⚠ Actively exploited
Added to CISA KEV on 2025-06-30. Federal agencies required to patch by 2025-07-21. 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..
CVE-2025-6543 — Improper Restriction of Operations within the Bounds of a Memory Buffer in ADC
Severity
9.2CRITICALNVD
VulnCheck9.3
EPSS
2.3%
top 15.38%
CISA KEV
KEV
Added 2025-06-30
Due 2025-07-21
Exploit
No known exploits
Affected products
Timeline
PublishedJun 25
KEV addedJun 30
KEV dueJul 21
Latest updateMar 28
CISA 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.
Description
Memory overflow vulnerability leading to unintended control flow and Denial of Service in NetScaler ADC and NetScaler Gateway when configured as Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server
CVSS vector
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L
Affected Packages4 packages
🔴Vulnerability Details
3GHSA▶
GHSA-9gqr-6728-fpv3: Memory overflow vulnerability leading to unintended control flow and Denial of Service in NetScaler ADC and NetScaler Gateway when configured as Gatew↗2025-06-26
📋Vendor Advisories
1🕵️Threat Intelligence
12Hackernews
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Hackernews
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