Priority HIGH 82
OpENer 2.3.0 (master branch up to commit 76b95cf) is vulnerable to a severe memory corruption issue caused by an integer underflow in the processing of connected explicit messages (SendUnitData).
CVSS 3.1CRITICAL 9.8· Network · No auth · No interaction · EPSS 0.00566 · Published 2026-07-13 · No fix listed CWE-191
Priority HIGH 82
An out-of-bounds write vulnerability exists in the SetAttributeList attribute_count_request functionality of EIP Stack Group OpENer development commit 58ee13c.
CVSS 3.1CRITICAL 10.0· Network · No auth · No interaction · EPSS 0.14372 · Published 2023-03-16 · No fix listed CWE-787
Priority HIGH 82
An out-of-bounds write vulnerability exists in the GetAttributeList attribute_count_request functionality of EIP Stack Group OpENer development commit 58ee13c.
CVSS 3.1CRITICAL 10.0· Network · No auth · No interaction · EPSS 0.14372 · Published 2023-03-16 · No fix listed CWE-787
Priority HIGH 80
OpENer 2.3.0 (commit 76b95cf) has an out-of-bounds read issue in CIP message parsing when handling malformed explicit requests with a forged EPath size.
CVSS 3.1CRITICAL 9.1· Network · No auth · No interaction · EPSS 0.00551 · Published 2026-07-13 · No fix listed CWE-125
Priority HIGH 80
EIPStackGroup OpENer 2.3.0 (commit 76b95cf) suffers from an Incorrect Access Control vulnerability in its handling of encapsulation sessions.
CVSS 3.1CRITICAL 9.1· Network · No auth · No interaction · EPSS 0.00522 · Published 2026-07-13 · No fix listed CWE-284
Priority HIGH 80
EIPStackGroup OpENer 2.3.0 (commit 76b95cf) has an out-of-bounds read issue in Connection Manager handling of ForwardOpen requests when processing short malformed packets.
CVSS 3.1CRITICAL 9.1· Network · No auth · No interaction · EPSS 0.00649 · Published 2026-07-13 · No fix listed CWE-125
Priority HIGH 80
In OpENer 2.3.0 (commit 76b95cf) when parsing incoming CIP (Common Industrial Protocol) network packets, the length parameter is inconsistently typed across the call stack.
CVSS 3.1CRITICAL 9.1· Network · No auth · No interaction · EPSS 0.00628 · Published 2026-07-13 · No fix listed CWE-190
Priority HIGH 72
A use-of-uninitialized-pointer vulnerability exists in the Forward Open connection_management_entry functionality of EIP Stack Group OpENer development commit 58ee13c.
CVSS 3.1HIGH 7.5· Network · No auth · No interaction · EPSS 0.08047 · Published 2023-03-16 · No fix listed CWE-824
Priority MEDIUM 57
A security vulnerability has been detected in EIPStackGroup OpENer up to 2.3.0.
CVSS 4.0MEDIUM 5.3· Network · Low privileges · No interaction · EPSS 0.00243 · Published 2026-06-03 · No fix listed CWE-119
Priority MEDIUM 50
An out-of-bounds write vulnerability exists in the Ethernet/IP server functionality of EIP Stack Group OpENer 2.3 and development commit 8c73bf3.
CVSS 3.1CRITICAL 9.8· Network · No auth · No interaction · EPSS 0.04714 · Published 2020-12-11 · No fix listed CWE-787
Priority MEDIUM 46
An information disclosure vulnerability exists in the Ethernet/IP UDP handler functionality of EIP Stack Group OpENer 2.3 and development commit 8c73bf3.
CVSS 3.1CRITICAL 10.0· Network · No auth · No interaction · EPSS 0.01667 · Published 2021-06-17 · No fix listed CWE-125
Priority MEDIUM 44
A specifically crafted packet sent by an attacker to EIPStackGroup OpENer EtherNet/IP commits and versions prior to Feb 10, 2021 may cause a denial-of-service condition.
CVSS 3.1HIGH 8.2· Network · No auth · No interaction · EPSS 0.01156 · Published 2022-05-12 · Fixed in Feb 10, 2021 CWE-681
Priority MEDIUM 42
A specifically crafted packet sent by an attacker to EIPStackGroup OpENer EtherNet/IP commits and versions prior to Feb 10, 2021 may result in a denial-of-service condition.
CVSS 3.1HIGH 7.5· Network · No auth · No interaction · EPSS 0.01346 · Published 2022-05-12 · Fixed in Feb 10, 2021 CWE-617
Priority MEDIUM 42
A specifically crafted packet sent by an attacker to EIPStackGroup OpENer EtherNet/IP commits and versions prior to Feb 10, 2021 may result in a denial-of-service condition.
CVSS 3.1HIGH 7.5· Network · No auth · No interaction · EPSS 0.01346 · Published 2022-05-12 · Fixed in Feb 10, 2021 CWE-617
Priority MEDIUM 42
A specifically crafted packet sent by an attacker to EIPStackGroup OpENer EtherNet/IP commits and versions prior to Feb 10, 2021 may allow the attacker to read arbitrary data.
CVSS 3.1HIGH 7.5· Network · No auth · No interaction · EPSS 0.01354 · Published 2022-05-12 · Fixed in Feb 10, 2021 CWE-125
Priority LOW 37
A denial-of-service vulnerability exists in the Ethernet/IP server functionality of the EIP Stack Group OpENer 2.3 and development commit 8c73bf3.
CVSS 3.1HIGH 7.5· Network · No auth · No interaction · EPSS 0.02088 · Published 2020-12-11 · No fix listed CWE-910
Priority LOW 36
EIPStackGroup OpENer v2.3.0 was discovered to contain a stack overflow via /bin/posix/src/ports/POSIX/OpENer+0x56073d.
CVSS 3.1HIGH 7.8· Local · No auth · User interaction · EPSS 0.00854 · Published 2022-07-15 · No fix listed CWE-787