CVE-2026-63035 (GCVE-0-2026-63035)
Vulnerability from cvelistv5 – Published: 2026-07-30 21:56 – Updated: 2026-07-31 15:45
VLAI
EPSS
VEX
Title
o6 Automation open62541 Use After Free
Summary
A heap use-after-free vulnerability in the TransferSubscriptions service
in open62541 may allow an authenticated attacker to cause a denial of
service or potentially execute arbitrary code.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-31 15:44 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
7 references
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| o6 Automation | open62541 |
Affected:
1.3.0 , ≤ 1.3.17
(custom)
Affected: 1.4.0 , ≤ 1.4.16 (custom) Affected: 1.5.0 , ≤ 1.5.4 (custom) Affected: master |
guessed |
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"value": "\u003cp\u003eo6 Automation has prepared mitigations and fixes to address these \nissues and recommends that users update to the newest version. The new \nversion can be obtained by contacting o6 Automation\u0026nbsp;\u0026nbsp;\u003ca href=\"https://www.o6-automation.com/contact\"\u003ehttps://www.o6-automation.com/contact\u003c/a\u003e\nor by downloading from the \nfollowing locations:\u003cbr\u003e\u003ca href=\"https://github.com/open62541/open62541/pull/8235/commits/b666d35769ce63998442e4d0810a3fb10b50179f\"\u003ehttps://github.com/open62541/open62541/pull/8235/commits/b666d35769ce63998442e4d0810a3fb10b50179f\u003c/a\u003e\u003cbr\u003e\u003ca href=\"https://github.com/open62541/open62541/pull/8236/commits/06b99fef667c8ec5bdf0605b4f00c84fcc1d3a60\"\u003ehttps://github.com/open62541/open62541/pull/8236/commits/06b99fef667c8ec5bdf0605b4f00c84fcc1d3a60\u003c/a\u003e\u003cbr\u003e\u003ca href=\"https://github.com/open62541/open62541/pull/8237/commits/1b71d9c5d9c4d02d4729b8903a52e9f530bf804e\"\u003ehttps://github.com/open62541/open62541/pull/8237/commits/1b71d9c5d9c4d02d4729b8903a52e9f530bf804e\u003c/a\u003e\u003cbr\u003e\u003ca href=\"https://github.com/open62541/open62541/pull/8238/commits/afab4107bfd161da9ce8bb30ed77f3968c9c97df\"\u003ehttps://github.com/open62541/open62541/pull/8238/commits/afab4107bfd161da9ce8bb30ed77f3968c9c97df\u003c/a\u003e\u003c/p\u003e\n\u003cp\u003eFor more information, see open62541 \nSecurity Advisories SA-2026-0012, SA-2026-0014, and SA-2026-0015 or \ncontact o6 Automation:\u0026nbsp;\u003ca href=\"https://www.o6-automation.com/contact\"\u003ehttps://www.o6-automation.com/contact\u003c/a\u003e\u003c/p\u003e"
}
],
"value": "o6 Automation has prepared mitigations and fixes to address these \nissues and recommends that users update to the newest version. The new \nversion can be obtained by contacting o6 Automation\u00a0\u00a0 https://www.o6-automation.com/contact \nor by downloading from the \nfollowing locations:\n https://github.com/open62541/open62541/pull/8235/commits/b666d35769ce63998442e4d0810a3fb10b50179f \n https://github.com/open62541/open62541/pull/8236/commits/06b99fef667c8ec5bdf0605b4f00c84fcc1d3a60 \n https://github.com/open62541/open62541/pull/8237/commits/1b71d9c5d9c4d02d4729b8903a52e9f530bf804e \n https://github.com/open62541/open62541/pull/8238/commits/afab4107bfd161da9ce8bb30ed77f3968c9c97df \n\n\n\n\nFor more information, see open62541 \nSecurity Advisories SA-2026-0012, SA-2026-0014, and SA-2026-0015 or \ncontact o6 Automation:\u00a0 https://www.o6-automation.com/contact"
}
],
"source": {
"advisory": "ICSA-26-211-08",
"discovery": "EXTERNAL"
},
"title": "o6 Automation open62541 Use After Free",
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"cveMetadata": {
"assignerOrgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6",
"assignerShortName": "icscert",
"cveId": "CVE-2026-63035",
"datePublished": "2026-07-30T21:56:04.345Z",
"dateReserved": "2026-07-27T15:02:47.801Z",
"dateUpdated": "2026-07-31T15:45:48.062Z",
"state": "PUBLISHED"
},
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}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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