Microsoft
Exposure of sensitive system information to an unauthorized control sphere in Windows Win32K allows an authorized attacker to disclose information locally
At a glance
~0.5% estimated chance of attack in 30 days. Exploitation not confirmed.
Low rather than Medium: UK relevance is 40 of 100, little UK-specific signal so far.
Briefing
- Businesses should assess if Microsoft Office systems are updated to mitigate potential information disclosure risks.
Questions to ask IT
- Do we run Microsoft Office, and which versions?
- If it is not yet patched, what mitigation is in place, and will the fix be done by 13 Dec?
Next steps
- Confirm whether this affects systems or suppliers in your estate
Vulnerability facts
Full CVE detail CVE-2026-119856- 5.5 · MediumExploitable only with local access and a low-privilege account, and no one has to click or open anything. High impact on confidentiality.CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- Not listed
- ~0.5% estimated chance of attack in 30 days
- Not linked from the CVE record
- The vulnerability is linked to CVE-2026-119856 and involves exposure of sensitive system information.
Next steps
- Review the advisory against your asset inventory and patch cadence
Summary
- A vulnerability in Windows Win32K could allow an authorised attacker to locally disclose sensitive system information.
- Microsoft Office customers are advised to update to protected versions via Security Updates table.
Read the original reportMicrosoft Security Update Guide RSS(opens in a new tab)
Products and services involved
- Microsoft Office98% match confidence · CVE-2026-119856
Pulse
Last change 1h ago · Next recheck 14 Nov 2026, 23:12 UK time
- Story13 Nov 2026, 23:12 UK time · 1h ago
Linked reporting from Microsoft Security Update Guide RSS (vendor psirt).
Read source (Microsoft Security Update Guide RSS)
1 entry so far. The timeline chart appears once this story has more history.
Sources
CVE-2026-119856 Win32k Information Disclosure Vulnerability
How we know
Statements extracted from sources. Higher confidence means stronger corroboration.
- ClaimedHeadline60% confidence
Exposure of sensitive system information to an unauthorised control sphere in Windows Win32K allows an authorised attacker to disclose information locally
- ProbableSummary fact75% confidence
Added Microsoft Office software to the Security Updates table. Customers that are running supported version of Microsoft Office are encouraged to update to the indicated version to be protected from this vulnerability.
- ConfirmedCVE identifier95% confidence
Event involves CVE-2026-119856
- ConfirmedEstimated attack likelihood95% confidence
CVE-2026-119856 has an estimated ~0.5% chance of attack in 30 days (42.7th percentile) as of 2026-11-13 — probability signal, not confirmed exploitation