CVE-2026-13587Public exploitNetwork attack vector

Application crash via unvalidated packet capture length

Published Jun 29, 2026 · Updated Jun 29, 2026

Heap-based buffer overflow in PcapPlusPlus 25.05 allows remote attackers to crash applications that parse a crafted PCAPNG file. In LightPcapNg's parse_by_block_type(), memcpy() trusts captured_packet_length from an Enhanced Packet Block and reads past its heap allocation. An application must accept and parse an attacker-supplied PCAPNG file; the demonstrated result is an out-of-bounds read and process abort, while information disclosure is not demonstrated.

CVSS severity3.7
Low
EPSS probability0.66%
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 overflow in PcapPlusPlus 25.05 allows remote attackers to crash applications that parse a crafted PCAPNG file. In LightPcapNg's parse_by_block_type(), memcpy() trusts captured_packet_length from an Enhanced Packet Block and reads past its heap allocation. An application must accept and parse an attacker-supplied PCAPNG file; the demonstrated result is an out-of-bounds read and process abort, while information disclosure is not demonstrated.

The record

CVE
CVE-2026-13587
Published
Jun 29, 2026
Updated
Jun 29, 2026
Vendor
seladb
Product
PcapPlusPlus
Classifications
CWE-122, CWE-119, T1499
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

2.6VulDBAV:N/AC:H/Au:N/C:N/I:N/A:P
2.9VulDBCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
3.7VulDBCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
T1499Endpoint Denial of Service

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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