Top Cybersecurity Stories: SharePoint Exploits Warned by US Authorities, Citrix and WordPress Flaws Lead Weekly Rankings
Security NEXT has released its list of the ten most-read articles for the week of September 27 to October 3, 2026, reflecting strong reader interest in active vulnerability exploitation and confirmed security incidents.
Leading the ranking is a report on US authorities warning about the exploitation of five vulnerabilities in SharePoint and WordPress. Second place went to advisories covering multiple flaws in Citrix NetScaler, including two vulnerabilities already confirmed as exploited, prompting organizations to conduct compromise investigations.
Third on the list is Apple's release of iOS 26.7.1, which patches vulnerabilities that may have been used in targeted attacks against specific individuals. Fourth place covered a data breach at car-sharing service Times Car that exposed member personal information.
Further down the ranking, WordPress received another critical vulnerability disclosure requiring an update within just five days. A ransomware incident affecting some group company sales systems at Keio Electric Railway also drew significant attention.
Additional stories included a Chrome security update fixing 32 vulnerabilities, a suspected unauthorized access incident at Japan Post servers still under investigation, a zero-day flaw in Catalyst SD-WAN Manager requiring immediate updates and compromise checks, and multiple vulnerabilities addressed in PHP through newly released security updates.
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Palo Alto Networks Discloses Seven PAN-OS Vulnerabilities Including One Already Exploited in the Wild
Palo Alto Networks has published seven security advisories addressing vulnerabilities in its PAN-OS operating system used on PA-series and VM-series firewalls as well as the Panorama management platform. One flaw tracked as CVE-2026-0322 allows authenticated remote code execution with root privileges through the management interface and has already been observed in limited exploitation attempts. The company rated the issue with a CVSS v4.0 base score of 8.6 and assigned it the highest remediation priority. Four additional medium-severity issues and two low-severity issues were also fixed in the same set of advisories. Products such as Cloud NGFW and Prisma Access are confirmed to be unaffected. Palo Alto Networks urges immediate patching for all impacted PAN-OS deployments.
Critical Vulnerability CVE-2026-76519 in Cisco Secure Email Gateway Allows Arbitrary File Writes Without Authentication
Cisco Systems has disclosed a critical vulnerability in its Cisco Secure Email Gateway product that affects the Advanced Malware Protection feature responsible for processing email attachments. The flaw, tracked as CVE-2026-76519, permits unauthenticated attackers to write arbitrary files to the underlying operating system by sending a specially crafted email attachment. Successful exploitation can lead to remote command execution with root privileges. The vulnerability received a CVSS v3.1 base score of 9.8 and is rated Critical. Cisco confirmed active exploitation of the issue in October 2026, shortly after publishing the security advisory on October 14, 2026. This marks the second publicly disclosed exploited vulnerability in the product within a short period, though the flaws are unrelated.
Cyberattack Exploits Exposed Danfoss Refrigeration Controllers Across French Supermarkets
A remote cyberattack targeted Danfoss AK-SM 8xxA Series controllers in French supermarkets, allowing attackers to manipulate refrigeration parameters and trigger defrost cycles that raised temperatures and spoiled food stock. The incident impacted an estimated 250 to 350 stores belonging to major chains including Intermarché, Carrefour Market, Leclerc, and others. Paris prosecutors have opened a large-scale investigation into the attack and associated damages, including potential fires. The root cause traces to outdated software on internet-exposed OT management interfaces, with multiple CVEs enabling authentication bypass and remote code execution. Thousands of similar Danfoss systems remain publicly accessible worldwide, highlighting persistent OT exposure risks. Immediate remediation steps include closing web consoles, enforcing VPN access, and applying updates to versions 4.2 and 4.3.1 or later.
Three Zero-Days Chained in Ivanti Connect Secure Grant Root Access Without Login
An attacker chained three zero-day vulnerabilities in Ivanti Connect Secure to execute commands as root without authentication. The compromised appliance was running the fully patched version 22.8R2.4 when exploitation began on October 3. Volexity discovered the intrusion, attributed the activity to UTA0576 with low confidence in criminal rather than espionage motives, and reported the flaws to the vendor. Ivanti acknowledged limited in-the-wild exploitation on October 13. The first two issues, an authentication bypass and remote code execution, were combined under CVE-2026-104935 with a CVSS score of 8.6, allowing code execution as the cgi-server user. A third privilege-escalation flaw then elevated access to root. The final flaw lacked a patch at disclosure time, with a fix promised in an upcoming release. CISA classified the exploitation as active with total technical impact.