Trending
CVE-2026-63362

CVE detail

CVE-2026-63362

An unsigned integer underflow in the PubSub signature verification path in open62541 may allow a remote attacker to cause a denial of service via a crafted UDP packet.

CVSS 8.2 · HighBuzz score 35.8

Buzz score

Why this CVE is surfacing

Buzz score total 35.8

This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.

Buzz score components · mention 20.8 · diversity 15.0 · KEV 0.0 · OTX 0.0 · PoC 0.0

Mention score

20.8

7 evidence mentions in the snapshot

Diversity score

15.0

3 sources across 3 categories

KEV score

0.0

No KEV entry observed

OTX score

0.0

0 OTX pulses

PoC score

0.0

0 repos · best confidence N/A

Best PoC traction

Maximum stars on a matched PoC repo

Why it matters now

Mention timeline

Total mentions: 7; within the 30d window
Peak daily: 7; highest bucket

Evidence

Source links by recency

Newest mentions first

7 source links · newest first

https://www.o6-automation.com/contactwww.o6-automation.com
No excerpt available.
referencewww.o6-automation.comJul 30, 2026, 11:16 PM
https://github.com/open62541/open62541/pull/8238/commits/afab4107bfd161da9ce8bb30ed77f3968c9c97dfgithub.com
No excerpt available.
Exploitgithub.comJul 30, 2026, 11:16 PM
https://github.com/open62541/open62541/pull/8237/commits/1b71d9c5d9c4d02d4729b8903a52e9f530bf804egithub.com
No excerpt available.
Exploitgithub.comJul 30, 2026, 11:16 PM
https://github.com/open62541/open62541/pull/8236/commits/06b99fef667c8ec5bdf0605b4f00c84fcc1d3a60github.com
No excerpt available.
Exploitgithub.comJul 30, 2026, 11:16 PM
https://github.com/open62541/open62541/pull/8235/commits/b666d35769ce63998442e4d0810a3fb10b50179fgithub.com
No excerpt available.
Exploitgithub.comJul 30, 2026, 11:16 PM
https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-211-08.jsongithub.com
No excerpt available.
Exploitgithub.comJul 30, 2026, 11:16 PM
o6 Automation open62541CISA Alerts
View CSAF Summary Successful exploitation of these vulnerabilities could allow an attacker to disclose sensitive information, cause a denial of service, or potentially execute arbitrary code. The following versions of o6 Automation open62541 are affected: open62541 on Windows and Linux >=from_1.3.0| =from_1.4.0| =from_1.5.0| =from_1.3.0| =from_1.4.0| =from_1.5.0| =from_1.3.0| =from_1.4.0| =from_1.5.0| =from_1.3.0| =from_1.4.0| =from_1.5.0| =from_1.3.0| =from_1.4.0| =from_1.5.0|<=1.5.4, o6 Automa
governmentwww.cisa.govJul 30, 2026, 12:00 PM

Exploit code

Public exploit repository references

Public PoC repositories are third-party, potentially unsafe artifacts. Treat their code as untrusted and use it only on authorized systems in an isolated, least-privilege environment. cvebuzz does not execute the code or verify that an exploit works.

0 repository references · best confidence N/A · max 0 stars

No public PoC repositories have been matched yet.

Related records

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External lookup

Potential internet exposure

Potential exposure only — not proof of vulnerability.Shodan results indicate potentially internet-exposed products, not confirmed vulnerable systems. They do not confirm that any returned system is vulnerable to CVE-2026-63362.

Product-level CPE searches intentionally omit version fields and NVD version-range or configuration certainty. Verify the exact product version and configuration independently.

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Product CPE queries

Derived from this CVE's existing NVD CPE 2.3 records; the application, operating-system, or hardware part is retained.

Product query unavailableNo valid raw CPE 2.3 product record is available for this CVE, so no product-level Shodan query is shown.

Exact CVE query

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Metadata

Canonical fields

NVD status

Received

Published

Jul 30, 2026

Modified

Jul 30, 2026

Official record

Authoritative NVD record

CVSS vector

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CWE IDs

Vendor classifications

Unavailable

How this vector reads

CVSS 4.0 base metrics decoded below. This explanation does not recalculate or change the NVD score.

Attack Vector (AV): Network. The vulnerable system can be reached across network boundaries.
Attack Complexity (AC): High. Successful exploitation depends on conditions outside the attacker's control.
Attack Requirements (AT): None. No prerequisite deployment or execution condition is required.
Privileges Required (PR): None. The attacker needs no privileges on the vulnerable system.
User Interaction (UI): None. Exploitation does not require a targeted user to act.
Vulnerable System Confidentiality (VC): None. There is no direct impact to this security property.
Vulnerable System Integrity (VI): None. There is no direct impact to this security property.
Vulnerable System Availability (VA): High. There is a total or serious impact to this security property.
Subsequent System Confidentiality (SC): None. There is no direct impact to this security property.
Subsequent System Integrity (SI): None. There is no direct impact to this security property.
Subsequent System Availability (SA): None. There is no direct impact to this security property.

Optional CVSS v4 metrics remain in the raw vector; only base metrics are expanded here.

Signals

Exploitation indicators

0 stored signals · no KEV · 0 OTX pulses