Security Bulletin

Cisco is thrilled to announce the launch of the inaugural Cisco Customer Achievement Awards in the Asia Pacific, Japan, and Greater China (APJC) region! These awards celebrate and honor the remarkable achievements of our customers—organizations that...

The attack by the one of the most impactful RaaS groups active today demonstrates an evasion strategy that can stump defenses not equipped to detect cross-platform threats.

Learn how Cisco Firewalls and Splunk integration strengthens SOC visibility, improves compliance readiness, and empowers teams with actionable security insights.

I was intrigued when Johannes talked about malware that uses BASE64 over DNS to communicate. Take a DNS request like this: label1.label2.tld. Labels in a request like this can only be composed with letters (not case-sensitive), digits and a hyphen...

(c) SANS Internet Storm Center. https://isc.sans.edu Creative Commons Attribution-Noncommercial 3.0 United States License.

When I have a binary file to analyze, I often use tools like 010 Editor or format-bytes.py (a tool I develop). Sometimes I also use Kaitai Struct.

Microsoft initially fixed CVE-2025-59287 in the WSUS update mechanism in the October 2025 Patch Tuesday release, but the company has now issued a second, out-of-band update for the flaw, which is under attack in the wild.

Cyber teams need to get to work backfilling diminishing federal resources, according to Alexander Garcia-Tobar, who shares clear steps on a path forward for protecting enterprises with less CISA help.

Attackers are pouncing on financially strapped US government agencies and furloughed employees. And the effects of this period might be felt for a long time hereafter.

Identity doesn’t stay still. Trust shifts. Behavior fluctuates. Posture changes. Cisco Secure Access leverages rich data from identity, behaviors, and devices.

(c) SANS Internet Storm Center. https://isc.sans.edu Creative Commons Attribution-Noncommercial 3.0 United States License.

A $14 billion seizure by US investigators presents a warning for cybercriminals' reliance on bitcoin but is still a positive development for the cryptocurrency industry.