Critical severity · published Feb 22, 2026
CVE-2026-2952
Vaelsys HTTP POST Request tree_server.php os command injection
9.8
CVSS
8.4%
EPSS
No
On KEV
Description
A flaw has been found in Vaelsys 4.1.0. This vulnerability affects unknown code of the file /tree/tree_server.php of the component HTTP POST Request Handler. This manipulation of the argument xajaxargs causes os command injection. The attack is possible to be carried out remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)8.4% · higher than 95% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
VA
Vaelsys · Vaelsys
4.1.0 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-2952
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-2952
Exploit
https://github.com/CVE-Hunter-Leo/CVE/issues/10
Permissions Required
https://vuldb.com/?ctiid.347318
Third Party Advisory
https://vuldb.com/?id.347318
Third Party Advisory
https://vuldb.com/?submit.755166
More from Vaelsys
9.8
CVE-2025-8261
Vaelsys VaelsysV4 User Creation vgrid_server.php improper authorization
9.8
CVE-2025-8259
Vaelsys VaelsysV4 Web interface vgrid_server.php execute_DataObjectProc os command injection
7.5
CVE-2025-8260
Vaelsys VaelsysV4 Web interface vgrid_server.php weak hash