SysAid On-Prem Improper Restriction of XML External Entity Reference Vulnerability
SysAid — SysAid On-Prem
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.
9.3
64.4%
Vector breakdown
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Changed
- Confidentiality
- High
- Integrity
- None
- Availability
- Low
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:L
- Published
- May 7, 2025
- Modified
- Jun 17, 2026
- Added to KEV
- Jul 22, 2025
- Federal patch due
- Aug 12, 2025
CISA required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Weakness classification
Affected packages
Proof-of-concept & exploitation references
2 foundWeaponization
Public repositories whose name or description references CVE-2025-2776, found via a live GitHub search at request time. These are community-sourced signals, not a verified working exploit - cross-check each one before relying on it, and treat higher star counts and recent activity as (weak) corroboration, not proof.
- watchtowrlabs/watchTowr-vs-SysAid-PreAuth-RCE-Chain★ 12
PoC for SysAid PreAuth RCE Chain (CVE-2025-2775, CVE-2025-2776, CVE-2025-2777, CVE-2025-2778)
updated Jan 13, 2026
- mrk336/From-EternalBlue-to-CVE-2025-2776-The-Evolution-of-an-SMB-Attack★ 0
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.
updated Aug 31, 2025
References
How this class of flaw gets exploited
Frequently asked questions
What is CVE-2025-2776?
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.
How severe is CVE-2025-2776?
CVE-2025-2776 has a CVSS base score of 9.3 out of 10 (CVSS 3.1).
Is CVE-2025-2776 actively exploited in the wild?
Yes. CVE-2025-2776 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added Jul 22, 2025, meaning CISA has confirmed evidence of active exploitation.
What is the EPSS score for CVE-2025-2776?
64.4% - meaning FIRST.org's EPSS model estimates a 64.4% probability this vulnerability will be exploited in the wild within 30 days (99% percentile among all scored CVEs).
Is there exploit tooling available for CVE-2025-2776?
Yes - a public Nuclei template referencing CVE-2025-2776 exist in public repositories we checked. We also found 2 public GitHub repositories referencing this CVE.
What type of vulnerability is CVE-2025-2776?
CVE-2025-2776 is classified under CWE-611 (CWE-611 Improper Restriction of XML External Entity Reference).
Cross-checked against
Impactr finds and proves whether CVE-2025-2776 - or flaws like it - are actually reachable in your own web apps and APIs, with a reproducible exploit as evidence.
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