CVE record · CVE-2026-20766

Milesight Cameras Heap-based Buffer Overflow

CVSS 8.6 HighEPSS 0.0029 · 21st percentile

Published by the CVE Program (CNA: icscert) at 27 Apr 2026, 23:45 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Milesight	MS-Cxx63-PD	affected 51.7.0.77-r12 and earlier custom Other versions: unaffected
Milesight	MS-Cxx64-xPD	affected 51.7.0.77-r12 and earlier custom Other versions: unaffected
Milesight	MS-Cxx73-xPD	affected 51.7.0.77-r12 and earlier custom Other versions: unaffected
Milesight	MS-Cxx75-xxPD	affected 51.7.0.77-r12 and earlier custom Other versions: unaffected
Milesight	MS-Cxx83-xPD	affected 51.7.0.77-r12 and earlier custom Other versions: unaffected
Milesight	MS-Cxx74-PA	affected 3x.8.0.3-r11 and earlier custom Other versions: unaffected
Milesight	MS-C8477-HPG1	affected 63.8.0.4-r3 and earlier custom Other versions: unaffected
Milesight	MS-C8477-PC	affected 48.8.0.4-r3 and earlier custom Other versions: unaffected
Milesight	MS-C5321-FPE	affected 62.8.0.4-r5 and earlier custom Other versions: unaffected
Milesight	MS-Cxx72-xxxPE	affected 61.8.0.5-r2 and earlier custom Other versions: unaffected
Milesight	MS-Cxx62-xxxPE	affected 61.8.0.5-r2 and earlier custom Other versions: unaffected
Milesight	MS-Cxx52-xxxPE	affected 61.8.0.5-r2 and earlier custom Other versions: unaffected
Milesight	MS-Cxx66-xxxPE	affected 61.8.0.5-r2 and earlier custom Other versions: unaffected
Milesight	MS-Cxx66-xxxGPE	affected 61.8.0.5-r2 and earlier custom Other versions: unaffected
Milesight	MS-Cxx61-xxxPE	affected 61.8.0.5-r2 and earlier custom Other versions: unaffected
Milesight	MS-Cxx67-xxxPE	affected 61.8.0.5-r2 and earlier custom Other versions: unaffected
Milesight	MS-Cxx71-xxxPE	affected 61.8.0.5-r2 and earlier custom Other versions: unaffected
Milesight	MS-Cxx41-xxxPE	affected 61.8.0.5-r2 and earlier custom Other versions: unaffected
Milesight	MS-Cxx76-PE	affected 61.8.0.5-r2 and earlier custom Other versions: unaffected
Milesight	MS-Cxx65-PE	affected 61.8.0.5-r2 and earlier custom Other versions: unaffected
Milesight	MS-Cxx66-xxxG1	affected 63.8.0.5-r3 and earlier custom Other versions: unaffected
Milesight	MS-Cxx62-xxxG1	affected 63.8.0.5-r3 and earlier custom Other versions: unaffected
Milesight	MS-Cxx72-xxxG1	affected 63.8.0.5-r3 and earlier custom Other versions: unaffected
Milesight	MS-CQxx31-xxxG1	affected CQ_63.8.0.5-r1 and earlier custom Other versions: unaffected
Milesight	MS-CQxx68-xxxG1	affected CQ_63.8.0.5-r1 and earlier custom Other versions: unaffected
Milesight	MS-CQxx72-xxxG1	affected CQ_63.8.0.5-r1 and earlier custom Other versions: unaffected
Milesight	MS-Nxxxx-NxE	affected 7x.9.0.19-r5 and earlier custom Other versions: unaffected
Milesight	MS-Nxxxx-xxC	affected 7x.9.0.19-r5 and earlier custom Other versions: unaffected
Milesight	MS-Nxxxx-xxE	affected 7x.9.0.19-r5 and earlier custom Other versions: unaffected
Milesight	MS-Nxxxx-xxG	affected 7x.9.0.19-r5 and earlier custom Other versions: unaffected
Milesight	MS-Nxxxx-xxH	affected 7x.9.0.19-r5 and earlier custom Other versions: unaffected
Milesight	MS-Nxxxx-xxT	affected 7x.9.0.19-r5 and earlier custom Other versions: unaffected
Milesight	PMC8266-FPE	affected PO_61.8.0.4_LPR and earlier custom Other versions: unaffected
Milesight	PMC8266-FGPE	affected PO_61.8.0.4_LPR and earlier custom Other versions: unaffected
Milesight	PM3322-E	affected PI_61.8.0.3_LPR-r3 and earlier custom Other versions: unaffected
Milesight	TS4466-X4RIPG1	affected T_63.8.0.4_LPR-r3 and earlier custom Other versions: unaffected
Milesight	TS5366-X12RIPG1	affected T_63.8.0.4_LPR-r3 and earlier custom Other versions: unaffected
Milesight	TS8266-X4RIPG1	affected T_63.8.0.4_LPR-r3 and earlier custom Other versions: unaffected
Milesight	TS4466-X4RIVPG1	affected T_63.8.0.4_LPR-r3 and earlier custom Other versions: unaffected
Milesight	TS4466-RFIVPG1	affected T_63.8.0.4_LPR-r3 and earlier custom Other versions: unaffected

And 42 more products. The full list is on the CVE record.

Identifiers: CVE-2026-20766
CNA: icscert
Weakness (CWE): CWE-122
Tags: Milesight MS-Cxx63-PD
Milesight MS-Cxx64-xPD
Milesight MS-Cxx73-xPD
Milesight MS-Cxx75-xxPD
Milesight MS-Cxx83-xPD
Milesight MS-Cxx74-PA
Milesight MS-C8477-HPG1
Milesight MS-C8477-PC
Memory corruption
Published: 27 Apr 2026
Updated: 28 Apr 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
8.6	High	4.0	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	CNA (icscert)Used for this record
8.8	High	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H	CNA (icscert)

CISA KEV Not listed.
EPSS 0.0029, the 21st percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 27 Apr 2026. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.