, assume scanning has already begun.
CVE-2026-1603: Ivanti EPM — Auth Bypass Now in CISA KEV
Ivanti Endpoint Manager's authentication bypass was patched in February but is now confirmed actively exploited and added to CISA's Known Exploited Vulnerabilities catalog as of March 9. An authentication bypass in your endpoint management platform is a worst-case scenario — it's the system that manages every other system. Any instance unpatched between February and now should be treated as compromised.
AWS Console AitM: 20-Minute Credential Exploitation
DataDog is tracking adversary-in-the-middle phishing campaigns targeting the AWS Console login panel where credential abuse happens within 20 minutes of initial compromise. This AitM approach defeats TOTP, SMS, and push-notification MFA. Only FIDO2/passkeys resist this attack. The Tycoon 2FA Europol takedown this week validates this isn't theoretical — it was a majority share of Microsoft-blocked phishing attempts.
If your AWS root accounts still use TOTP MFA, the 20-minute AitM window means you're one phishing email from full account compromise — FIDO2 is the only control that survives this attack class.
Fortinet: The Monthly Fire Drill Continues
SentinelOne published IR findings from companies compromised via recent FortiGate vulnerabilities. BishopFox published a detailed exploit chain for FortiClient EMS SQL injection (CVE-2026-21643). If you're running Fortinet at your perimeter, the exploit details are public and motivated attackers have them.
What to do
Run immediate asset discovery for Nginx UI instances across all environments. Restrict /api/backup to VPN-only access and apply MFA to management interfaces today.
Verify all Ivanti EPM instances are patched against CVE-2026-1603. If any were unpatched since February, initiate forensic investigation before redeploying.
Deploy FIDO2/passkeys on all AWS root accounts and privileged IAM users by end of week. Audit for any accounts still using TOTP or SMS MFA.
Cross-reference SentinelOne's published FortiGate IOCs against your Fortinet appliance logs. Verify FortiClient EMS patched against CVE-2026-21643.