Latest cybersecurity reporting from selected sources.

The threat group behind the attacks is also linked to a series of recently disclosed vulnerabilities in the vendor’s firewalls and SD-WAN systems. The post Cisco zero-day under ongoing attack by persistent threat group appeared first on CyberScoop.

'Firestarter' Backdoor Can Survive Reboots, Upgrades and Standard FixesThe Cybersecurity and Infrastructure Security Agency issued an emergency directive warning a newly-discovered Cisco backdoor can survive routine remediation processes, forcing agencies to investigate edge devices that anchor federal firewall and VPN security.

Cybersecurity agencies in the U.S. and U.K. are warning about a custom malware called Firestarter persisting on Cisco Firepower and Secure Firewall devices running Adaptive Security Appliance (ASA) or Firepower Threat Defense (FTD) software. [...]

Investigators found the malware, dubbed Firestarter, on a federal agency's network in a campaign dating back to at least September 2025. The post US, UK agencies warn hackers were hiding on Cisco firewalls long after patches were applied appeared first on CyberScoop.

The Cybersecurity and Infrastructure Security Agency (CISA) has ordered federal agencies to patch a maximum-severity vulnerability, CVE-2026-20131, in Cisco Secure Firewall Management Center (FMC) by Sunday, March 22. [...]

The ransomware gang, known for double-extortion attacks, had access to a critical Cisco firewall vulnerability weeks before it was publicly disclosed.

Notorious ransomware group Interlock has been exploiting a Cisco zero-day bug since January, AWS says

Cisco’s response to the latest SD-WAN and firewall defects has been fast, but the harder question is how long sophisticated actors had a head start — and what’s already compromised. The post Cisco’s latest vulnerability spree has a more troubling pattern underneath appeared first on CyberScoop.

AWS Researchers Find an Interlock Server Laden With ToolsRansomware hackers exploited a flaw with a maximum vulnerability score in Cisco firewall management software weeks before the networking giant disclosed the vulnerability in early March. The group has focused extensively on critical infrastructure sectors in North America and Europe.

Interlock's post-exploit toolkit exposed Ransomware criminals exploited CVE-2026-20131, a maximum-severity bug in Cisco Secure Firewall Management Center software, as a zero-day vulnerability more than a month before Cisco patched the hole, according to Amazon security boss CJ Moses.…

The Interlock ransomware gang has been exploiting a maximum severity remote code execution (RCE) vulnerability in Cisco's Secure Firewall Management Center (FMC) software in zero-day attacks since late January. [...]

Amazon Threat Intelligence is warning of an active Interlock ransomware campaign that's exploiting a recently disclosed critical security flaw in Cisco Secure Firewall Management Center (FMC) Software

Edge bugs are so fetch, and Cisco just patched 50 new ones, including some heavy hitters with 10 out of 10 scores on the CVSS scale.

Two of the 48 Cisco vulnerabilities, affecting Secure Firewall Management Center, are maximum-severity flaws

Cisco has released security updates to patch two maximum-severity vulnerabilities in its Secure Firewall Management Center (FMC) software. [...]

CISA Says Agencies Believed They Patched Cisco Flaws But Had NotThe U.S. cyber defense agency issued new patch guidance after discovering multiple federal agencies failed to properly secure Cisco firewalls, leaving federal networks exposed to exploitation by a suspected Chinese threat actor despite a prior emergency directive.

Cisco warned this week that two vulnerabilities, which have been exploited in zero-day attacks, are now being abused to force ASA and FTD firewalls into reboot loops. [...]

Plus 2 new critical vulns - patch now Cisco warned customers about another wave of attacks against its firewalls, which have been battered by intruders for at least six months. It also patched two critical bugs in its Unified Contact Center Express (UCCX) software that aren't under active exploitation - yet.…

Cisco on Wednesday disclosed that it became aware of a new attack variant that's designed to target devices running Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software releases that are susceptible to CVE-2025-20333 and CVE-2025-20362

Bill Cassidy letter asks if Switchzilla sat on critical flaws before feds were forced into emergency patching US Senator Bill Cassidy has fired off a pointed letter to Cisco over the firewall flaws that allegedly let hackers breach "at least one federal agency."…