
Microsoft shows weight edits can hide backdoors in AI agents
Changing fewer than 10 dormant neurons can make a triggered agent run attacker code; Microsoft has not seen this used.
520 stories, newest first · one card per story

Changing fewer than 10 dormant neurons can make a triggered agent run attacker code; Microsoft has not seen this used.

Both Important-rated flaws need low privileges; the record does not show an active exploitation campaign.

Opening a crafted Outlook message can leak an NTLMv2 hash via CVE-2026-124194; a separate Windows Search RCE is not reported as exploited.

The update reaches build 19045.7846, or 19044.7846 on Enterprise LTSC 2021, and includes November Patch Tuesday fixes.

CVE-2026-124194 can leak NTLMv2 hashes from Microsoft 365 Apps and Office LTSC 2021 and 2024 after one opened message file.

CVE-2026-124194 can leak an NTLMv2 hash if a user opens a crafted Outlook file; ZDI flags 30 wormable bugs.

Opening a crafted message can leak an NTLMv2 hash without Outlook’s usual warning.

CISA added Outlook spoofing flaw CVE-2026-124194 to KEV and set a November 24, 2026 patch deadline.

Only CVE-2026-124194, a moderate Outlook spoofing bug, is marked exploited; builds and fixes are not listed.

Opening a crafted message can leak an NTLMv2 hash without the usual external-content warning; it is not zero-click.

Attackers already use CVE-2026-124194, CVSS 6.5, which leaks an NTLMv2 hash after a user opens a malicious Office file.

Only CVE-2026-124194, an Outlook spoofing bug scored 6.5, is exploited; 48 of 64 critical issues are remote code execution.
CVE-2026-124194 can leak an Outlook user’s NTLMv2 hash; two zero-click remote code execution bugs also ship.

The release covers 1,093 flaws, 63 rated critical, plus Exchange, SharePoint, Windows Search, and LDAP bugs.

The excerpt lists 57 CVEs, including CVSS 9.8 remote code execution bugs rated exploitation less likely.

The visible Rapid7 list includes several 9.8 remote code execution bugs; each entry is marked not publicly disclosed.

CISA added the exploited Outlook spoofing bug to KEV; a Windows Search flaw is called zero-click code execution.
CISA ordered agencies to patch exploited Outlook, Barracuda and other bugs, with Outlook due by month’s end.
SANS says 68 issues are critical and CVE-2026-124194, an Outlook spoofing bug, is already exploited.

Opening a crafted Outlook message can leak an NTLMv2 hash to an attacker-controlled share.

CVE-2026-124194 is the only listed flaw marked exploited; it is a Moderate CVSS 6.5 spoofing bug.

Opening a crafted file can leak an NTLMv2 hash; the Preview Pane is not an attack vector.

Outlook spoofing CVE-2026-124194, used as a zero-day, leaks NTLMv2 hashes when a crafted Office file is opened.

The mandatory packages cover hundreds of previously found flaws plus File Explorer, AutoPlay, Magnifier, and taskbar changes.
Today 1.5K readers · 2.4K views · 753 reads · all time 189K views