What is CVE-2025-2776?

CVE-2025-2776 is a critical-severity vulnerability in Sysaid, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 9.3/10. Published 2025-05-07.

How severe is CVE-2025-2776?

Critical severity. CVSS v3 base score is 9.3 out of 10.

Is CVE-2025-2776 known to be exploited?

Yes. CVE-2025-2776 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-07-22), indicating it is being actively exploited. 9 public proof-of-concept repositories are indexed.

XXE in Sysaid

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.

Vulnerability class: XXE (XML External Entity)

Published 2025-05-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.3 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:L.

EPSS exploit prediction

EPSS: 0.647 (99.2th percentile), scored 2026-10-18.

High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.644 · newest: 0.647 · change: +0.003

Affected products

Sysaid
Sysaid On-Prem — versions 0

Weakness classification (CWE)

CWE-611 — Improper Restriction of XML External Entity Reference (XXE)

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2025-07-22. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2025-08-12.

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.

Public proof-of-concept exploits

References

documentation.sysaid.com/docs/24-40-60 (vendor-advisory, Release Notes)
labs.watchtowr.com/sysowned-your-friendly-rce-support-ticket/ (Exploit, Third Party Advisory, exploit)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)

Frequently asked questions

What is CVE-2025-2776?: CVE-2025-2776 is a critical-severity vulnerability in Sysaid, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 9.3/10. Published 2025-05-07.
How severe is CVE-2025-2776?: Critical severity. CVSS v3 base score is 9.3 out of 10.
Is CVE-2025-2776 known to be exploited?: Yes. CVE-2025-2776 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-07-22), indicating it is being actively exploited. 9 public proof-of-concept repositories are indexed.