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Description of the security update for Excel 2016: December 9, 2025 (KB5002820)

🗓️ 09 Dec 2025 08:00:00Reported by MicrosoftType 
mskb
 mskb🔗 support.microsoft.com👁 24 Views

Excel 2016 security update KB5002820 fixes remote code execution vulnerabilities.

Related
ReporterTitlePublishedViews
Family
ATTACKERKB		CVE-2025-62563
9 Dec 202517:55
–attackerkb
ATTACKERKB		CVE-2025-62553
9 Dec 202517:55
–attackerkb
BDU FSTEC		Vulnerability of Microsoft Excel, Microsoft Office, Microsoft 365 Apps for Enterprise, and Microsoft Office Online Server programs, related to unreliable pointer dereferencing, allowing attackers to execute arbitrary code.
10 Dec 202500:00
–bdu_fstec
BDU FSTEC		The vulnerability of Microsoft Office, Excel, and 365 Apps for Enterprise packages lies in their ability to exploit memory after it is freed, allowing an attacker to execute arbitrary code.
10 Dec 202500:00
–bdu_fstec
BDU FSTEC		The vulnerability of Microsoft Office, Excel, and 365 Apps for Enterprise packages relates to reading data beyond the buffer in memory, allowing an attacker to execute arbitrary code.
10 Dec 202500:00
–bdu_fstec
BDU FSTEC		Vulnerability of Microsoft Excel, Microsoft Office, Microsoft 365 Apps for Enterprise, and Microsoft Office Online Server programs, related to the use of memory after it is released, allowing an attacker to execute arbitrary code.
10 Dec 202500:00
–bdu_fstec
BDU FSTEC		The vulnerability of Microsoft Office, Excel, and 365 Apps for Enterprise packages lies in the unreliable reclamation of pointers, allowing an attacker to execute arbitrary code.
10 Dec 202500:00
–bdu_fstec
BDU FSTEC		Vulnerability of Microsoft Excel, Microsoft Office, Microsoft 365 Apps for Enterprise, and Microsoft Office Online Server programs, related to unreliable pointer dereferencing, allowing attackers to execute arbitrary code.
10 Dec 202500:00
–bdu_fstec
Circl		CVE-2025-62553
9 Dec 202517:29
–circl
Circl		CVE-2025-62556
9 Dec 202517:29
–circl
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09 Dec 2025 08:00Current
7High risk
Vulners AI Score7
CVSS 3.17.8
EPSS0.00664
SSVC
Excel 2016Security updateRemote code executionVulnerabilities
24