CVE-2025-6543

Known Exploited Vulnerability Entry External Catalog

Back to Catalog View Vulnerability
Entry Details

CVE-2025-6543

Confirmed

Yes

2025-06-30 00:00 UTC

Timestamps

2025-06-30

2025-06-30

Scope

KEV entry: Citrix NetScaler ADC and Gateway Buffer Overflow Vulnerability | Affected: Citrix / NetScaler ADC and Gateway | Description: Citrix NetScaler ADC and Gateway contain a buffer overflow vulnerability leading to unintended control flow and Denial of Service. NetScaler must be configured as Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server. | Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. | Due date: 2025-07-21 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX694788 ; https://www.netscaler.com/blog/news/netscaler-critical-security-updates-for-cve-2025-6543-and-cve-2025-5777/ ; https://nvd.nist.gov/vuln/detail/CVE-2025-6543

References
  • {'id': 'CVE-2025-6543', 'url': 'https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2025-6543'}

116d8d49-c0e5-4f69-bcea-4ac74c085a0a

405284c2-e461-4670-8979-7fd2c9755a60

2026-02-02 13:24 UTC

2026-02-06 07:53 UTC

Evidence (1)
Type Source Signal Confidence Details GCVE Metadata
vendor_report cisa-kev successful_exploitation 0.80
View details 
{
  "cwes": [
    "CWE-119"
  ],
  "date_added": "2025-06-30",
  "due_date": "2025-07-21",
  "feed": "CISA Known Exploited Vulnerabilities Catalog",
  "knownRansomwareCampaignUse": "Unknown",
  "product": "NetScaler ADC and Gateway",
  "vendorProject": "Citrix",
  "vulnerabilityName": "Citrix NetScaler ADC and Gateway Buffer Overflow Vulnerability"
}
 -
Export Options
JSON Object JSON API View Full Catalog