Exchange Server SSRF Vulnerability

By
Jijith Rajan
Published on
16 Jun 2021
Vulnerability

CVE-2021-26855 is a server-side-request-forgery (SSRF) vulnerability in the Microsoft Exchange server.HTTPS connections are established to authenticate user access when exploited.

Mitigation / Precaution

We suggest you to install all required patches, and avoid untrusted connections by enclosing the Exchange server within a VPN to isolate port 443 from external connections.

Automated human-like penetration testing for your web apps & APIs
Teams using Beagle Security are set up in minutes, embrace release-based CI/CD security testing and save up to 65% with timely remediation of vulnerabilities. Sign up for a free account to see what it can do for you.

Written by
Jijith Rajan
Jijith Rajan
Cyber Security Engineer
Experience the Beagle Security platform
Unlock one full penetration test and all Advanced plan features free for 10 days
Find surface-level website security issues in under a minute
Free website security assessment
Experience the power of automated penetration testing & contextual reporting.