Is CVE-2026-58617 actively exploited?

No active exploitation of CVE-2026-58617 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-58617 be exploited remotely?

Yes. CVE-2026-58617 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-58617?

CVE-2026-58617 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2026-58617

CRITICAL

CVE-2026-58617

CWE-284Published: July 14, 2026· Updated: Jul 16, 2026

9.8

CVSS v3.1

EPSS:0.67%probability of exploitation in 30 daysPercentile:47.8th

Official Description

Improper access control in Microsoft 365 Copilot for iOS allows an unauthorized attacker to elevate privileges over a network.

NVD Source

Risk Analysis

This critical improper access control vulnerability in Microsoft 365 Copilot for iOS allows an unauthorized attacker to elevate privileges over a network. The flaw enables attackers to gain higher access rights than intended. With a CVSS score of 9.8, this vulnerability poses a severe risk of unauthorized access and potential system compromise.

No public exploit is currently known for this vulnerability. Its remote exploitability and low attack complexity indicate a high potential for exploitation if an exploit becomes available.

Recommended Action

Update Microsoft 365 Copilot for iOS to the latest version that addresses this vulnerability. Implement strong network segmentation and access control policies.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2026-58617 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.