CVE-2025-70340Network attack vector

Privilege escalation via forged system alarm comments

Published Aug 26, 2026 · Updated Aug 26, 2026

Broken access control in ThingsBoard PE 4.21 and earlier allows remote authenticated users to forge system alarm comments via API requests. The alarm-comment endpoint trusted a caller-supplied comment type and permitted updates to existing system-generated comments instead of reserving both operations for the platform. Customer-user access is sufficient to impersonate internal alarm actions or alter trusted comment history; the flaw does not grant unauthenticated access.

CVSS severity6.5
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Broken access control in ThingsBoard PE 4.21 and earlier allows remote authenticated users to forge system alarm comments via API requests. The alarm-comment endpoint trusted a caller-supplied comment type and permitted updates to existing system-generated comments instead of reserving both operations for the platform. Customer-user access is sufficient to impersonate internal alarm actions or alter trusted comment history; the flaw does not grant unauthenticated access.

The record

CVE
CVE-2025-70340
Published
Aug 26, 2026
Updated
Aug 26, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1565
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.8TenableAV:N/AC:L/Au:S/C:N/I:C/A:N
6.5TenableCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1565Data Manipulation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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