CISA Warns of F5 BIG-IP Vulnerability Actively Exploited in Attacks

CISA Warns of F5 BIG-IP Vulnerability Actively Exploited in Attacks

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added a newly disclosed vulnerability affecting F5 BIG-IP systems to its Known Exploited Vulnerabilities (KEV) catalog, warning that the flaw is being actively leveraged in real-world attacks. The vulnerability, tracked as CVE-2025-53521, was officially listed on March 27, 2026, with a remediation deadline of March 30, […] The post CISA Warns of F5 BIG-IP Vulnerability Actively…

Attackers are exploiting RCE vulnerability in BIG-IP APM systems (CVE-2025-53521)

A critical unauthenticated remote code execution vulnerability (CVE-2025-53521) in F5’s BIG-IP Access Policy Manager (APM) solution is under active exploitation, the US Cybersecurity and Infrastructure Security Agency warned on Friday. CISA added the flaw to its Known Exploited Vulnerabilities catalog after F5 updated the related security advisory, The advisory was initially published on October 15, 2025, when F5 confirmed a data breach that res…

CISA Adds CVE-2025-53521 to KEV After Active F5 BIG-IP APM Exploitation

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Friday added a critical security flaw impacting F5 BIG-IP Access Policy Manager (APM) to its Known Exploited Vulnerabilities (KEV) catalog, citing evidence of active exploitation. The vulnerability in question is CVE-2025-53521 (CVSS v4 score: 9.3), which could allow a threat actor to achieve remote code execution. "When a

CISA Adds One Known Exploited Vulnerability to Catalog

CISA Adds One Known Exploited Vulnerability to Catalog ggaylor Mar 27, 2026 Release DateMarch 27, 2026 DescriptionCISA has added one new vulnerability to its Known Exploited Vulnerabilities (KEV) Catalog, based on evidence of active exploitation.CVE-2025-53521 F5 BIG-IP Remote Code Execution VulnerabilityThis type of vulnerability is a frequent attack vector for malicious cyber actors and poses significant risks to the federal enterprise.Bindi…