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Urgent: Cisco ASA Zero-Day Duo Under Attack; CISA Triggers Emergency Mitigation Directive

Urgent: Cisco ASA Zero-Day Duo Under Attack; CISA Triggers Emergency Mitigation Directive

Sep 25, 2025 Zero-Day / Vulnerability
Cisco is urging customers to patch two security flaws impacting the VPN web server of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software, which it said have been exploited in the wild. The zero-day vulnerabilities in question are listed below - CVE-2025-20333 (CVSS score: 9.9) - An improper validation of user-supplied input in HTTP(S) requests vulnerability that could allow an authenticated, remote attacker with valid VPN user credentials to execute arbitrary code as root on an affected device by sending crafted HTTP requests CVE-2025-20362 (CVSS score: 6.5) - An improper validation of user-supplied input in HTTP(S) requests vulnerability that could allow an unauthenticated, remote attacker to access restricted URL endpoints without authentication by sending crafted HTTP requests Cisco said it's aware of "attempted exploitation" of both vulnerabilities, but did not reveal who may be behind it, ...
State-Sponsored Hackers Exploit Two Cisco Zero-Day Vulnerabilities for Espionage

State-Sponsored Hackers Exploit Two Cisco Zero-Day Vulnerabilities for Espionage

Apr 25, 2024 Vulnerability / Zero-Day
A new malware campaign leveraged two zero-day flaws in Cisco networking gear to deliver custom malware and facilitate covert data collection on target environments. Cisco Talos, which dubbed the activity  ArcaneDoor , attributed it as the handiwork of a previously undocumented sophisticated state-sponsored actor it tracks under the name UAT4356 (aka Storm-1849 by Microsoft). "UAT4356 deployed two backdoors as components of this campaign, 'Line Runner' and 'Line Dancer,' which were used collectively to conduct malicious actions on-target, which included configuration modification, reconnaissance, network traffic capture/exfiltration and potentially lateral movement," Talos  said . The intrusions, which were first detected and confirmed in early January 2024, entail the exploitation of  two vulnerabilities  - CVE-2024-20353  (CVSS score: 8.6) - Cisco Adaptive Security Appliance and Firepower Threat Defense Software Web Services Denial-of-Service Vulner...
Cisco Warns of Exploitation of Decade-Old ASA WebVPN Vulnerability

Cisco Warns of Exploitation of Decade-Old ASA WebVPN Vulnerability

Dec 03, 2024 Vulnerability / Network Security
Cisco on Monday updated an advisory to warn customers of active exploitation of a decade-old security flaw impacting its Adaptive Security Appliance (ASA). The vulnerability, tracked as CVE-2014-2120 (CVSS score: 4.3), concerns a case of insufficient input validation in ASA's WebVPN login page that could allow an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a targeted user of the appliance. "An attacker could exploit this vulnerability by convincing a user to access a malicious link," Cisco noted in an alert released in March 2014. As of December 2, 2024, the networking equipment major has revised its bulletin to note that it has become aware of "additional attempted exploitation" of the vulnerability in the wild. The development comes shortly after cybersecurity firm CloudSEK revealed that the threat actors behind AndroxGh0st are leveraging an extensive list of security vulnerabilities in various internet-faci...
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CISO Board Reports: Crush It

websiteXM CyberSecure Budget / CISO
Transform how you report cyber risk to the board. Get real-world skills now.
cyber security

2025 Pentest Report: How Attackers Break In

websiteVonahi SecurityNetwork Security / Pentesting
Discover real exploitable vulnerabilities and defense gaps in our free Cybersecurity Awareness Month report.
CISA Warning: Akira Ransomware Exploiting Cisco ASA/FTD Vulnerability

CISA Warning: Akira Ransomware Exploiting Cisco ASA/FTD Vulnerability

Feb 16, 2024 Ransomware / Vulnerability
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Thursday  added  a now-patched security flaw impacting Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) software to its Known Exploited Vulnerabilities ( KEV ) catalog, following reports that it's being likely exploited in Akira ransomware attacks. The vulnerability in question is  CVE-2020-3259  (CVSS score: 7.5), a high-severity information disclosure issue that could allow an attacker to retrieve memory contents on an affected device. It was  patched  by Cisco as part of updates released in May 2020. Late last month, cybersecurity firm Truesec said it found evidence suggesting that it has been weaponized by Akira ransomware actors to compromise multiple susceptible Cisco Anyconnect SSL VPN appliances over the past year. "There is no publicly available exploit code for [...] CVE-2020-3259, meaning that a threat actor, such as Akira, exploiting that vulnerabi...
Why We Must Democratize Cybersecurity

Why We Must Democratize Cybersecurity

Feb 16, 2024 SecOps / Threat Intelligence
With breaches making the headlines on an almost weekly basis, the cybersecurity challenges we face are becoming visible not only to large enterprises, who have built security capabilities over the years, but also to small to medium businesses and the broader public. While this is creating greater awareness among smaller businesses of the need to improve their security posture, SMBs are often left facing a gap in the market, unable to find security tooling that is both easy for them to use and which they can afford. When we consider the needs of SMBs, we need to focus both on the development of threat intelligence, which is necessary to understand and identify the threats being faced, as well  as the tools used to provide protection . NTTSH has built a pedigree of over 20 years' experience in the research and curation of threat intelligence as well as the development of capabilities and products which leverage its threat intelligence to protect customers. After many years of focus...
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