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Active Exploitation Attempts Target WSO2 API Manager JWT Bypass With Forged Admin Tokens
watchTowr observed active exploitation of CVE-2026-5430, a WSO2 API Manager JWT bypass using forged admin tokens, risking credential theft and account takeover.
CVE-2026-5430 (CVSS 9.8-10.0), an improper cryptographic signature verification flaw in WSO2 API Manager, lets JWT authentication be bypassed with unsupported algorithms, enabling administrative account takeover. watchTowr honeypots captured forged JWT tokens with baked-in administrator privileges on September 13, 2026, which could expose API credentials, consumer keys, and secrets for every registered application. Affected products include WSO2 API Manager 4.1.0-4.6.0, API Control Plane, Traffic Manager, and Universal Gateway. Fixes are available via GitHub pull requests and subscription update levels, and users are urged to patch immediately.
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Wärtsilä FOS-Onboard
CISA advisory: two hardcoded cryptographic key flaws in Wärtsilä FOS-Onboard 5.07.0923.01 (CVSS 9.0/9.1) could allow unauthorized updates, code execution, and credential theft.
CISA advisory ICSA-26-258-02 discloses CVE-2026-78225 (CVSS 3.1 9.0 critical), a hardcoded cryptographic server key in the deployer-ng Update Controller of Wärtsilä FOS-Onboard 5.07.0923.01. CVE-2026-81855 (CVSS 3.1 9.1 critical) is a hardcoded client authentication key in the robot testing framework component. Successful exploitation could let an attacker deliver unauthorized updates, execute code, or extract credentials to impersonate a privileged client. The product is deployed worldwide in transportation systems critical infrastructure; Cydome Security reported the flaws and CISA states no known public exploitation exists.
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CISA tells operators to harden Siemens S7 PLCs. Here’s how to do it without disrupting production
CISA, NSA, FBI and other agencies warn of active targeting of internet-exposed Siemens S7 PLCs and urge patching, exposure removal and hardening.
Joint advisory AA26-231A from the NSA, CISA, FBI, Department of Energy and EPA warns that actors are actively targeting Siemens S7 PLCs using internet scanning, AI-assisted scripts and libraries such as Snap7 and python-snap7 over S7comm on TCP port 102. The advisory covers S7-200 through S7-1500 series controllers and recommends patching, removing internet exposure, access controls, monitoring and disabling unneeded services. Siemens states no new S7 vulnerabilities are involved, only misconfigurations addressed in existing ProductCERT guidance SSB-104599. The article details how to apply each measure without breaking production dependencies such as remote I/O, HMI links and diagnostics.
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ASUS Control Center Critical Flaw Allows Unauthenticated Attackers to Gain Root Access
ASUS patched CVE-2026-19397 (CVSS 7.7) in Control Center Express Agent, letting unauthenticated nearby attackers with an active session take over the host.
ASUS released version 1.7.24 of Control Center Express Agent to fix CVE-2026-19397, a CWE-306 missing-authentication flaw scored 7.7 on CVSS v4. Exploitation requires an active login session on the target and nearby network access, and agent compromise could lead to complete device takeover where the agent runs with elevated privileges. ASUS also issued a same-day advisory for Armory Crate covering ten additional CVEs.
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CVE-2026-34908: UniFi OS Auth Bypass Vulnerability
Ubiquiti disclosed CVE-2026-34908, a CVSS 10.0 authentication bypass in UniFi OS letting network-adjacent attackers alter device configuration without credentials.
CVE-2026-34908 is an improper access control flaw (CWE-284) in Ubiquiti UniFi OS devices, disclosed in UI Security Advisory Bulletin 064, with a CVSS 3.1 base score of 10.0. An unauthenticated network-adjacent attacker can bypass access controls and modify system configuration, with scope-changed impact on downstream network services such as routing, VPN, and connected access points. Fixed firmware is available, and workarounds include restricting management ports to trusted subnets, isolating management interfaces on a dedicated VLAN, and disabling remote access features. No public proof-of-concept code was observed at the time of publication.
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