CISA Adds Four Known Exploited Vulnerabilities to Catalog
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
CISA has added four new vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog , based on evidence of active exploitation. CVE-2026-15409 SonicWall SMA1000 Appliances Server-Side Request Forgery Vulnerability CVE-2026-15410 SonicWall SMA1000 Appliances Code Injection Vulnerability CVE-2026-56155 Microsoft Active Directory Federation Services Insufficient Granularity of Access Control Vulnerability CVE-2026-56164 Microsoft SharePoint Server Missing Authentication for Critical Function Vulnerability These types of vulnerabilities are a frequent attack vector for malicious cyber actors and pose significant risks to the federal enterprise. Binding Operational Directive (BOD) 26-04: Prioritizing Security Updates Based on Risk establishes vulnerability management requirements for Federal Civilian Executive Branch (FCEB) agencies. BOD 26-04 reinforces the importance of the KEV Catalog and requires federal agencies to prioritize rapid remediation of high-risk vulnerabilities, specifically those identified by Common Vulnerabilities and Exposures (CVEs) listed in CISA’s KEV Catalog on publicly exposed assets that grant total control of the asset post-exploitation, while deferring action for lower-risk vulnerabilities. BOD 26-04 further establishes basic expectations for when agencies must check whether threat actors compromised the system before the patch was applied. While BOD 26-04 applies only to FCEB agencies, CISA encourages all organizations to adopt risk-based vulnerability management and prioritize remediation of KEV Catalog vulnerabilities . CISA will continue to add vulnerabilities to the catalog that meet the specified criteria . Aware of an exploited vulnerability not currently listed in the KEV Catalog? Submit it for potential addition through CISA’s KEV Nomination Form . Potential KEV additions must have a CVE ID, evidence of exploitation, and clear mitigation guidance.
CSIRTS triage
- What
- CISA has added multiple vulnerabilities to its Known Exploited Vulnerabilities Catalog, indicating active exploitation.
- Who is affected
- Federal agencies and users of affected Microsoft and SonicWall products are at risk.
- Urgency
- These vulnerabilities pose significant risks and require immediate attention from affected organizations.
- Action
- Affected organizations should prioritize applying security updates as per CISA recommendations.
AI-assisted analysis generated from the source advisory — verify against the original.
Details
Original advisory: https://www.cisa.gov/news-events/alerts/2026/07/14/cisa-adds-four-known-exploited-vulnerabilities-catalog
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Exploitation confirmedCVE-2026-15409Already exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 100% of all scored CVEs.
- Exploitation confirmedCVE-2026-15410Already exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 99% of all scored CVEs.
- Exploitation confirmedCVE-2026-56155Already exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 82% of all scored CVEs.
- Exploitation confirmedCVE-2026-56164Already exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 97% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-15409 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-15410 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-56155 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-56164 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- unknownexploitedSecurity Alert: [Updated] Microsoft Releases July 2026 Security Updatesjpcert
- criticalexploitedMicrosoft security advisory – July 2026 monthly rollup (AV26-698) – Update 3cccs
- criticalexploited2026-009: Critical Vulnerabilities in Microsoft SharePointcert-eu
- unknownexploitedNCSC-2026-0237 [1.02] [H/H] Vulnerabilities Fixed in Microsoft Officencsc-nl
- unknownexploitedNCSC-2026-0237 [1.01] [H/H] Vulnerabilities fixed in Microsoft Officencsc-nl
- criticalexploitedAL26-017 - Critical vulnerabilities impacting Microsoft SharePoint Server – CVE-2026-56164, CVE-2026-55040 and…cccs
- critical[NEW] [critical] SonicWall SMA: Multiple vulnerabilitiescert-bund
- unknownexploitedNCSC-2026-0239 [1.00] [H/H] Zero-Day vulnerabilities fixed in SonicWall SMA1000ncsc-nl
- unknownSonicWall SMA1000 Series Products Multiple Vulnerabilitieshkcert
- unknownMicrosoft Monthly Security Update (July 2026)hkcert
- unknownMultiple vulnerabilities in Microsoft products (July 15, 2026)cert-fr-avis
- unknownexploitedMultiple vulnerabilities in Sonicwall Secure Mobile Access 1000 (July 15, 2026)cert-fr-avis
Recent advisories for CISA Adds Four
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- highexploitedCISA Adds Four Known Exploited Vulnerabilities to Catalogcisa · 2026-07-21
- highexploitedCISA Adds Four Known Exploited Vulnerabilities to Catalogcisa · 2026-06-23
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