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Cisco disclosed a critical authentication bypass, CVE-2026-76504, in the API session-based authentication management of Cisco Catalyst SD-WAN Manager. An unauthenticated, remote attacker can send a crafted HTTP request and gain access to the API with the privileges of the admin user. Cisco has released software updates and states that no …
Cisco disclosed multiple critical vulnerabilities in the Next Generation OAM (NGOAM) feature of Cisco NX-OS Software, affecting Cisco Nexus 3000 Series and Nexus 9000 Series switches. An unauthenticated, remote attacker could execute arbitrary code with root privileges or cause a denial of service (DoS) on an affected device. The flaws ar…
Cisco disclosed a critical vulnerability, CVE-2026-76471, in the NX-API feature of Cisco NX-OS Software. An unauthenticated, remote attacker could use it to execute arbitrary code with root privileges or to cause a denial of service on an affected device. Cisco rates the Security Impact as Critical. Software updates are available and no w…
Cisco disclosed that CVE-2026-76519, a critical (CVSS 9.8) flaw in Secure Email Gateway (SEG), has been exploited as a zero-day before a fix was available. A remote, unauthenticated attacker can write files and execute commands as root on the appliance simply by sending a malicious email. CISA added the flaw to its Known Exploited Vulnera…
EG Secure Solutions warns that CVE-2026-106931, an OS command injection flaw in the statistics function of SiteGuard Server Edition, a Japanese host-based WAF, is being exploited in the wild. Successful exploitation lets an attacker run commands as root or SYSTEM on the server hosting the product. The flaw is rated CVSS 4.0 8.5 and CVSS 3…
Arista Networks released security updates for CVE-2026-114625, a critical (CVSS 9.9) zero-day SQL injection in VeloCloud Orchestrator (VCO) that is being actively exploited. Any authenticated user, even with the lowest built-in Enterprise Read Only role, who can reach the VCO web interface can escalate to operator privileges and masquerad…
Two critical vulnerabilities in the PHP engine, collectively referred to as PHP2Shell, prompted emergency security releases on 21 October 2026 after details leaked on 20 October ahead of the planned disclosure. The UK NCSC urged organisations to identify affected systems and update immediately, and Amazon threat intelligence reported expl…
Horizon3.ai has released a public proof-of-concept exploit for CVE-2026-106173, a critical flaw in Fortinet FortiSIEM that lets unauthenticated attackers turn an arbitrary file write into remote code execution. Researcher Zach Hanley published the technical analysis on October 20, following Fortinet's advisory FG-IR-26-180 of October 13. …
Ivanti released its October 2026 security update on 13 October 2026. It fixes the actively exploited Connect Secure zero-day CVE-2026-104935, a spoofing-based authentication bypass that lets remote, unauthenticated attackers execute arbitrary commands (cert.ssi.gouv.fr, darkwebinformer.com). The flaw was discovered by Volexity, which trac…
Hacktron AI researchers disclosed CVE-2026-33439 (CVSS 9.8, CWE-502), an unauthenticated remote code execution flaw in OpenIdentityPlatform OpenAM 16.0.5 and earlier. It is a variant of CVE-2021-35464: the earlier fix whitelisted deserialization for the jato.pageSession parameter but left the sibling jato.clientSession parameter unfiltere…
Cisco disclosed a critical vulnerability, CVE-2026-76465, in the MPLS Operation, Administration, and Maintenance (OAM) feature of Cisco NX-OS Software for Cisco Nexus 3000 Series and Nexus 9000 Series switches. An unauthenticated, remote attacker could execute arbitrary code with root privileges or cause a denial of service (DoS) on an af…
On 24 September 2026, GreyNoise observed a malicious actor using 149.104.78.141 to attempt pre-disclosure zero-day exploitation of a Citrix NetScaler Gateway on a Project Swarm participant sensor. No CVE-specific detections existed at the time, but behavioral detections labeled the activity malicious within seconds. The attempt failed to …
Dutch authorities arrested a 24-year-old, reportedly Pepijn van der Stap (alias "Umbreon"), around Sept. 16, 2026 on suspicion of aiding data thefts and extortions by ShinyHunters. Van der Stap was previously convicted in 2023 for data theft and extortion. Days after the arrest, remaining ShinyHunters members escalated, breaching the FBI …
The PHP security team released emergency fixes on October 21, 2026 for two critical core flaws, CVE-2026-109618 and CVE-2026-109619, nicknamed PHP2Shell. Both are rated CVSS v4.0 9.2 and allow unauthenticated remote code execution (RCE) as the web worker account. They can also expose process memory that may hold credentials and API keys (…
Zeabur, a developer hosting and deployment platform, disclosed that on October 14-15, 2026 an attacker used leaked internal credentials stored in plaintext to compromise its shared clusters, some Dedicated Servers and internal systems, and ultimately read the production database. The breach affected shared clusters in nine regions, 321,81…
Microsoft's October 2026 Patch Tuesday is a record release of roughly 1,415 new CVEs, the first four-digit volume ever, larger than any previous full year of Microsoft patches. Only one flaw is under active attack: CVE-2026-96951, a Windows Shell security feature bypass that evades Mark of the Web (MotW) protections. Two others are public…
Microsoft assesses that the China-aligned actor Storm-0940 used the agentic AI penetration testing framework ARTEX to compromise the Microsoft 365 tenants of ConnectWise, then pivoted to its downstream customers. The campaign began in September 2026 and targeted hundreds of organizations worldwide across aerospace and defense, energy, fin…
This SentinelOne weekly roundup (Week 41, 2026) covers law enforcement actions, a phishing campaign and an actively exploited vulnerability. The most urgent item is CVE-2026-21589, a critical (CVSS 9.3) unauthenticated arbitrary file access flaw in Atlassian Data Center products. Exploitation attempts began about two hours after a public …
Microsoft attributed the recent supply chain compromise of the ConnectWise Cloud Backup application to Storm-0940, a China state-aligned actor. The actor used ARTEX, a Go-based agentic AI penetration testing framework, to automate reconnaissance, password spraying and OAuth application abuse at "machine speed" against hundreds of organiza…
Attackers began exploiting Plex2Shell, a chain of four Plex Media Server vulnerabilities (CVE-2026-96652, CVE-2026-96654, CVE-2026-96655, CVE-2026-96656), on October 17, 2026. That was about a day after researcher Zach Main published a write-up on October 16, with a PoC following (bleepingcomputer.com dates the PoC to October 19, three da…
