CVE-2026-51538

EIPStackGroup OpENer 2.3.0 commit 76b95cf suffers from an Incorrect Access Control vulnerability in its handling of encapsulation sessions. When the server processes critical encapsulation commands, it verifies whether the provided sessionhandle exists in the global session list, but it fails to...

CVE-2026-51537: Out-of-bounds Read

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. An attacker can send a valid ENIP outer frame carrying a malformed CIP ForwardOpen/LargeForwardOpen request, causing the parser...

CVE-2026-51536

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. Specifically, an upstream length calculated as an int is passed to a downstream function that expects an EipInt16 a 16-bit signe...

CVE-2026-51540

OpENer version 2.3.0 (master branch up to commit 76b95cf ) is vulnerable to a severe memory corruption issue. The flaw is caused by an integer underflow occurring during the processing of connected explicit messages within the SendUnitData() function. Exploitation details are not provided in the ...

CVE-2026-51537

The EIPStackGroup OpENer software (version 2.3.0 , commit 76b95cf ) contains an out-of-bounds read vulnerability within the Connection Manager . The flaw exists during the handling of ForwardOpen requests when processing short, malformed packets. Specifically, an attacker can send a valid Etherne...

CVE-2026-51536

OpENer version 2.3.0 (commit 76b95cf) is vulnerable to a Stack Buffer Overflow during the parsing of incoming Common Industrial Protocol (CIP) network packets. The root cause is an inconsistent typing of the length parameter across the call stack; an upstream length calculated as an int is passed...

CVE-2026-51536: Integer Overflow or Wraparound

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. Specifically, an upstream length calculated as an int is passed to a downstream function that expects an EipInt16 a 16-bit signe...

CVE-2026-51538: Improper Access Control

EIPStackGroup OpENer 2.3.0 commit 76b95cf suffers from an Incorrect Access Control vulnerability in its handling of encapsulation sessions. When the server processes critical encapsulation commands, it verifies whether the provided sessionhandle exists in the global session list, but it fails to...

CVE-2026-51540: Integer Underflow (Wrap or Wraparound)

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...

CVE-2026-51541

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. An attacker can send a valid ENIP SendRRData frame carrying a very short CIP payload whose pathsize field claims that many more path words are...

PT-2026-57911

Name of the Vulnerable Software and Affected Versions OpENer version 2.3.0 master branch up to commit 76b95cf Description A severe memory corruption issue exists due to an integer underflow during the processing of connected explicit messages within the SendUnitData function. An integer underflow...

CVE-2026-51537

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. An attacker can send a valid ENIP outer frame carrying a malformed CIP ForwardOpen/LargeForwardOpen request, causing the parser...

PT-2026-57876

Name of the Vulnerable Software and Affected Versions EIPStackGroup OpENer version 2.3.0 commit 76b95cf Description An out-of-bounds read occurs in the Connection Manager when handling ForwardOpen requests during the processing of short malformed packets. An unauthenticated remote attacker can...

PT-2026-57875

Name of the Vulnerable Software and Affected Versions OpENer version 2.3.0 Description An issue exists when parsing incoming Common Industrial Protocol CIP network packets where the length parameter is inconsistently typed across the call stack. An upstream length calculated as an int is passed t...

CVE-2026-51541: Out-of-bounds Read

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. An attacker can send a valid ENIP SendRRData frame carrying a very short CIP payload whose pathsize field claims that many more path words are...

CVE-2026-51540

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...

CVE-2026-51537

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. An attacker can send a valid ENIP outer frame carrying a malformed CIP ForwardOpen/LargeForwardOpen request, causing the parser...

CVE-2026-51536

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. Specifically, an upstream length calculated as an int is passed to a downstream function that expects an EipInt16 a 16-bit signe...

CVE-2026-55659

Grist is spreadsheet software using Python as its formula language. Prior to 1.7.15, several server-rendered Grist pages embedded user-controlled values into the page and into inline scripts without fully escaping them, allowing cross-site scripting. On the main application page, a document's nam...

CVE-2026-55659 Grist: XSS through unsafe value interpolation in server-rendered pages

Grist is spreadsheet software using Python as its formula language. Prior to 1.7.15, several server-rendered Grist pages embedded user-controlled values into the page and into inline scripts without fully escaping them, allowing cross-site scripting. On the main application page, a document's nam...