PT-2021-6389 · Microsoft · Office Excel+2

Shilongan · Published 2021-12-14 · Updated 2026-05-19 · CVE-2021-43256

Positive Technologies (AI Summary)

CVSS v2.0

9.3

High

Base vector

AV:N/AC:M/Au:N/C:C/I:C/A:C

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

Description The issue is related to incorrect code generation management in Microsoft Office, Microsoft Excel, and Microsoft 365 packages. This allows a remote attacker to execute arbitrary code.

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

Code Injection

Weakness Enumeration

CWE-94

Related Identifiers

BDU:2022-01436

CVE-2021-43256

Affected Products

365

Office Excel

Office

References · 11

• https://safe-surf.ru/specialists/bulletins-nkcki/673061 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-43256 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-43256 · Security Note
• https://bdu.fstec.ru/vul/2022-01436 · Security Note
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43256 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-43256 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-43256 · Vendor Advisory
• https://cybersecurity-help.cz/vdb/SB2021121447 · Note
• https://t.me/cibsecurity/34022 · Telegram Post
• https://t.me/cveNotify/164086 · Telegram Post
• https://twitter.com/f1tym1/status/2056823282242871341 · Twitter Post