CVE-2026-11826: Heap-based Buffer Overflow

OpenPLCv3 contains a heap-based buffer overflow in the getData function in webserver/core/modbusmaster.cpp. getData reads characters between two delimiters into a caller-supplied buffer with no size parameter and no bounds check. In parseConfig the function is invoked with the 100-byte...

CVE-2026-28205

OpenPLCV3 is vulnerable to an Initialization of a Resource with an Insecure Default vulnerability which could allow an attacker to gain access to the system by bypassing authentication via an API...

CVE-2026-35063

OpenPLCV3 REST API endpoint checks for JWT presence but never verifies the caller's role. Any authenticated user with role=user can delete any other user, including administrators, by specifying their user ID or they can create new accounts with role=admin, escalating to full administrator access...

CVE-2026-35556

OpenPLCV3 is vulnerable to a Plaintext Storage of a Password vulnerability that could allow an attacker to retrieve credentials and access sensitive information...

CVE-2026-35063 Missing Authorization in OpenPLC_V3

OpenPLCV3 REST API endpoint checks for JWT presence but never verifies the caller's role. Any authenticated user with role=user can delete any other user, including administrators, by specifying their user ID or they can create new accounts with role=admin, escalating to full administrator access...

CVE-2026-35556 Plaintext storage of a password in OpenPLC_V3

OpenPLCV3 is vulnerable to a Plaintext Storage of a Password vulnerability that could allow an attacker to retrieve credentials and access sensitive information...

CVE-2026-35556

CVE-2026-35556 affects OpenPLC_V3 and describes a Plaintext Storage of a Password vulnerability. The root issue is that credentials can be stored in plaintext, enabling an attacker to retrieve credentials and access sensitive information. The provided metrics indicate a high impact on confidentia...

CVE-2026-28205

Technical details beyond the description are not publicly provided in the supplied documents. Monitor for updates on affected versions, root cause, and remediation.

CVE-2026-28205 Initialization of a resource with an insecure default in OpenPLC_V3

OpenPLCV3 is vulnerable to an Initialization of a Resource with an Insecure Default vulnerability which could allow an attacker to gain access to the system by bypassing authentication via an API...

CVE-2026-28205 Initialization of a resource with an insecure default in OpenPLC_V3

OpenPLCV3 is vulnerable to an Initialization of a Resource with an Insecure Default vulnerability which could allow an attacker to gain access to the system by bypassing authentication via an API...

CVE-2026-35063: Missing Authorization

OpenPLCV3 REST API endpoint checks for JWT presence but never verifies the caller's role. Any authenticated user with role=user can delete any other user, including administrators, by specifying their user ID or they can create new accounts with role=admin, escalating to full administrator access...

CVE-2026-35556: Plaintext Storage of a Password

OpenPLCV3 is vulnerable to a Plaintext Storage of a Password vulnerability that could allow an attacker to retrieve credentials and access sensitive information...

CVE-2026-28205: Initialization of a Resource with an Insecure Default

OpenPLCV3 is vulnerable to an Initialization of a Resource with an Insecure Default vulnerability which could allow an attacker to gain access to the system by bypassing authentication via an API...

CVE-2025-13970 OpenPLC_V3 Cross-Site Request Forgery

OpenPLCV3 is vulnerable to a cross-site request forgery CSRF attack due to the absence of proper CSRF validation. This issue allows an unauthenticated attacker to trick a logged-in administrator into visiting a maliciously crafted link, potentially enabling unauthorized modification of PLC settin...

CVE-2025-13970: Cross-Site Request Forgery (CSRF)

OpenPLCV3 is vulnerable to a cross-site request forgery CSRF attack due to the absence of proper CSRF validation. This issue allows an unauthenticated attacker to trick a logged-in administrator into visiting a maliciously crafted link, potentially enabling unauthorized modification of PLC settin...

OpenPLC_V3 (Update A)

RISK EVALUATION Successful exploitation of this vulnerability could result in the alteration of PLC settings or the upload of malicious programs. 2. RECOMMENDED PRACTICES CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability, such as: Minimize...

CVE-2025-54811

CVE-2025-54811 concerns OpenPLC_V3. The vulnerability is in the enipThread function due to a missing return value, causing a crash when the server loop ends and an illegal ud2 is executed. It can be triggered remotely without authentication by starting the same server multiple times or if the ser...

CVE-2025-54811: Reliance on Undefined, Unspecified, or Implementation-Defined Behavior

OpenPLCV3 has a vulnerability in the enipThread function that occurs due to the lack of a return value. This leads to a crash when the server loop ends and execution hits an illegal ud2 instruction. This issue can be triggered remotely without authentication by starting the same server multiple...

CVE-2025-1066 CVE-2025-1066

OpenPLCV3 contains an arbitrary file upload vulnerability, which could be leveraged for malvertising or phishing campaigns...

CVE-2025-1066

OpenPLC_V3 is susceptible to an arbitrary file upload vulnerability. This flaw could be leveraged by attackers to facilitate malvertising or phishing campaigns . The affected software is an open-source programmable logic controller used for automation and research. No specific impacted versions a...