CVE-2026-13590Public exploitNetwork attack vector

Application crash via truncated Modbus header parsing

Published Jun 29, 2026 · Updated Jun 29, 2026

Heap-based buffer over-read in PcapPlusPlus allows remote attackers to crash consuming applications via truncated Modbus TCP packets. ModbusLayer::getLength reads a two-byte field without ensuring that the payload contains a complete Modbus header. Upstream release history shows Modbus support first shipped in 26.07 after the fix, conflicting with the CNA's 25.05 affected-version claim.

CVSS severity5.6
Medium
EPSS probability0.58%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer over-read in PcapPlusPlus allows remote attackers to crash consuming applications via truncated Modbus TCP packets. ModbusLayer::getLength reads a two-byte field without ensuring that the payload contains a complete Modbus header. Upstream release history shows Modbus support first shipped in 26.07 after the fix, conflicting with the CNA's 25.05 affected-version claim.

The record

CVE
CVE-2026-13590
Published
Jun 29, 2026
Updated
Jun 29, 2026
Vendor
seladb
Product
PcapPlusPlus
Classifications
CWE-122, CWE-119, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 29, 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=25.05

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

seladb · PcapPlusPlusversion=25.05

Published CVSS scores

5.6VulDB CNACVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
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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