CVE-2026-62351Public exploitNetwork attack vector

Unauthenticated server crash via compressed RPC packet

Published Jul 15, 2026 · Updated Jul 15, 2026

Out-of-bounds read in TDengine before 3.4.1.15 allows remote attackers to crash the database server via a compressed RPC packet. The transport-layer transDecompressMsg function reads STransCompMsg.contLen before confirming that the packet includes the eight-byte compression structure, then uses the value for allocation and LZ4 decompression. Any network-reachable attacker can trigger the pre-authentication path on TCP port 6030, repeatedly terminating taosd and interrupting all database operations.

CVSS severity7.5
High
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in TDengine before 3.4.1.15 allows remote attackers to crash the database server via a compressed RPC packet. The transport-layer transDecompressMsg function reads STransCompMsg.contLen before confirming that the packet includes the eight-byte compression structure, then uses the value for allocation and LZ4 decompression. Any network-reachable attacker can trigger the pre-authentication path on TCP port 6030, repeatedly terminating taosd and interrupting all database operations.

The record

CVE
CVE-2026-62351
Published
Jul 15, 2026
Updated
Jul 15, 2026
Vendor
TAOS Data
Product
TDengine
Classifications
CWE-125, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 15, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 3.4.1.15

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

TAOS Data · TDengineversion=< 3.4.1.15

Published CVSS scores

7.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1499.004Application or System Exploitation

Public exploit references

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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