19th May 2026 Cyber Update: Exchange Zero-Day Puts On-Prem Mail Servers Back in the Spotlight
Microsoft has confirmed active exploitation of CVE-2026-42897, putting exposed on-prem Exchange and Outlook Web Access environments back under pressure.
Since early 2022, the British government has tied Iran to over 20 plots threatening UK citizens, reflecting Tehran’s expanding covert tactics. These attempts—spanning assassination, kidnapping, and surveillance—mark a significant escalation on British soil.
In a recent address to Parliament, UK Security Minister Dan Jarvis disclosed that MI5 has countered 20 Iran-linked plots posing lethal risks to British citizens and residents since January 2022. This alarming revelation underscores a 48% spike in state-threat investigations last year, encompassing suspected sabotage by Russian intelligence, Chinese espionage, and Iran’s aggressive efforts to silence dissidents through intimidation and violence. Jarvis emphasized,
“The Iranian regime has become increasingly emboldened, asserting itself more aggressively to advance their objectives and undermine ours,”
highlighting a marked increase in direct actions against UK targets. These threats, ranging from targeting political critics to media outlets and Jewish communities worldwide, reflect Tehran’s growing reliance on transnational repression to suppress opposition.
For too long, the Iranian state has threatened and intimidated those in Iran and abroad who dared to stand up to the regime.
— Dan Jarvis MP (@DanJarvisMBE) March 4, 2025
The measures we’ve announced today will reduce the threat from the Iranian Intelligence Services and help keep our country safe.https://t.co/MPx0uqju1L pic.twitter.com/1maDx5RGPF
The British government’s response includes intensified measures, such as sanctions against figures like Naji Sharifi Zindashti, an alleged Iranian operative tied to a murder-for-hire scheme in the US, and members of the Islamic Revolutionary Guard Corps Unit 840, implicated in a $200,000 assassination plot against journalists from Iran International. This TV station, critical of Tehran, relocated to the US after deeming the UK unsafe. Jarvis reiterated the government’s resolve, stating,
“It is clear that these plots are a conscious strategy of the Iranian regime to stifle criticism through intimidation and fear. These threats are unacceptable. They must and will be defended against at every turn.”
To bolster defenses, the upcoming Foreign Influence Registration Scheme will mandate Iran’s proxies to register activities or face severe penalties, while a review by Jonathan Hall KC aims to modernize counterterrorism strategies against such state-sponsored threats.
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