CVE-2026-56181
published 2026-07-14CVE-2026-56181: Origin validation error in Windows Network Address Translation (NAT) allows an unauthorized attacker to perform spoofing over an adjacent network.
PriorityP347high8.3CVSS 3.1
AVAACHPRNUINSCCHIHAH
EPSS
0.28%
18.7th percentile
Origin validation error in Windows Network Address Translation (NAT) allows an unauthorized attacker to perform spoofing over an adjacent network.
Affected
8 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | windows_11_24h2 | < 10.0.26100.8875 | 10.0.26100.8875 |
| microsoft | windows_11_25h2 | < 10.0.26200.8875 | 10.0.26200.8875 |
| microsoft | windows_11_26h1 | < 10.0.28000.2525 | 10.0.28000.2525 |
| microsoft | windows_11_version_24h2 | >= 10.0.26100.0 < 10.0.26100.8875 | 10.0.26100.8875 |
| microsoft | windows_11_version_25h2 | >= 10.0.26200.0 < 10.0.26200.8875 | 10.0.26200.8875 |
| microsoft | windows_11_version_26h1 | >= 10.0.28000.0 < 10.0.28000.2525 | 10.0.28000.2525 |
| microsoft | windows_server_2025 | < 10.0.26100.33158 | 10.0.26100.33158 |
| microsoft | windows_server_2025 | >= 10.0.26100.0 < 10.0.26100.33158 | 10.0.26100.33158 |
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Hackernews
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blogs_hackernews·2026-08-10
CVE-2026-34348 ⚡ Weekly Recap: AI Goes Rogue, Metabase 0-Day, MCP Supply-Chain Attacks, and Router Backdoors
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## ⚡ Weekly Recap: AI Goes Rogue, Metabase 0-Day, MCP Supply-Chain Attacks, and Router Backdoors
A lot of security problems still begin with someone doing a completely normal thing. Cloning a repo. Answering a call. Leaving a box exposed. Trusting the default.
That pretty much covers the mood this week. Old bugs are back, supply chains are getting stranger, and some exploit paths are so short you wonder what was supposed to stop them in the first place.
That’s only part of it. Here’s everything else that made the Monday recap.
## ⚡ Threat of the Week
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Hackernews
New NatJack Attacks Hijack TCP Sessions and Spoof DNS by Manipulating NAT Tables
blogs_hackernews·2026-08-07·CVSS 8.3
CVE-2026-56181 [HIGH] New NatJack Attacks Hijack TCP Sessions and Spoof DNS by Manipulating NAT Tables
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## New NatJack Attacks Hijack TCP Sessions and Spoof DNS by Manipulating NAT Tables
Security researcher Malcolm Stagg has disclosed a new attack class called NatJack that manipulates network address translation (NAT) connection state to hijack active TCP sessions, spoof DNS responses, expose mapped ports, and exhaust NAT tables.
Presented at Black Hat USA 2026 , the research found affected behavior across independently developed implementations, including Windows and Linux.
Two implementation-specific flaws have been assigned CVEs: CVE-2026-56181 (CVSS score: 8.3) in Windows NAT used by Hyper-V, and CVE-2026-63913 (CVSS score:
Rapid7
Patch Tuesday - July 2026
blogs_rapid7·2026-07-14·CVSS 9.6
CVE-2026-58617 [CRITICAL] Patch Tuesday - July 2026
Microsoft is publishing 622 vulnerabilities on July 2026 Patch Tuesday , including a record-breaking 416 Windows vulnerabilities. Microsoft is aware of exploitation in the wild for two of the vulnerabilities published today, both of which are listed on CISA KEV, as well as public disclosure for one other. As usual, browser vulns are not included in the Patch Tuesday count above. Rapid7 noted last month that Microsoft no longer enumerates Chromium CVEs in the Security Update Guide. However, Microsoft has now taken the pursuit of minimalism much further, since today’s Security Update Guide no longer lists out even Microsoft vulnerabilities! Instead, we now receive a summary table of vulnerability counts by product family, as well as a new slimline “Notable CVEs” section. All of this only ser
Sans Isc
Microsoft Patch Tuesday July 2026 - The AI Acopolypse is Here , (Tue, Jul 14th)
blogs_sans_isc·2026-07-14·CVSS 6.1
CVE-2026-56155 [MEDIUM] Microsoft Patch Tuesday July 2026 - The AI Acopolypse is Here , (Tue, Jul 14th)
Microsoft Patch Tuesday July 2026 - The AI Acopolypse is Here
Published: 2026-07-14. Last Updated: 2026-07-14 19:14:58 UTC
by Johannes Ullrich (Version: 1)
0 comment(s)
This patch Tuesday includes a staggering 622 vulnerabilities, not including another 427 vulnerabilities in Chromium, affecting Microsoft's Edge browser. 62 of the vulnerabilities are rated critical. One was disclosed before today, and two have already been exploited.
Given the large number of vulnerabilities, it is difficult to point out "noteworthy" issues.
Already exploited vulnerabilities:
CVE-2026-56155 : Active Directory Federation Services Elevation of Privilege Vulnerability. This is an important (not critical) vulnerablity.
CVE-2026-56164: Microsoft SharePoint Server Elevation of Privilege Vulnerability. Micr
2026-07-14
Published