CVE-2026-62718
published 2026-08-11CVE-2026-62718: Integer underflow (wrap or wraparound) in Windows DHCP Server allows an unauthorized attacker to disclose information over an adjacent network.
PriorityP434medium6.5CVSS 3.1
AVAACLPRNUINSUCHINAN
EPSS
0.54%
45.0th percentile
Integer underflow (wrap or wraparound) in Windows DHCP Server allows an unauthorized attacker to disclose information over an adjacent network.
Affected
13 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | windows_10_1607 | < 10.0.14393.9418 | 10.0.14393.9418 |
| microsoft | windows_10_1809 | < 10.0.17763.9115 | 10.0.17763.9115 |
| microsoft | windows_server_2012 | — | — |
| microsoft | windows_server_2012 | >= 6.2.9200.0 < 6.2.9200.26280 | 6.2.9200.26280 |
| microsoft | windows_server_2012_r2 | >= 6.3.9600.0 < 6.3.9600.23338 | 6.3.9600.23338 |
| microsoft | windows_server_2016 | < 10.0.14393.9418 | 10.0.14393.9418 |
| microsoft | windows_server_2016 | >= 10.0.14393.0 < 10.0.14393.9418 | 10.0.14393.9418 |
| microsoft | windows_server_2019 | < 10.0.17763.9115 | 10.0.17763.9115 |
| microsoft | windows_server_2019 | >= 10.0.17763.0 < 10.0.17763.9121 | 10.0.17763.9121 |
| microsoft | windows_server_2022 | < 10.0.20348.5440 | 10.0.20348.5440 |
| microsoft | windows_server_2022 | >= 10.0.20348.0 < 10.0.20348.5499 | 10.0.20348.5499 |
| microsoft | windows_server_2025 | < 10.0.26100.33222 | 10.0.26100.33222 |
| microsoft | windows_server_2025 | >= 10.0.26100.0 < 10.0.26100.33296 | 10.0.26100.33296 |
CVSS provenance
nvdv3.16.5MEDIUMCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
ghsa9.3CRITICAL
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GHSA
Integer underflow (wrap or wraparound) in Windows DHCP Server allows an unauthorized attacker to disclose information over an adjacent network.
ghsa_unreviewed·2026-08-11
CVE-2026-62718 [MEDIUM] CWE-125 Integer underflow (wrap or wraparound) in Windows DHCP Server allows an unauthorized attacker to disclose information over an adjacent network.
Integer underflow (wrap or wraparound) in Windows DHCP Server allows an unauthorized attacker to disclose information over an adjacent network.
GHSA
axios's shouldBypassProxy does not recognize IPv4-mapped IPv6 addresses, allowing NO_PROXY bypass (incomplete fix for CVE-2025-62718)
ghsa·2026-05-29·CVSS 6.3
CVE-2026-44492 [MEDIUM] CWE-918 axios's shouldBypassProxy does not recognize IPv4-mapped IPv6 addresses, allowing NO_PROXY bypass (incomplete fix for CVE-2025-62718)
axios's shouldBypassProxy does not recognize IPv4-mapped IPv6 addresses, allowing NO_PROXY bypass (incomplete fix for CVE-2025-62718)
### Summary
shouldBypassProxy, introduced in v1.15.0 to fix CVE-2025-62718, does not normalise IPv4-mapped IPv6 addresses. When NO_PROXY lists an IPv4 address such as `127.0.0.1` or `169.254.169.254`, a request URL using the IPv4-mapped IPv6 form (`::ffff:7f00:1`, `::ffff:a9fe:a9fe`) still routes through the configured proxy. Node.js resolves these addresses to the underlying IPv4 host, so the request reaches the internal service via the proxy rather than being blocked.
### Details
lib/helpers/shouldBypassProxy.js (v1.15.0):
```javascript
const LOOPBACK_ADDRESSES = new Set(['localhost', '127.0.0.1', '::1']);
const isLoopback = (host) => LOOPBACK_ADDRESSES
No detection rules found.
No public exploits indexed.
Rapid7
Patch Tuesday - August 2026
blogs_rapid7·2026-08-11·CVSS 7.2
CVE-2026-68821 [HIGH] Patch Tuesday - August 2026
Microsoft is publishing 421 vulnerabilities on August 2026 Patch Tuesday , including 236 vulnerabilities in Windows. This is lower volume than last month’s record-breaking behemoth, but still one of the largest Patch Tuesday totals ever. There is no reason to suppose that Patch Tuesday will ever return to the lower volumes we saw prior to 2026. Microsoft is aware of exploitation in the wild for one of the vulnerabilities published today, as well as public disclosure for two others, although the Notable CVEs section of the Security Update Guide omits one of these. As usual, browser vulns are not included in the Patch Tuesday count above, but unusually, Microsoft does not appear to have published any desktop browser security patches so far this month.
## Summary charts
## Summary tables
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Tenable
Microsoft's August 2026 Patch Tuesday Addresses 398 CVEs (CVE-2026-68820)
blogs_tenable·2026-08-11·CVSS 7.0
CVE-2026-68820 [HIGH] Microsoft's August 2026 Patch Tuesday Addresses 398 CVEs (CVE-2026-68820)
## Microsoft's August 2026 Patch Tuesday Addresses 398 CVEs (CVE-2026-68820)
42 Critical
355 Important
1 Moderate
0 Low
Microsoft addresses 398 CVEs in the eighth Patch Tuesday of 2026, with three zero-days, including one that was exploited in the wild.
Microsoft patched 398 CVEs in its August 2026 Patch Tuesday release, with 42 rated critical, 355 rated as important and one rated as moderate. Our counts omitted two CVEs assigned by MITRE; CVE-2026-6726 and CVE-2026-6727.
This month’s update includes patches for:
.NET
.NET Core
.NET Framework
AMD Zen
Active Directory Certificate Services (AD CS)
Application Information Services
Azure Active Directory
Azure CycleCloud
Azure Monitor Agent
Azure Storage Explorer
Capability Access Management Service (camsvc)
Desktop Window M
Sans Isc
Microsoft Patch Tuesday August 2026, (Tue, Aug 11th)
blogs_sans_isc·2026-08-11·CVSS 7.8
CVE-2026-68820 [HIGH] Microsoft Patch Tuesday August 2026, (Tue, Aug 11th)
Microsoft Patch Tuesday August 2026
Published: 2026-08-11. Last Updated: 2026-08-11 17:54:49 UTC
by Renato Marinho (Version: 1)
0 comment(s)
This month we got patches for 418 vulnerabilities. Of these, 62 are critical, 1 is being exploited in the wild, and 2 were publicly disclosed as zero-days. Notable fixes include Windows privilege escalation, container tampering, and critical QUIC and DNS Server remote code execution bugs.
A few vulnerabilities worth mentioning:
Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability (CVE-2026-68820)
This Important-severity elevation of privilege vulnerability is listed by Microsoft as exploited in the wild but not publicly disclosed, and it has a CVSS score of 7.0. The flaw is a use-after-free issue in the Windows Ancil
Bugzilla
CVE-2026-42043 axios: Axios: NO_PROXY bypass via crafted URL
bugzilla·2026-04-24·CVSS 9.3
CVE-2026-42043 [CRITICAL] CVE-2026-42043 axios: Axios: NO_PROXY bypass via crafted URL
CVE-2026-42043 axios: Axios: NO_PROXY bypass via crafted URL
Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.1 and 0.31.1, an attacker who can influence the target URL of an Axios request can use any address in the 127.0.0.0/8 range (other than 127.0.0.1) to completely bypass the NO_PROXY protection. This vulnerability is due to an incomplete for CVE-2025-62718, This vulnerability is fixed in 1.15.1 and 0.31.1.
2026-08-11
Published