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CVE-2025-2776

CriticalPublished

SysAid On-Prem <= 23.3.40 serverurl Proceessing XML External Entity Injection

Published: May 7, 2025
Updated: Nov 19, 2025
Assigning CNA: VulnCheck
Evidence observed: Jul 22, 2025

Primary CVSS

9.8/ 10Critical

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS probability estimate

64.4%

High · next 30 days

Percentile: 99.2%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

CISA Known Exploited

This CVE appears in the CISA Known Exploited Vulnerabilities catalog.

Summary

SysAid On-Prem versions <= 23.3.40 are vulnerable to an unauthenticated XML External Entity (XXE) vulnerability in the Server URL processing functionality, allowing for administrator account takeover and file read primitives.

Sources

watchTowr-vs-SysAid-PreAuth-RCE-ChainExploit
PoC for SysAid PreAuth RCE Chain (CVE-2025-2775, CVE-2025-2776, CVE-2025-2777, CVE-2025-2778)
From-EternalBlue-to-CVE-2025-2776-The-Evolution-of-an-SMB-AttackResearch
It shook the world in 2017 and has evolved into today’s CVE‑2025‑2776. Microsoft still relies on SMBv1, this article will explain how attackers have tweaked the chain from a simple DLL to a full reverse‑shell stack, and what that means for the defenders.

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