Milesight MS-Cxx72-FIPKG1 heap-based overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.6$5k-$25k0.00

Summaryinfo

A vulnerability described as critical has been identified in Milesight MS-Cxx63-PD, MS-Cxx64-xPD, MS-Cxx73-xPD, MS-Cxx75-xxPD, MS-Cxx83-xPD, MS-Cxx74-PA, MS-C8477-HPG1, MS-C8477-PC, MS-C5321-FPE, MS-Cxx72-xxxPE, MS-Cxx62-xxxPE, MS-Cxx52-xxxPE, MS-Cxx66-xxxPE, MS-Cxx66-xxxGPE, MS-Cxx61-xxxPE, MS-Cxx67-xxxPE, MS-Cxx71-xxxPE, MS-Cxx41-xxxPE, MS-Cxx76-PE, MS-Cxx65-PE, MS-Cxx66-xxxG1, MS-Cxx62-xxxG1, MS-Cxx72-xxxG1, MS-CQxx31-xxxG1, MS-CQxx68-xxxG1, MS-CQxx72-xxxG1, MS-Nxxxx-NxE, MS-Nxxxx-xxC, MS-Nxxxx-xxE, MS-Nxxxx-xxG, MS-Nxxxx-xxH, MS-Nxxxx-xxT, PMC8266-FPE, PMC8266-FGPE, PM3322-E, TS4466-X4RIPG1, TS5366-X12RIPG1, TS8266-X4RIPG1, TS4466-X4RIVPG1, TS4466-RFIVPG1, TS8266-X4RIVPG1, TS8266-RFIVPG1, TS4466-X4RIWG1, TS8266-X4RIWG1, TS5510-GVH, TS5510-GH, TS5511-GVH, TS2966-X12TPE, TS4466-X4RPE, TS5366-X12PE, TS8266-X4PE, TS2966-X12TVPE, TS4466-X4RVPE, TS5366-X12VPE, TS8266-X4VPE, TS4441-X36RPE, TS4441-X36RE, TS4466-X4RWE, TS8266-X4WE, MS-C2964-RFLPC, MS-C2972-RFLPC, MS-C2966-RFLWPC, TS2866-X4TPC, TS2866-X4TVPC, TS2866-X4TGPC, TS2841-X36TPC, W, TS2867-X5TPC, TS2961-X12TPC, TS8266-FPC, P, MS-C2966-X12RLPC, MS-C2966-X12RLVPC, MS-C5366-X12LPC, MS-C5366-X12LVPC, MS-C5361-X12LPC, MS-Cxx66-xxxxGOPC, SC211, SP111, MS-Cxx66-RFIPKG1, MS-Cxx72-RFIPKG1, MS-Cxx66-FIPKG1 and MS-Cxx72-FIPKG1. The affected element is an unknown function. Such manipulation leads to heap-based overflow. This vulnerability is uniquely identified as CVE-2026-20766. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability was found in Milesight MS-Cxx63-PD, MS-Cxx64-xPD, MS-Cxx73-xPD, MS-Cxx75-xxPD, MS-Cxx83-xPD, MS-Cxx74-PA, MS-C8477-HPG1, MS-C8477-PC, MS-C5321-FPE, MS-Cxx72-xxxPE, MS-Cxx62-xxxPE, MS-Cxx52-xxxPE, MS-Cxx66-xxxPE, MS-Cxx66-xxxGPE, MS-Cxx61-xxxPE, MS-Cxx67-xxxPE, MS-Cxx71-xxxPE, MS-Cxx41-xxxPE, MS-Cxx76-PE, MS-Cxx65-PE, MS-Cxx66-xxxG1, MS-Cxx62-xxxG1, MS-Cxx72-xxxG1, MS-CQxx31-xxxG1, MS-CQxx68-xxxG1, MS-CQxx72-xxxG1, MS-Nxxxx-NxE, MS-Nxxxx-xxC, MS-Nxxxx-xxE, MS-Nxxxx-xxG, MS-Nxxxx-xxH, MS-Nxxxx-xxT, PMC8266-FPE, PMC8266-FGPE, PM3322-E, TS4466-X4RIPG1, TS5366-X12RIPG1, TS8266-X4RIPG1, TS4466-X4RIVPG1, TS4466-RFIVPG1, TS8266-X4RIVPG1, TS8266-RFIVPG1, TS4466-X4RIWG1, TS8266-X4RIWG1, TS5510-GVH, TS5510-GH, TS5511-GVH, TS2966-X12TPE, TS4466-X4RPE, TS5366-X12PE, TS8266-X4PE, TS2966-X12TVPE, TS4466-X4RVPE, TS5366-X12VPE, TS8266-X4VPE, TS4441-X36RPE, TS4441-X36RE, TS4466-X4RWE, TS8266-X4WE, MS-C2964-RFLPC, MS-C2972-RFLPC, MS-C2966-RFLWPC, TS2866-X4TPC, TS2866-X4TVPC, TS2866-X4TGPC, TS2841-X36TPC, W, TS2867-X5TPC, TS2961-X12TPC, TS8266-FPC, P, MS-C2966-X12RLPC, MS-C2966-X12RLVPC, MS-C5366-X12LPC, MS-C5366-X12LVPC, MS-C5361-X12LPC, MS-Cxx66-xxxxGOPC, SC211, SP111, MS-Cxx66-RFIPKG1, MS-Cxx72-RFIPKG1, MS-Cxx66-FIPKG1 and MS-Cxx72-FIPKG1. It has been rated as critical. Affected by this issue is an unknown code block. The manipulation with an unknown input leads to a heap-based overflow vulnerability. Using CWE to declare the problem leads to CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). Impacted is confidentiality, integrity, and availability. CVE summarizes:

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

The weakness was disclosed by Souvik Kandar as icsa-26-113-03. The advisory is available at cisa.gov. This vulnerability is handled as CVE-2026-20766 since 03/12/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 07/21/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 8.8
VulDB Meta Temp Score: 8.6

VulDB Base Score: 8.8
VulDB Temp Score: 8.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 8.8
CNA Vector (icscert): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Heap-based overflow
CWE: CWE-122 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
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Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

03/12/2026 CVE reserved
04/28/2026 +46 days Advisory disclosed
04/28/2026 +0 days VulDB entry created
07/21/2026 +84 days VulDB entry last update

Sourcesinfo

Advisory: icsa-26-113-03
Researcher: Souvik Kandar
Status: Not defined

CVE: CVE-2026-20766 (🔒)
GCVE (CVE): GCVE-0-2026-20766
GCVE (VulDB): GCVE-100-359882

Entryinfo

Created: 04/28/2026 06:30
Updated: 07/21/2026 05:16
Changes: 04/28/2026 06:30 (74), 07/21/2026 05:16 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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