Review reviewHigh

CVE-2026-20766

Milesight MS-Cxx63-PD, MS-Cxx64-xPD, MS-Cxx73-xPD

An out-of-bounds memory access vulnerability exists in specific firmware versions of Milesight AIOT cameras.

PRIORITY ASSESSMENT

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability0.29%

Technical severityCVSS 8.6

An out-of-bounds memory access vulnerability exists in specific firmware versions of Milesight AIOT cameras.

Product: Milesight MS-Cxx63-PD, MS-Cxx64-xPD, MS-Cxx73-xPD
Affected versions: <= 51.7.0.77-r12, <= 3x.8.0.3-r11, <= 63.8.0.4-r3, <= 48.8.0.4-r3, <= 62.8.0.4-r5, <= 61.8.0.5-r2, <= 63.8.0.5-r3, <= CQ_63.8.0.5-r1, <= 7x.9.0.19-r5, <= PO_61.8.0.4_LPR, <= PI_61.8.0.3_LPR-r3, <= T_63.8.0.4_LPR-r3, <= T_47.8.0.4_LPR-r7, <= T_47.8.0.4_LPR-r6, <= T_61.8.0.4_LPR-r3, <= T_45.8.0.3-r9, <= 45.8.0.2-AIoT-r4, <= C_21.1.0.8-r4, <= 52.8.0.4-r5, <= 63.8.0.4-r1-NX
Fixed versions: No verified fixed-version field is available yet

Confirm exposure before applying a vendor-supported change.

1
Identify
Confirm that Milesight MS-Cxx63-PD, MS-Cxx64-xPD, MS-Cxx73-xPD and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CWE: CWE-122