CISA Adds React Native Community CLI and SmarterMail Flaws to Known Exploited Vulnerabilities Catalog
CISA added two vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog based on evidence of active exploitation: CVE-2025-11953 (React Native Community CLI OS command injection) and CVE-2026-24423 (SmarterTools SmarterMail missing authentication for a critical function). Under BOD 22-01, Federal Civilian Executive Branch (FCEB) agencies are required to remediate newly listed KEV items by CISA’s specified due dates, and CISA urged non-federal organizations to similarly prioritize remediation as part of vulnerability management.
Separately, security practitioners highlighted ongoing challenges in using KEV as a universal “must-patch” list outside the federal context, given the volume of vulnerabilities and differing organizational risk profiles. Dark Reading reported on runZero’s KEV Collider, a tool that aggregates multiple open vulnerability frameworks to help teams triage exploited-vulnerability lists (including KEV) against their own priorities, alongside other approaches such as EPSS and “Likely Exploited Vulnerabilities” scoring; a former CISA KEV section chief cautioned that treating KEV as a blanket must-patch list for all organizations can waste limited remediation capacity.
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CISA adds two actively exploited flaws to the KEV Catalog
CISA added CVE-2025-11953 in React Native Community CLI and CVE-2026-24423 in SmarterTools SmarterMail to its Known Exploited Vulnerabilities Catalog based on evidence of active exploitation. CISA said Federal Civilian Executive Branch agencies must remediate the issues under BOD 22-01 by the specified deadlines and urged all organizations to prioritize patching.
runZero launches KEV Collider to enrich CISA KEV triage
runZero created KEV Collider, a tool that adds context such as CVSS, EPSS, and exploit commoditization signals to CISA's Known Exploited Vulnerabilities Catalog to help defenders prioritize remediation. The enriched data is also made available through a runZero-managed GitHub repository.
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CISA KEV Updates and New Enrichment Tooling for Vulnerability Prioritization
CISA’s **Known Exploited Vulnerabilities (KEV)** program continues to be used as an operational prioritization mechanism for vulnerabilities with confirmed exploitation, but recent analysis cautions it is often misunderstood as a definitive list of the “worst” vulnerabilities. A paper by former CISA KEV section chief Tod Beardsley describes how enrichment signals (e.g., **CVSS**, **EPSS**, **SSVC**, public exploit availability in *Metasploit*/*Nuclei*, and **MITRE ATT&CK** mappings) can be combined to better triage KEV entries, and introduces *KEV Collider*, a free web app/dataset intended to help teams explore and validate enriched KEV data; one highlighted finding is that only **~32%** of KEV-listed vulnerabilities are “immediately exploitable for initial access.” CISA also added two vulnerabilities to the KEV catalog due to **active exploitation**: **CVE-2026-24423** (SmarterTools *SmarterMail*) and **CVE-2025-11953** (*React Native Community CLI*). CVE-2026-24423 is described as an unauthenticated **RCE** tied to a missing authentication check in the `ConnectToHub` API method in SmarterMail builds prior to **9511**, enabling command execution by coercing the server to connect to a malicious HTTP endpoint; build **9511** was released to remediate, and ransomware activity has reportedly targeted exposed instances. CVE-2025-11953 is described as unauthenticated OS command injection via the Metro dev server (notably when bound to external interfaces), with reporting of exploitation activity involving PowerShell-based loaders and defense evasion; U.S. federal agencies are directed under **BOD 22-01** to remediate by the stated KEV deadline, and other organizations are advised to patch/upgrade and reduce exposure (e.g., bind Metro to localhost) while monitoring for suspicious PowerShell and related post-exploitation behavior.
Mar 21, 2026
CISA Adds Four Actively Exploited Vulnerabilities to the KEV Catalog
CISA added **four vulnerabilities** to its **Known Exploited Vulnerabilities (KEV) Catalog** based on evidence of active exploitation: **CVE-2008-0015** (Microsoft Windows Video ActiveX Control RCE), **CVE-2020-7796** (Synacor *Zimbra Collaboration Suite* SSRF, noted as relevant when the WebEx zimlet is installed and zimlet JSP is enabled), **CVE-2024-7694** (TeamT5 *ThreatSonar Anti-Ransomware* unrestricted file upload that can enable server-side command execution when an attacker has admin access to the platform), and **CVE-2026-2441** (Google Chromium CSS use-after-free). Under **BOD 22-01**, U.S. Federal Civilian Executive Branch (FCEB) agencies are required to remediate KEV-listed issues by CISA’s specified due dates, and CISA urged all organizations to prioritize remediation as part of vulnerability management. CISA’s public KEV data repository was updated to reflect the new catalog release (increasing the total count and adding entries including **CVE-2020-7796** and **CVE-2024-7694** with remediation guidance and metadata). Separately, industry commentary emphasized that KEV is best used as a prioritization input rather than a blanket “panic list,” recommending teams weigh exploitability context (e.g., required privileges/local access vs. remote control) and combine KEV with other signals such as **CVSS**, **EPSS**, and observed exploit tooling to drive patch sequencing.
Mar 21, 2026
CISA Adds Five Actively Exploited Vulnerabilities to the KEV Catalog
CISA added **five vulnerabilities** to its **Known Exploited Vulnerabilities (KEV) Catalog** based on evidence of **active exploitation**, reinforcing that these issues are being used as real-world attack vectors and should be prioritized for remediation. The newly listed CVEs are **CVE-2018-14634** (Linux kernel integer overflow / local privilege escalation), **CVE-2025-52691** (SmarterTools *SmarterMail* unrestricted file upload enabling RCE), **CVE-2026-21509** (Microsoft Office security feature bypass), **CVE-2026-23760** (SmarterTools *SmarterMail* authentication bypass via alternate path/channel), and **CVE-2026-24061** (GNU *InetUtils* argument injection). CISA reiterated that these vulnerability classes are frequently leveraged by threat actors and pose material risk to enterprise environments. Under **BOD 22-01**, U.S. Federal Civilian Executive Branch (FCEB) agencies are required to remediate KEV-listed vulnerabilities by CISA-specified due dates, and CISA urged all organizations to treat KEV entries as high-priority items in vulnerability management. Additional technical context highlighted that **CVE-2025-52691** can enable unauthenticated arbitrary file upload leading to **remote code execution** (noted as **CVSS 10.0** in the reporting) and that **CVE-2018-14634**, while older, remains relevant where legacy Linux kernels persist—underscoring that KEV additions can include long-standing flaws when exploitation is observed in the wild.
Mar 21, 2026