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Week in review: Cisco patches SD-WAN 0-day, unpatched Microsoft Exchange Server flaw exploited

ID: cd57109b-1cb4-51cc-90e1-5515cfcedbc2

STIX ID: report--cd57109b-1cb4-51cc-90e1-5515cfcedbc2

Feed Name: Help Net Security

Threat Score
70/100

Date Published: 2026-05-17

Date Updated: 2026-05-17

Author: Help Net Security

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This week-in-review newsletter summarizes a wide range of cybersecurity developments: actively exploited and recently patched vulnerabilities (including cPanel, Microsoft Exchange, Cisco SD‑WAN, Linux kernel LPEs, and dnsmasq), active attack campaigns and backdoors, significant data breaches and extortion incidents (South Staffordshire Water, Instructure/Canvas), law‑enforcement takedowns of criminal marketplaces, plus industry news on AI security, open-source tools, and product updates.

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