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CVE mentions, exploit signals, and PoC evidence in one fast public view.

CVE detail

CVE-2026-66364

The GOOSE payload parser contains a boundary handling flaw that can be triggered by a single unauthenticated Layer 2 multicast frame on the process bus. When processing specific payload fields, an attacker controlled inner element length may exceed its enclosing length, causing the parser to over read by one byte. This out-of-bounds read reliably terminates the subscriber process, resulting in a denial-of-service condition.

CVSS 7.1 · HighBuzz score 21.0

Buzz score

Why this CVE is surfacing

Buzz score total 21.0

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 11.0 · diversity 10.0 · KEV 0.0 · OTX 0.0 · PoC 0.0
Mention score
11.0
2 evidence mentions in the snapshot
Diversity score
10.0
2 sources across 2 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
0
Maximum stars on a matched PoC repo

Why it matters now

Mention timeline

Total mentions
2
within the 30d window
Peak daily
2
highest bucket

Evidence

Source links by recency

Newest mentions first
2 source links · newest first
  • https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-211-10.jsongithub.com

    No excerpt available.

    Exploitgithub.comJul 30, 2026, 11:16 PM
  • MZ Automation GmbH libiec61850CISA Alerts

    ice condition on the device. The following versions of MZ Automation GmbH libiec61850 are affected: libiec61850 <1.6.2 (CVE-2026-66720, CVE-2026-66369, CVE-2026-63550, CVE-2026-65421, CVE-2026-66364, CVE-2026-66349, CVE-2026-56758, CVE-2026-66360) CVSS Vendor Equipment Vulnerabilities v3 7.5 MZ Automation GmbH MZ Automation GmbH libiec61850 Out-of-boun

    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

Similar CVEs

6 related CVEs with shared weakness or product evidence
  • CVE-2026-66720

    The GOOSE subscriber component improperly validates the UTC timestamp field in unauthenticated IEC 61850 GOOSE (EtherType 0x88B8) Layer-2 multicast messages. A specially crafted…

    CVSS 7.1 · High
    2 mentions
  • CVE-2026-66369

    The GOOSE parser contains an off-by-one boundary-handling flaw that can be triggered by a single unauthenticated Layer-2 multicast frame on the process bus. When specific GOOSE…

    CVSS 7.1 · High
    2 mentions
  • CVE-2026-66360

    The ISO Presentation layer contains a flaw in the handling of specific parameters during normal mode negotiation. A missing length check in the processing of the encoded present…

    CVSS 8.7 · High
    2 mentions
  • CVE-2026-66349

    The MMS server connection handler contains a flaw in its processing of BER-encoded request data. When an MMS confirmed request PDU containing an extended BER tag is received ove…

    CVSS 6.9 · Medium
    2 mentions
  • CVE-2026-65421

    The MMS BER decoder contains a flaw in decoding fixed-width BER fields (boolean/integer): an attacker-supplied length value is not validated, causing a read past the end of a he…

    CVSS 7.1 · High
    2 mentions
  • CVE-2026-63550

    The MMS BER decoder contains a boundary-handling flaw in the processing of certain fields within confirmed-request messages. When a crafted BER-encoded element is received over…

    CVSS 7.1 · High
    2 mentions