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CWE-303

Incorrect Implementation of Authentication Algorithm

74 CVEs Avg CVSS 7.7 MITRE
19
CRITICAL
30
HIGH
24
MEDIUM
1
LOW
12
POC
1
KEV

Monthly

CVE-2026-9854 Sep 03, 07:55 HIGH This Week

Privilege escalation in Hitachi Energy MicroSCADA SYS600 allows any user with access to the engineering tools to elevate their privileges to Windows administrator on the underlying host machine, achieving full operating-system control. The flaw resides in the RBAC enforcement layer (CWE-303 - incorrect implementation of the authentication/authorization algorithm), meaning the mechanism that is supposed to constrain engineering-tool users to scoped permissions fails to enforce those boundaries against the Windows OS layer. Exploitation yields complete control of the host, directly threatening the availability, integrity, and confidentiality of the SCADA environment. No public exploit or CISA KEV listing has been identified at time of analysis.

Microscada Sys600
NVD VulDB
CVSS 4.0
8.5
EPSS
0.1%
CVE-2026-9853 Sep 03, 07:53 HIGH This Week

Broken application-layer authentication in Hitachi Energy MicroSCADA SYS600 allows any user with an operating system account on the hosting server to read and modify SYS600 application objects without possessing SYS600 credentials. Because the application relies on OS-level authentication rather than enforcing its own access controls (CWE-303), the SYS600 authentication boundary is effectively bypassed for all local OS users. In a SCADA environment managing electrical distribution infrastructure, this means OS-resident users - such as IT staff, contractors, or service accounts - can tamper with power system application objects without SCADA authorization, carrying high real-world consequences.

Microscada Sys600
NVD VulDB
CVSS 4.0
8.5
EPSS
0.1%
CVE-2026-49467 Aug 12, 17:02 HIGH PATCH This Week

Pingvin Share X versions 1.5.0 through 1.18.0 expose an authentication bypass in TOTP management endpoints due to a JavaScript async/await coding defect. An authenticated attacker with a low-privileged account can modify or disable TOTP two-factor authentication settings on an account without supplying a correct password, effectively neutralizing 2FA protections. No active exploitation has been identified in CISA KEV, and no public exploit code has been reported, but the bypass is trivially reachable by any valid user of an affected self-hosted instance.

Authentication Bypass Pingvin Share X
NVD GitHub
CVSS 3.1
8.8
EPSS
0.4%
CVE-2026-66411 Aug 10, 08:13 MEDIUM This Month

Remote unauthenticated control of Ecovacs Robotics DEEBOT PRO M1 and K1VAC robot vacuums is possible due to an incorrectly implemented authentication algorithm in their WebSocket communications interface. Any network-reachable attacker can connect to and issue operational commands to affected robots without valid credentials (AV:N, PR:N per CVSS vector). No public exploit code has been identified at time of analysis and this vulnerability is not listed in the CISA KEV catalog.

Information Disclosure Deebot Pro M1 Deebot Pro K1Vac
NVD VulDB
CVSS 4.0
6.9
EPSS
0.4%
CVE-2026-11430 Aug 07, 19:17 MEDIUM PATCH This Month

Unauthenticated remote attackers can trigger operator-configured scheduled jobs in Grav CMS when the scheduler-webhook plugin is installed and misconfigured, due to a compound-conditional short-circuit (CWE-303) that skips token validation entirely when no webhookToken is set. The primitive is job-triggering rather than attacker-controlled command injection: RCE is only achievable when an administrator has separately configured a scheduled job that shells out, a condition the attacker cannot influence. No public exploit has been identified at time of analysis, and the vendor-released fix is available in Grav v2.0.9.

RCE Authentication Bypass
NVD VulDB GitHub
CVSS 4.0
6.9
EPSS
0.5%
CVE-2026-59309 Jul 30, 12:19 CRITICAL PATCH NEWS Act Now

Authentication bypass in VMware vCenter's Directory Service (vmdir) lets an attacker with network reachability to vCenter defeat the authentication algorithm and obtain unauthorized access without valid credentials. Because vCenter is the central management plane for vSphere environments, this exposes control over the entire virtual estate; the flaw is remotely exploitable with no privileges or user interaction (CVSS 9.8). At time of analysis there is no public exploit identified and it is not listed in CISA KEV, but the reporting vendor (VMware/Broadcom) rates it critical.

VMware Authentication Bypass Cloud Foundation Vsphere Foundation Vcenter +2
NVD VulDB
CVSS 3.1
9.8
EPSS
0.7%
CVE-2026-66028 Jul 27, 18:17 HIGH This Week

Unauthorized account access in Ekushey Project Manager CRM allows authenticated administrators to create duplicate client accounts with identical email and password credentials. An authenticated admin can exploit the missing email uniqueness enforcement to create conflicting account states, causing unpredictable authentication and potential unauthorized access to victim accounts. A proof-of-concept exploit is publicly available.

Authentication Bypass
NVD GitHub
CVSS 4.0
7.1
EPSS
0.3%
CVE-2026-57852 Jul 20, 22:17 MEDIUM This Month

Unauthenticated triggering of all configured scheduled jobs in Grav CMS's scheduler-webhook plugin is possible due to a null short-circuit logic flaw in webhook token validation, allowing any network-reachable attacker to execute operator-defined commands under the web server process account via a single POST request. The affected component is the scheduler-webhook plugin for Grav CMS, a PHP flat-file CMS; the CVSS 4.0 vector (AC:H/AT:P) confirms exploitation requires the plugin to be installed with configured jobs and an exposed endpoint - not a default Grav deployment. No active exploitation has been confirmed (not in CISA KEV) and no public exploit code has been identified at time of analysis.

Authentication Bypass
NVD GitHub
CVSS 4.0
6.3
EPSS
0.4%
CVE-2026-47300 Jul 14, 18:20 NuGet HIGH PATCH GHSA Exploit Unlikely This Week

Privilege elevation in ASP.NET Core (bundled with .NET 8.0, 9.0, and 10.0) lets an already-authenticated, low-privileged network attacker gain higher privileges by abusing a flawed authentication algorithm implementation (CWE-303). Microsoft reported the flaw and has released a patch; there is no public exploit identified at time of analysis and it is not on the CISA KEV. The 8.8 CVSS reflects high confidentiality, integrity, and availability impact reachable over the network with only low prior privileges.

Information Disclosure Net 10 0 Net 8 0 Net 9 0 Microsoft Visual Studio 2022 Version 17 12 +4
NVD VulDB GitHub HeroDevs
CVSS 3.1
8.8
EPSS
0.5%
CVE-2026-50360 Jul 14, 17:06 HIGH PATCH This Week

Privilege escalation in Microsoft Windows SMB Server allows an already-authenticated network attacker to elevate to higher privileges by abusing a flawed authentication algorithm, yielding high confidentiality, integrity, and availability impact. The flaw affects Windows 10 (21H2/22H2), Windows 11 (24H2/25H2/26H1), and Windows Server 2022/2025 including Server Core. Reported by Microsoft with a patch available; no public exploit identified at time of analysis.

Microsoft Information Disclosure Windows 10 Version 21H2 Windows 10 Version 22H2 Windows 11 Version 24H2 +5
NVD
CVSS 3.1
8.8
EPSS
0.5%
EPSS 0% CVSS 8.5
HIGH This Week

Privilege escalation in Hitachi Energy MicroSCADA SYS600 allows any user with access to the engineering tools to elevate their privileges to Windows administrator on the underlying host machine, achieving full operating-system control. The flaw resides in the RBAC enforcement layer (CWE-303 - incorrect implementation of the authentication/authorization algorithm), meaning the mechanism that is supposed to constrain engineering-tool users to scoped permissions fails to enforce those boundaries against the Windows OS layer. Exploitation yields complete control of the host, directly threatening the availability, integrity, and confidentiality of the SCADA environment. No public exploit or CISA KEV listing has been identified at time of analysis.

Microscada Sys600
NVD VulDB
EPSS 0% CVSS 8.5
HIGH This Week

Broken application-layer authentication in Hitachi Energy MicroSCADA SYS600 allows any user with an operating system account on the hosting server to read and modify SYS600 application objects without possessing SYS600 credentials. Because the application relies on OS-level authentication rather than enforcing its own access controls (CWE-303), the SYS600 authentication boundary is effectively bypassed for all local OS users. In a SCADA environment managing electrical distribution infrastructure, this means OS-resident users - such as IT staff, contractors, or service accounts - can tamper with power system application objects without SCADA authorization, carrying high real-world consequences.

Microscada Sys600
NVD VulDB
EPSS 0% CVSS 8.8
HIGH PATCH This Week

Pingvin Share X versions 1.5.0 through 1.18.0 expose an authentication bypass in TOTP management endpoints due to a JavaScript async/await coding defect. An authenticated attacker with a low-privileged account can modify or disable TOTP two-factor authentication settings on an account without supplying a correct password, effectively neutralizing 2FA protections. No active exploitation has been identified in CISA KEV, and no public exploit code has been reported, but the bypass is trivially reachable by any valid user of an affected self-hosted instance.

Authentication Bypass Pingvin Share X
NVD GitHub
EPSS 0% CVSS 6.9
MEDIUM This Month

Remote unauthenticated control of Ecovacs Robotics DEEBOT PRO M1 and K1VAC robot vacuums is possible due to an incorrectly implemented authentication algorithm in their WebSocket communications interface. Any network-reachable attacker can connect to and issue operational commands to affected robots without valid credentials (AV:N, PR:N per CVSS vector). No public exploit code has been identified at time of analysis and this vulnerability is not listed in the CISA KEV catalog.

Information Disclosure Deebot Pro M1 Deebot Pro K1Vac
NVD VulDB
EPSS 1% CVSS 6.9
MEDIUM PATCH This Month

Unauthenticated remote attackers can trigger operator-configured scheduled jobs in Grav CMS when the scheduler-webhook plugin is installed and misconfigured, due to a compound-conditional short-circuit (CWE-303) that skips token validation entirely when no webhookToken is set. The primitive is job-triggering rather than attacker-controlled command injection: RCE is only achievable when an administrator has separately configured a scheduled job that shells out, a condition the attacker cannot influence. No public exploit has been identified at time of analysis, and the vendor-released fix is available in Grav v2.0.9.

RCE Authentication Bypass
NVD VulDB GitHub
EPSS 1% CVSS 9.8
CRITICAL PATCH Act Now

Authentication bypass in VMware vCenter's Directory Service (vmdir) lets an attacker with network reachability to vCenter defeat the authentication algorithm and obtain unauthorized access without valid credentials. Because vCenter is the central management plane for vSphere environments, this exposes control over the entire virtual estate; the flaw is remotely exploitable with no privileges or user interaction (CVSS 9.8). At time of analysis there is no public exploit identified and it is not listed in CISA KEV, but the reporting vendor (VMware/Broadcom) rates it critical.

VMware Authentication Bypass Cloud Foundation +4
NVD VulDB
EPSS 0% CVSS 7.1
HIGH This Week

Unauthorized account access in Ekushey Project Manager CRM allows authenticated administrators to create duplicate client accounts with identical email and password credentials. An authenticated admin can exploit the missing email uniqueness enforcement to create conflicting account states, causing unpredictable authentication and potential unauthorized access to victim accounts. A proof-of-concept exploit is publicly available.

Authentication Bypass
NVD GitHub
EPSS 0% CVSS 6.3
MEDIUM This Month

Unauthenticated triggering of all configured scheduled jobs in Grav CMS's scheduler-webhook plugin is possible due to a null short-circuit logic flaw in webhook token validation, allowing any network-reachable attacker to execute operator-defined commands under the web server process account via a single POST request. The affected component is the scheduler-webhook plugin for Grav CMS, a PHP flat-file CMS; the CVSS 4.0 vector (AC:H/AT:P) confirms exploitation requires the plugin to be installed with configured jobs and an exposed endpoint - not a default Grav deployment. No active exploitation has been confirmed (not in CISA KEV) and no public exploit code has been identified at time of analysis.

Authentication Bypass
NVD GitHub
EPSS 1% CVSS 8.8
HIGH PATCH Exploit Unlikely This Week

Privilege elevation in ASP.NET Core (bundled with .NET 8.0, 9.0, and 10.0) lets an already-authenticated, low-privileged network attacker gain higher privileges by abusing a flawed authentication algorithm implementation (CWE-303). Microsoft reported the flaw and has released a patch; there is no public exploit identified at time of analysis and it is not on the CISA KEV. The 8.8 CVSS reflects high confidentiality, integrity, and availability impact reachable over the network with only low prior privileges.

Information Disclosure Net 10 0 Net 8 0 +6
NVD VulDB GitHub HeroDevs
EPSS 1% CVSS 8.8
HIGH PATCH This Week

Privilege escalation in Microsoft Windows SMB Server allows an already-authenticated network attacker to elevate to higher privileges by abusing a flawed authentication algorithm, yielding high confidentiality, integrity, and availability impact. The flaw affects Windows 10 (21H2/22H2), Windows 11 (24H2/25H2/26H1), and Windows Server 2022/2025 including Server Core. Reported by Microsoft with a patch available; no public exploit identified at time of analysis.

Microsoft Information Disclosure Windows 10 Version 21H2 +7
NVD

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