VulnHub

Real-time Cybersecurity News

Critical

Week in review: Cisco patches exploited email gateway 0-day, Revolut breach

Help Net Security
Actively Exploited
WindowsZero-dayMicrosoftCiscoVulnerabilityPatchData Breach

Overview

Last week, Revolut confirmed a data breach involving sensitive customer records. The breach occurred when an attacker impersonated a government agency, using an email address from that agency's domain to gain unauthorized access to the bank's systems. This incident raises significant concerns about the security of customer data and the effectiveness of identity verification processes in preventing such impersonation attacks. Meanwhile, Cisco released a patch for a zero-day vulnerability in its email gateway that had been actively exploited. This highlights ongoing challenges in cybersecurity, where organizations must remain vigilant against both social engineering tactics and technical vulnerabilities.

Key Takeaways

  • Active Exploitation: This vulnerability is being actively exploited by attackers. Immediate action is recommended.
  • Affected Systems: Revolut customer records, Cisco email gateway
  • Action Required: Cisco has released a patch for the exploited email gateway vulnerability.
  • Timeline: Disclosed on September 12, 2023

Original Article Summary

Here’s an overview of some of last week’s most interesting news, articles, interviews and videos: What we know about the Revolut data breach so far Someone impersonating a government agency, using an email address on that agency’s domain, obtained sensitive customer records from Revolut. The bank confirmed the incident on Saturday, September 12. DeepZero: Open-source hunting for vulnerable Windows drivers DeepZero is an open-source engine that automates the search for exploitable Windows kernel drivers. You … More → The post Week in review: Cisco patches exploited email gateway 0-day, Revolut breach appeared first on Help Net Security.

Impact

Revolut customer records, Cisco email gateway

Exploitation Status

This vulnerability is confirmed to be actively exploited by attackers in real-world attacks. Organizations should prioritize patching or implementing workarounds immediately.

Timeline

Disclosed on September 12, 2023

Remediation

Cisco has released a patch for the exploited email gateway vulnerability. Revolut should enhance its identity verification processes to prevent similar impersonation attacks.

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 Windows, Zero-day, Microsoft, and 4 more.

Read Original Article

Related Coverage

ShadowPad Malware Actively Exploits WSUS Vulnerability for Full System Access

The Hacker News

The ShadowPad malware is exploiting a recently patched vulnerability in Microsoft Windows Server Update Services (WSUS), identified as CVE-2025-59287, allowing attackers to gain full system access. This exploitation highlights the critical need for organizations to promptly apply security updates to vulnerable systems to prevent unauthorized access.

Nov 24, 2025

⚡ Weekly Recap: Fortinet Exploit, Chrome 0-Day, BadIIS Malware, Record DDoS, SaaS Breach & More

The Hacker News

This week, significant cybersecurity threats emerged as hackers exploited new 0-day vulnerabilities in Fortinet and Chrome, infiltrating supply chains and SaaS tools. The rapid response from major companies like Microsoft, Salesforce, and Google highlights the severity of these attacks and the ongoing challenges in securing trusted applications and software updates.

Nov 24, 2025

Microsoft Highlights Security Risks Introduced by New Agentic AI Feature

SecurityWeek

Microsoft has raised concerns about the security risks associated with its new Agentic AI feature, highlighting the potential for AI agents to engage in malicious activities like data exfiltration and malware installation if not properly secured. This underscores the critical need for robust security controls to mitigate these risks.

Nov 24, 2025

ToddyCat’s New Hacking Tools Steal Outlook Emails and Microsoft 365 Access Tokens

The Hacker News

ToddyCat, a threat actor, has developed a new tool called TCSectorCopy to steal Outlook emails and Microsoft 365 access tokens by exploiting the OAuth 2.0 authorization protocol through users' browsers. This poses a significant threat to corporate email security, as it allows unauthorized access to sensitive information outside the compromised infrastructure.

Nov 25, 2025

Microsoft: Security keys may prompt for PIN after recent updates

BleepingComputer

Microsoft has alerted users that FIDO2 security keys may require a PIN for sign-in following recent Windows updates since September 2025. This change could affect user experience and security practices, particularly for those relying on these security keys for authentication.

Nov 26, 2025

Microsoft to secure Entra ID sign-ins from script injection attacks

BleepingComputer

Microsoft is set to enhance the security of its Entra ID authentication system to protect against external script injection attacks starting in mid-to-late October 2026. This improvement aims to mitigate potential vulnerabilities that could be exploited by attackers to compromise user sign-ins.

Nov 26, 2025