VulnHub

Real-time Cybersecurity News

Proton Mail brings quantum-safe email encryption to all accounts

Help Net Security
Update

Overview

Proton Mail has rolled out an optional feature called post-quantum protection for all users, including those on the free plan. This new capability generates encryption keys that aim to secure future emails from potential quantum computer attacks. To use this feature, users must update their Proton Mail apps, as older versions do not support the new encryption keys. This move is significant because it prepares users' email communications for a future where quantum computing could compromise traditional encryption methods. By enabling post-quantum protection, users can enhance the security of their encrypted emails against evolving threats.

Key Takeaways

  • Affected Systems: Proton Mail accounts across all plans
  • Action Required: Users need to update to the latest version of Proton Mail apps to enable post-quantum protection.
  • Timeline: Newly disclosed

Original Article Summary

Post-quantum protection is now available as an optional feature in Proton Mail across all plans, including the free tier. How post-quantum protection works Once enabled, Proton Mail generates new encryption keys designed to protect future encrypted emails against attacks from quantum computers. Because the feature relies on new encryption keys, users need updated Proton apps that support post-quantum protection. Older app versions do not support the new keys. “Enabling PQC helps protect new encrypted emails … More → The post Proton Mail brings quantum-safe email encryption to all accounts appeared first on Help Net Security.

Impact

Proton Mail accounts across all plans

Exploitation Status

No active exploitation has been reported at this time. However, organizations should still apply patches promptly as proof-of-concept code may exist.

Timeline

Newly disclosed

Remediation

Users need to update to the latest version of Proton Mail apps to enable post-quantum protection.

Additional Information

This threat intelligence is aggregated from trusted cybersecurity sources. For the most up-to-date information, technical details, and official vendor guidance, please refer to the original article linked below.

Related Topics: This incident relates to Update.

Read Original Article

Related Coverage

Apache fixes critical HTTP/2 double-free flaw CVE-2026-23918 enabling RCE

Security Affairs

Apache has released updates to address multiple vulnerabilities in its HTTP Server, including a serious flaw identified as CVE-2026-23918. This vulnerability, which has a CVSS score of 8.8, is a double-free error in the handling of HTTP/2 requests. If exploited, it could allow attackers to execute arbitrary code on affected systems. Organizations using Apache HTTP Server, particularly those enabling HTTP/2, should prioritize updating their software to mitigate this risk. The nature of the flaw makes it critical for system administrators to be proactive in applying the latest patches to safeguard against potential attacks.

May 6, 2026

CISA: Critical Infrastructure Must Master Isolation, Recovery

SecurityWeek

The Cybersecurity and Infrastructure Security Agency (CISA) has released guidance aimed at helping operators of critical infrastructure bolster their defenses against potential cyberattacks from foreign adversaries. This guidance stresses the importance of mastering isolation and recovery strategies to mitigate damage from attacks. Given the rising number of cyber threats targeting vital systems, this advice is particularly relevant for sectors like energy, transportation, and public health. By implementing these practices, organizations can better prepare for incidents, ensuring that they can maintain operations and recover swiftly after an attack. This proactive approach is essential for safeguarding national security and economic stability.

May 6, 2026

Sophisticated Quasar Linux RAT Targets Software Developers

SecurityWeek

A new remote access trojan (RAT) known as Quasar is targeting software developers, allowing attackers to gain unauthorized access to systems. This malware is particularly concerning because it can perform surveillance and exfiltrate credentials, putting sensitive information at risk. Developers who work with Linux systems are especially vulnerable to this sophisticated implant. The presence of such malware in the wild raises alarms about the security of development environments and the potential for broader attacks on software supply chains. Users and companies should take immediate steps to secure their systems against this threat, as the implications could affect many in the tech industry.

May 6, 2026

Websites with an undefined trust level: avoiding the trap

Securelist

The article discusses the growing issue of suspicious websites and how users can differentiate between safe and fraudulent sites. It provides insights into the types of untrusted sites that Kaspersky's solutions are now able to detect, backed by global statistics. This information is crucial for internet users, as falling victim to these fraudulent sites can lead to identity theft, financial loss, or malware infections. By understanding how to identify these threats, individuals can better protect themselves online. The article emphasizes the importance of being cautious while browsing and staying informed about the risks associated with untrusted websites.

May 6, 2026

Palo Alto Networks warns of firewall RCE zero-day exploited in attacks

BleepingComputer

Palo Alto Networks has issued a warning regarding a serious, unpatched vulnerability in the User-ID Authentication Portal of its PAN-OS. This flaw, categorized as a remote code execution (RCE) vulnerability, is currently being exploited in real-world attacks, putting users at significant risk. Organizations using affected versions of PAN-OS should be particularly vigilant as attackers may leverage this weakness to gain unauthorized access to systems. It's crucial for companies to assess their firewall configurations and implement necessary security measures to protect against potential breaches. The situation underscores the need for prompt action in addressing vulnerabilities as they arise.

May 6, 2026

Google's Android Apps Get Public Verification to Stop Supply Chain Attacks

The Hacker News

Google has introduced an initiative called Binary Transparency for Android to combat supply chain attacks. This public ledger ensures that the Google apps installed on devices are authentic and have not been tampered with. This move builds on the Pixel Binary Transparency feature that was launched in October 2021. The goal is to protect users by confirming that the applications they are using are exactly what Google intended to distribute. This is particularly important as supply chain attacks have become more common, posing risks to the integrity of software on mobile devices.

May 6, 2026