CVEvulnerability

CVE-2026-20957

7.8 HIGH Published 2026-01-13 Modified 2026-06-17 Official page ↗
Status
Analyzed
Published
2026-01-13
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weaknesses
CWE-122, CWE-191

Description

Integer underflow (wrap or wraparound) in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

Affected configurations

• microsoft 365 apps • microsoft excel 2016 • microsoft office 2019 • microsoft office long term servicing channel 2021 • microsoft office long term servicing channel 2024 • microsoft office online server (< 16.0.10417.20083)

Related

Weakness · CWE (2)

  • CWE-122 Heap-based Buffer Overflow weakness
  • CWE-191 Integer Underflow (Wrap or Wraparound) weakness

References