CVE-2026-62870: Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.

Details

Source

NVD Recent CVEs (US · database · site)

Severity

high — CVSS 8.8

Published

2026-08-04

Last updated

2026-08-04

Exploitation

Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-62870

Referenced CVEs

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

• unknownVulnérabilité dans Microsoft Office (03 août 2026)cert-fr-avis
• highCVE-2026-62870: Microsoft Excel Remote Code Execution Vulnerabilitymsrc

Recent advisories for Use after free

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

• highCVE-2026-66315: Use after free in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute c…nvd · 2026-08-04
• mediumCVE-2026-20473: In display, there is a possible memory corruption due to use after free. This could lead to lo…nvd · 2026-08-03
• highCVE-2026-67300: FreeRDP before 3.29.0 contains client-side heap use-after-free vulnerabilities in the async up…nvd · 2026-08-01
• highCVE-2026-67299: FreeRDP before 3.29.0 contains a client-side heap use-after-free in the async update message p…nvd · 2026-08-01
• highCVE-2026-65981: Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.15.0, a server…nvd · 2026-07-31
• highCVE-2026-63035: A heap use-after-free vulnerability in the TransferSubscriptions service in open62541 may allo…nvd · 2026-07-30

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