Void Blizzard

Russian State-Supported Group LAUNDRY BEAR Exploits Zero-Day CVE-2025-66376 in Zimbra Collaboration Suite

Synacor’s Zimbra Collaboration Suite was targeted in a zero-day campaign by the Russian state-backed threat actor known as LAUNDRY BEAR. The stored cross-site scripting flaw in the webmail stylesheet handler allowed attackers to steal past emails simply by having victims view a specially crafted HTML message. No user interaction beyond opening the email was required for JavaScript execution in the browser. On 23 July 2026, sixteen countries including the United States, European nations and Australia issued a joint advisory signed by twenty-seven agencies such as NSA, FBI and CISA. The vulnerability received CVE-2025-66376 and a CVSS v3.1 base score of 7.2, rated High. Analysts assess the campaign focused on intelligence collection against Western government and corporate targets.

US Accuses Russian Cybersecurity Specialist D.O. of Void Blizzard Attacks on European Governments and US Companies, Kaspersky Ties Emerge

American authorities have charged Russian information security specialist D.O. with participating in cyberattacks by the Void Blizzard group, also known as Laundry Bear, targeting NATO-aligned European government agencies and at least 11 US companies since 2023. D.O., who previously held a senior position at one of Russia’s largest cybersecurity firms widely identified as Kaspersky, did not plead guilty during a court hearing in Boston. The US Department of Commerce banned the company’s software in 2024 over national security concerns, while European agencies had issued similar warnings earlier. Prosecutors also linked D.O. to a Nizhny Novgorod IT company where he served as deputy director from 2024, although his earlier Kaspersky employment was confirmed through salary records and a former colleague rather than the indictment itself. D.O. graduated from Bauman Moscow State Technical University with a degree in information security, an institution previously flagged by European journalists as a potential training ground for state-linked operatives. Experts note that movement between commercial cybersecurity roles and intelligence structures occurs across countries, but D.O.’s guilt remains to be proven in court.