Evidence used
- No CISA KEV confirmation is currently recorded.
- EPSS is 0.17% for the current model date.
BlackTreeCVE IntelligenceFull vulnerability report · 2026
CVE-2026-29988High confidence
Milesight AM102/102L V2: Cleartext Transmission of Sensitive Information
Milesight · AM102/102L V2
8.3HighCVSS 4.0
Within 7 days
Fix not verifiedHigh technical severity; prioritise exposed affected systems while verifying vendor guidance.
R
Open reassessment dashboard →Operational reassessment
Published severity in operational context
Published severityHigh→Operational priority:High, unchanged from published severity.unchanged
Compensating controls
- Restrict local access and enforce least privilege on affected hosts.
- Monitor vendor guidance and exploitation sources for a material change.
Verification
- Confirm that the asset runs Milesight AM102/102L V2 and falls inside the recorded affected range.
- Recheck the vendor advisory before scheduling a change because no verified fixed version is currently retained.
- Validate exposure, authentication requirements and compensating controls in the actual environment.
- Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
High technical severity; prioritise exposed affected systems while verifying vendor guidance.
Fix not verified01
What, why and how
A cleartext transmission of sensitive information vulnerability in the NFC interface of multiple Milesight IoT device models running affected firmware versions allows an unauthenticated attacker with physical proximity to retrieve LoRaWAN ABP NwkSKey and AppSKey values and D2D keys via an NFC read operation. The exposed keys can be used to decrypt LoRaWAN traffic, forge uplink and downlink frames, submit falsified sensor data, issue supported device commands, and cause subsequent legitimate frames to be rejected.
What
A cleartext transmission of sensitive information vulnerability in the NFC interface of multiple Milesight IoT device models running affected firmware versions allows an unauthenticated attacker with physical proximity to retrieve LoRaWAN ABP NwkSKey and AppSKey values and D2D keys via an NFC read operation. The exposed keys can be used to decrypt LoRaWAN traffic, forge uplink and downlink frames, submit falsified sensor data, issue supported device commands, and cause subsequent legitimate frames to be rejected.
Why
The product transmits sensitive or security-critical data in cleartext in a communication channel that can be sniffed by unauthorized actors.
How
An attacker operating through physical access may attempt exploitation without authentication or user interaction. If successful, the issue may obtain information outside the intended access boundary.
What
A cleartext transmission of sensitive information vulnerability in the NFC interface of multiple Milesight IoT device models running affected firmware versions allows an unauthenticated attacker with physical proximity to retrieve LoRaWAN ABP NwkSKey and AppSKey values and D2D keys via an NFC read operation. The exposed keys can be used to decrypt LoRaWAN traffic, forge uplink and downlink frames, submit falsified sensor data, issue supported device commands, and cause subsequent legitimate frames to be rejected.
Why
The product transmits sensitive or security-critical data in cleartext in a communication channel that can be sniffed by unauthorized actors.
How
An attacker operating through physical access may attempt exploitation without authentication or user interaction. If successful, the issue may obtain information outside the intended access boundary.
02
Exploit reality and attack path
CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.
Observed exploitation No confirmed evidence
?
Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.
Public PoC / exploit material None recorded
?
Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.
- Likely attack path
- physical access → Cleartext Transmission of Sensitive Information → obtain information outside the intended access boundary
- Attack surface
- Physical
- Privileges required
- None: unauthenticated exploitation is possible
- User interaction
- None
- Attack complexity
- Low: no specialised conditions are recorded
- Security boundary
- Not a CVSS 4.0 base metric
- Weakness
?
CWE means Common Weakness Enumeration: a standard category for the underlying weakness. - CWE-319 ↗
CWE-319: Cleartext Transmission of Sensitive Information. The product transmits sensitive or security-critical data in cleartext in a communication channel that can be sniffed by unauthorized actors.
- CVSS vector
?
CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity. CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:H/SA:NCommon Vulnerability Scoring System 4.0: the compact vector below is decoded into plain language.
AVPhysicalAttack vector: The attacker needs physical access to the vulnerable system.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.ATNoneAttack requirements: No additional deployment or execution condition is required.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.VCHighVulnerable-system confidentiality: A successful attack can cause a major loss.VIHighVulnerable-system integrity: A successful attack can cause a major loss.VAHighVulnerable-system availability: A successful attack can cause a major loss.SCNoneSubsequent-system confidentiality: No direct loss is represented by this metric.SIHighSubsequent-system integrity: A successful attack can cause a major loss.SANoneSubsequent-system availability: No direct loss is represented by this metric.- Post-exploitation / living off the land
- No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
03
Patch and workaround
Operational remediation based on structured source evidence.
- Status
?
Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change. - Fix not verified
- Affected
- AM102/102L V2: ≤ 1.4
- AM103/103L V2: ≤ 1.8
- AM304L: ≤ 1.2
- AM305L: ≤ 1.2
- AM307 V2: ≤ 1.4
- AM308: ≤ 1.7
- AM308L: ≤ 1.7
- AM319: ≤ 1.6
- WS101: ≤ 1.5
- WS136: ≤ 1.6
- WS156: ≤ 1.6
- WS201: ≤ 1.2
- WS202: ≤ 1.8
- WS203: ≤ 1.3
- WS301: ≤ 1.15
- WS303: ≤ 1.5
- WS50X (2W-W11-EU) [501/502/503]: ≤ 1.3
- WS50X (3W-W11-EU) [501/502/503]: ≤ 1.2
- WS50X (3W-W12-EU) [501/502/503]: ≤ 1.2
- WS51X [513/515]: ≤ 1.9
- WS52X [523/525]: ≤ 1.12
- WS558: ≤ 1.1
- VS321: ≤ 321.1.0.1-r5
- VS360: ≤ 1.2-r1
- VS350 V3: ≤ 1.1
- VS351: ≤ 1.5
- VS330: ≤ 1.3
- VS340: ≤ 1.1
- VS341: ≤ 1.1
- VS370: ≤ 1.1
- GS301: ≤ 1.2
- EM300-TH V3: ≤ 1.10
- EM320-TH: ≤ 1.6
- TS201 V2: ≤ 1.1
- TS30x V2: ≤ 1.1
- WT201 V2: ≤ 1.5
- WT211 V2: ≤ 1.5
- UC501: ≤ 1.6
- UC502: ≤ 1.6
- UC511 V4: ≤ 1.6
- UC512 V4: ≤ 1.6
- UC521 LoRaWAN®: ≤ 1.2
- UC521 Cellular: ≤ 1.3
- EM300-DI: ≤ 1.3
- EM300-MCS V3: ≤ 1.10
- EM300-MLD V3: ≤ 1.10
- EM300-SLD V3: ≤ 1.10
- EM300-ZLD V3: ≤ 1.10
- EM320-TILT: ≤ 1.3
- EM400-TLD LoRaWAN®: ≤ 1.2
- EM400-TLD NB-IoT: ≤ 1.5
- EM400-MUD LoRaWAN®: ≤ 1.2
- EM400-MUD NB-IoT: ≤ 1.6
- EM400-UDL LoRaWAN®: ≤ 1.2
- EM410-RDL Cellular: ≤ 1.1
- EM411-RDL: ≤ 1.2
- EM500-CO2 V2: ≤ 1.11
- EM500-SWL: ≤ 1.11
- EM500-LGT: ≤ 1.11
- EM500-PT100 V2: ≤ 1.11
- EM500-PP: ≤ 1.11
- EM500-SMTC: ≤ 1.11
- EM500-UDL: ≤ 1.11
- AT101: ≤ 1.2
- Fixed
- No fixed version is explicitly recorded in the structured CVE data.
- Action
- No verified patch reference is present in the current structured sources. Check the vendor advisory before making a change.
- Workaround
- No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04
Evidence and provenance
Published 26 Aug 2026 · Last source change 26 Aug 2026, 15:29 UTC · CWE-319 · Cleartext Transmission of Sensitive Information
CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source FIRST · tracked since 2026-08-26
?
The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.European sourceENISA EUVD · EUVD-2026-66229
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceCNA
NVD statusNVD not scheduled
Core structured fields are present and their contributing authorities are shown above.
Material change intelligence
View recent updates ↗What changed after publication
- ENISA EUVD mappingEUVD-2026-66229 was added to the official ENISA EUVD mapping for this CVE.ENISA EUVD ↗
- Before
- not recorded
- After
- {"euvdId":"EUVD-2026-66229"}
- Vendor guidanceAuthoritative vendor guidance changed: removed mitigation: milesight.com/vulnerabilities-in-some-milesight-sensors; removed remediation: milesight.com/vulnerabilities-in-some-milesight-sensors.CNA ↗
- Before
- mitigation: milesight.com/vulnerabilities-in-some-milesight-sensors · remediation: milesight.com/vulnerabilities-in-some-milesight-sensors
- After
- no authoritative guidance recorded
- Remediation statusRemediation status changed from Mitigation available to Awaiting fix.CNA ↗
- Before
- Mitigation available
- After
- Awaiting fix
- Catalogue recordCVE added to the BlackTree catalogue.CNA ↗
Technical terms and abbreviations used in this report
- CVE
- Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
- CVSS
- Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
- EPSS
- Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
- CWE
- Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
- CNA
- CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
- CISA ADP
- Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
- NVD
- National Vulnerability Database: NIST's enrichment service for CVE records.
- CERT / CSIRT
- A computer security incident response team that publishes warnings or coordinates incident response.
- PoC
- Proof of concept: public material that demonstrates or helps reproduce exploitation.
- CSAF
- Common Security Advisory Framework: a machine-readable format for security advisories.
- LoTL
- Living off the land: abuse of legitimate tools or system functions during an attack.