PT-2026-7361 · Microsoft · Office Excel

Quan Jin + 1 · Publicado 2026-02-10 · Atualizado 2026-03-10 · CVE-2026-21259

Positive Technologies (AI Summary)

CVSS v3.1

7.8

Alta

Vetor base

AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Microsoft Office Excel (affected versions not specified)

Description A heap-based buffer overflow exists in Microsoft Office Excel that could allow an unauthorized attacker to gain elevated privileges on a local system. This issue allows attackers to affect the system.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Memory Corruption

Heap Based Buffer Overflow

Enumeração de Fraquezas

CWE-787

CWE-122

Identificadores relacionados

BDU:2026-01782

CVE-2026-21259

Produtos afetados

Office Excel

Referências · 6

• https://osv.dev/vulnerability/CVE-2026-21259 · Aviso do Fabricante
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21259 · Aviso do Fabricante
• https://safe-surf.ru/specialists/bulletins-nkcki/729086 · Nota de Segurança
• https://bdu.fstec.ru/vul/2026-01782 · Nota de Segurança
• https://nvd.nist.gov/vuln/detail/CVE-2026-21259 · Nota de Segurança
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-21259 · Nota de Segurança