CVE-2026-22553

InSAT MasterSCADA BUK-TS OS Command Injection

CVSS 9.3 CRITICALEPSS 1.4%CWE-78

Vexday Risk Score

48Attention

SSVC decision (CISA)

Attend

PoC available → attend closely

CVSS 9.3EPSS 1.4%KEV nãoPoC públicaNuclei —Metasploit —Patch —

Lifecycle

24 Feb 2026Published on NVD

14 May 2026Public PoC

Recommendation: Plan a near-term fix — a public PoC already exists.

All versions of InSAT MasterSCADA BUK-TS are susceptible to OS command injection through a field in its MMadmServ web interface. Malicious users that use the vulnerable endpoint are potentially able to cause remote code execution.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Affected products

InSAT · MasterSCADA BUK-TS

public PoCs found — 1

githubgithub.com/mbanyamer/CVE-2026-22553-InSAT-MasterSCADA-BUK-TS-MMadmServ★ 0

⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

References

https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-055-01.json https://www.cisa.gov/news-events/ics-advisories/icsa-26-055-01