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PatchSiren cyber security CVE debrief

CVE-2026-36501 OpenDaylight CVE debrief

CVE-2026-36501 is a HIGH severity vulnerability in Controller v12.0.5. An issue in the Externalizable.readExternal() component allows attackers to cause a Denial of Service (DoS) via a crafted input. The vulnerability has a CVSS score of 7.5 and was published on [cvePublishedAt](https://www.cve.org/CVERecord?id=CVE-2026-36501).

Vendor
OpenDaylight
Product
Controller
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-05
Original CVE updated
2026-06-09
Advisory published
2026-06-05
Advisory updated
2026-06-09

Who should care

Users of Controller v12.0.5 should be aware of this vulnerability and take necessary actions to mitigate it.

Technical summary

The vulnerability is caused by an issue in the Externalizable.readExternal() component of Controller v12.0.5. This allows attackers to cause a Denial of Service (DoS) via a crafted input.

Defensive priority

HIGH

Recommended defensive actions

  • Apply patches or updates provided by the vendor to fix the vulnerability.
  • Restrict access to the affected component to prevent exploitation.

Evidence notes

The vendor of this product is currently listed as Unknown Vendor. Evidence suggests the product may be related to Opendaylight.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-36501 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-36501

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-36501 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-36501

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.