CVE-2026-88227
A NVD · · CVE-2026-88227
Admiralty grading (A–F · 1–6)
Source reliability
- A Completely reliable
- B Usually reliable
- C Fairly reliable
- D Not usually reliable
- E Unreliable
- F Cannot be judged
Information credibility
- 1 Confirmed
- 2 Probably true
- 3 Possibly true
- 4 Doubtful
- 5 Improbable
- 6 Cannot be judged
NATO Admiralty (AJP-2.1) grades confidence, independent of the risk score. Cross-source corroboration isn't tracked for non-CVE news, so single-source items are capped at a lower credibility number; a low number does not imply low quality.
Key metrics
- CVSS
- 7.8
- EPSS
- 0%
Key insight
Pure patch information with no indication of active exploitation; the LSASS vulnerability allows local privilege escalation but requires existing local access.
Description
CVE-2026-88227 describes a heap-based buffer overflow in the Windows Local Security Authority Subsystem Service (LSASS). An attacker with existing local permissions can thereby elevate privileges on the affected system. The vulnerability affects Windows server and client systems; remote exploitation without prior authentication is not described. At the time of publication, there are no indications of active exploitation or a public exploit. The status corresponds to a regular patch entry without further threat narrative.
Risk score
- cvss base
- 78.00
- kev bonus
- 0.00
- epss bonus
- 0.00
- poc bonus
- 0.00
- raw before weight
- 78.00
- industry weight
- 1.21
- freshness factor
- 1.00
- exploitability factor
- 0.75
- days old
- 0.00
- vendor mismatch penalty
- 0.00
Path: operational
MITRE ATT&CK mapping
1 TTPProcedure details
| Technique | Tactic | Procedure | Conf. | Source |
|---|---|---|---|---|
| T1068 Exploitation for Privilege Escalation | Privilege Escalation | Exploits a heap-based buffer overflow in Windows LSASS to elevate privileges locally. | high | llm |