Type Vulnerability
Windows 0-day dropped by disgruntled researcher hands hackers System rights
1 source
At a glance
Low
30-day window, from the last update
Evidence-weighted, not popularity
Why Low
Low rather than Medium: UK relevance is 40 of 100, little UK-specific signal so far.
Briefing
- This vulnerability could allow attackers to execute arbitrary code with elevated privileges on Windows systems.
Next steps
- Confirm whether this affects systems or suppliers in your estate
- The 'SignDrop' exploit enables local users to achieve System-level privileges on affected systems.
Next steps
- Review the advisory against your asset inventory and patch cadence
Summary
- A Windows 0-day exploit called 'SignDrop' allows local users to gain System-level administrative rights.
Read the original reportArs Technica Security(opens in a new tab)
15 reports
Part of Multiple Windows and Citrix vulnerabilities disclosed
- Numeric truncation error in Windows SMB allows an authorized attacker to execute code over a network
- Heap-based buffer overflow in Windows Remote Desktop Services allows an authorized attacker to execute code over a network
- Heap-based buffer overflow in Windows Internet Connection Sharing (ICS) allows an authorized attacker to elevate privileges locally
- Heap-based buffer overflow in Windows Print Spooler Components allows an authorized attacker to elevate privileges locally
Pulse
Last change 2h ago · Next recheck 14 Nov 2026, 17:33 UK time
- Story13 Nov 2026, 17:33 UK time · 2h ago
Linked reporting from Ars Technica Security (independent original reporting).
Read source (Ars Technica Security)
1 entry so far. The timeline chart appears once this story has more history.
Sources
- Ars Technica SecurityNews
Windows 0-day dropped by disgruntled researcher hands hackers System rights
How we know
Statements extracted from sources. Higher confidence means stronger corroboration.
- ClaimedHeadline60% confidence
Windows 0-day dropped by disgruntled researcher hands hackers System rights
- ProbableSummary fact75% confidence
SignDrop exploit lets local users gain all-powerful System rights.