CVE-2025-2777Public exploitNetwork attack vector

Administrator takeover via unsafe lshw XML parsing

Published May 7, 2025 · Updated Feb 26, 2026

XXE in SysAid On-Premises 23.3.40 and earlier allows remote attackers to read files and take over administrator accounts via /lshw. The LshwAgent handler passes unauthenticated POST body data to a SAXParser without disabling external entities, allowing attacker-controlled entity resolution. No login is required; blind entity callbacks can exfiltrate suitable single-line local files, including the installer-created file containing the main administrator credentials.

CVSS severity9.3
Critical
EPSS probability72.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

XXE in SysAid On-Premises 23.3.40 and earlier allows remote attackers to read files and take over administrator accounts via /lshw. The LshwAgent handler passes unauthenticated POST body data to a SAXParser without disabling external entities, allowing attacker-controlled entity resolution. No login is required; blind entity callbacks can exfiltrate suitable single-line local files, including the installer-created file containing the main administrator credentials.

The record

CVE
CVE-2025-2777
Published
May 7, 2025
Updated
Feb 26, 2026
Vendor
SysAid
Product
SysAid On-Premises
Classifications
CWE-611, T1005, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 7, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=23.3.40

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

SysAid · SysAid On-Premisesversion=0 <=23.3.40

Published CVSS scores

9.3VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:L
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-611Improper Restriction of XML External Entity Reference
T1005Data from Local System
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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