Affects Microsoft SharePoint, a widely deployed enterprise collaboration platform; SSRF enabling network privilege escalation could disrupt organizations and is broadly newsworthy.
CVE-2026-109502
Authenticated SSRF in Microsoft SharePoint enabling network privilege escalation.
Is CVE-2026-109502 being exploited?
Not confirmed. CVE-2026-109502 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.80% probability of exploitation in the next 30 days.
How severe is CVE-2026-109502?
CVE-2026-109502 is rated High with a CVSS score of 8.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-109502?
Yes. A fix has been recorded for CVE-2026-109502. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-109502 affect?
CVE-2026-109502 affects Microsoft Office SharePoint, Microsoft SharePoint Server. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-109502?
Apply Microsoft security update immediately
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated SSRF allows attackers to make internal requests, escalate privileges across the network, enabling lateral movement and data access.
Patch when possible
- affected>= 16.0.0 and < 16.0.20326.20278
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.
cisa ssvc
- exploitation
- none
- automatable
- no
- technical impact
- total
Assessed by CISA 10 Nov 2026 (SSVC 2.0.3).
timeline
- 10 Nov 2026Published
- 10 Nov 2026CISA SSVC assessment: exploitation none · same day later
- 11 Nov 2026CVE record last updated · 1 day later
- 12 Nov 2026Analysed by vulneraibility.com · 1 day later
- Patchmsrc.microsoft.com /update-guide/vulnerability/CVE-2026-109502
sources
- CVE List (CVE.org): description, affected versions, references; CVE Terms of Use
- NVD: CVSS and CPE data
- CISA Vulnrichment (ADP): SSVC decision points
- FIRST EPSS: exploit probability and percentile
- Summary, impact and triage tags: written by our AI analysis pipeline from the sources above. Check them against the sources.