CVE-2026-45634: Windows DHCP Client Information Disclosure Vulnerability
Out-of-bounds read in Windows DHCP Server allows an authorized attacker to disclose information locally.
CSIRTS triage
- What
- Out-of-bounds read in Windows DHCP Server allows an authorized attacker to disclose information locally.
- Who is affected
- Users of Windows DHCP Server.
- Urgency
- Remediation is medium urgency due to the potential for information disclosure, though exploitation is not currently observed.
- Action
- Apply the latest security updates for Windows DHCP Server.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45634
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.
- Low exploitation riskCVE-2026-456340.36% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 30% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-45634 | coverage & exploitation status | NVD · CVE.org |
Recent advisories for Windows DHCP Client
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.
- mediumCVE-2026-65785: Uncontrolled resource consumption in Windows DHCP Client allows an unauthorized attacker to de…nvd · 2026-08-11
- highCVE-2026-62755: Stack-based buffer overflow in Windows DHCP Client allows an authorized attacker to elevate pr…nvd · 2026-08-11
- highCVE-2026-62736: Heap-based buffer overflow in Windows DHCP Client allows an authorized attacker to elevate pri…nvd · 2026-08-11
- highCVE-2026-61361: Use after free in Windows DHCP Client allows an authorized attacker to execute code locally.nvd · 2026-08-11
- mediumCVE-2026-65785: Windows DHCP Client Denial of Service Vulnerabilitymsrc · 2026-08-11
- highCVE-2026-62755: Windows DHCP Client Elevation of Privilege Vulnerabilitymsrc · 2026-08-11
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