Microsoft — Windows Background Intelligent Transfer Service (BITS) Remote Code Execution Vulnerability
Patch Tuesday
An EPSS probability of 0.010, and Microsoft Exploitability Index: Exploitation More Likely.
Scheduled Maintenance
The priority band answers “how soon”, not “how bad” — see Methodology for what it weighs and where it abstains.
| Measure | Value | Source | What it means |
|---|---|---|---|
| CVSS base score | 8.8 | — | How severe the flaw is in itself. It does not say how likely an attack is. |
| FIRST EPSS | 0.010 (62.8th pctl) | FIRST | FIRST's estimate of the chance this is exploited in the next 30 days, and how that ranks against all CVEs. |
| Actively exploited | Not confirmed | Patch Tuesday | Whether a source of record has confirmed attacks using it in the wild. |
| Public exploit module | None known | Metasploit | Module existing is not the same as active exploitation. |
| EUVD cross-reference | Listed | ENISA EUVD | ENISA's own vulnerability database entry for this CVE, where one exists. |
Impacted software or hardware: Not identified by the connected sources
Remediation: NVD lists one or more references for this CVE that aren't tagged as a patch or vendor advisory. Review them directly to confirm patch availability and applicability before making a remediation decision.
Remediation basis: NVD reference (untagged)
ENISA EUVD also lists this CVE at CVSS 8.8 (v3.1), assigned by microsoft. Source: euvd.enisa.europa.eu.
1.02% as of 2026-10-16 (62.8th percentile). FIRST EPSS, recorded daily since this page started tracking it.
This page is an opinion about urgency. Where it and a source of record disagree, the source of record is the record.
Where this sits
CVE-2026-88159 is one of the entries ranked on the priority feed and in this month's Microsoft release.
