ccoap 77f55c4b466e99327c24ace8a2913d3ba7e2ccd5 contains a vulnerability in the option parsing logic that causes a segmentation fault when processing malformed COAP messages with insufficient option data.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00343.

Exploitation poc

Automatable yes

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
n/a n/a affected
Version Status Constraints
n/a affected —

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Project Subscriptions

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Advisories

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Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/ipflavors/ccoap cve-icon cve-icon
https://github.com/songxpu/bug_report/blob/master/CoAP/ccoap/VULNERABILITY_REPORT1.md cve-icon cve-icon cve-icon
History

Wed, 02 Sep 2026 08:30:00 +0000

Type Values Removed Values Added
Title Out-of-Bounds Option Parsing Resulting in Segmentation Fault in ccoap
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 02 Sep 2026 06:45:00 +0000

Type Values Removed Values Added
Title Segmentation fault in ccoap option parsing causes denial of service
Weaknesses CWE-119
CWE-20

Tue, 01 Sep 2026 22:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-787
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

Thu, 27 Aug 2026 18:00:00 +0000

Type Values Removed Values Added
Title Segmentation fault in ccoap option parsing causes denial of service
Weaknesses CWE-119
CWE-20

Thu, 27 Aug 2026 16:45:00 +0000

Type Values Removed Values Added
Description ccoap 77f55c4b466e99327c24ace8a2913d3ba7e2ccd5 contains a vulnerability in the option parsing logic that causes a segmentation fault when processing malformed COAP messages with insufficient option data.
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-09-01T19:05:07.830Z

Reserved: 2026-02-16T00:00:00.000Z

Link: CVE-2026-26459

cve-icon Vulnrichment

Updated: 2026-09-01T19:05:03.832Z

cve-icon NVD

Status : Deferred

Published: 2026-08-27T17:17:48.387

Modified: 2026-09-01T19:17:20.523

Link: CVE-2026-26459

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-02T08:15:05Z

Weaknesses