CVE-2025-62556
published 2025-12-09CVE-2025-62556: Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
PriorityP343high7.8CVSS 3.1
AVLACLPRNUIRSUCHIHAH
EPSS
0.53%
41.0th percentile
Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Affected
25 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | excel | — | — |
| microsoft | microsoft_365_apps_for_enterprise | >= 16.0.1 < https://aka.ms/OfficeSecurityReleases | https://aka.ms/OfficeSecurityReleases |
| microsoft | microsoft_excel_2016 | >= 16.0.0.0 < 16.0.5530.1000 | 16.0.5530.1000 |
| microsoft | microsoft_office_2019 | >= 19.0.0 < https://aka.ms/OfficeSecurityReleases | https://aka.ms/OfficeSecurityReleases |
| microsoft | microsoft_office_ltsc_2021 | >= 16.0.1 < https://aka.ms/OfficeSecurityReleases | https://aka.ms/OfficeSecurityReleases |
| microsoft | microsoft_office_ltsc_2024 | >= 16.0.0 < https://aka.ms/OfficeSecurityReleases | https://aka.ms/OfficeSecurityReleases |
| microsoft | microsoft_office_ltsc_for_mac_2021 | >= 16.0.1 < 16.104.25121423 | 16.104.25121423 |
| microsoft | microsoft_office_ltsc_for_mac_2024 | >= 16.0.0 < 16.104.25121423 | 16.104.25121423 |
| microsoft | office | — | — |
| microsoft | office_long_term_servicing_channel | — | — |
| microsoft | office_long_term_servicing_channel | — | — |
| microsoft | office_online_server | < 16.0.10417.20075 | 16.0.10417.20075 |
| microsoft | office_online_server | >= 16.0.0.0 < 16.0.10417.20075 | 16.0.10417.20075 |
| msrc | microsoft_365_apps_for_enterprise_for_32-bit_systems | — | — |
| msrc | microsoft_365_apps_for_enterprise_for_64-bit_systems | — | — |
| msrc | microsoft_excel_2016 | — | — |
| msrc | microsoft_office_2019_for_32-bit_editions | — | — |
| msrc | microsoft_office_2019_for_64-bit_editions | — | — |
| msrc | microsoft_office_ltsc_2021_for_32-bit_editions | — | — |
| msrc | microsoft_office_ltsc_2021_for_64-bit_editions | — | — |
| msrc | microsoft_office_ltsc_2024_for_32-bit_editions | — | — |
| msrc | microsoft_office_ltsc_2024_for_64-bit_editions | — | — |
| msrc | microsoft_office_ltsc_for_mac_2021 | — | — |
| msrc | microsoft_office_ltsc_for_mac_2024 | — | — |
| msrc | office_online_server | — | — |
CVSS provenance
nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
vendor_msrc7.8HIGH
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Microsoft
Microsoft Excel Remote Code Execution Vulnerability
vendor_msrc·2025-12-09·CVSS 7.8
CVE-2025-62556 [HIGH] CWE-822 Microsoft Excel Remote Code Execution Vulnerability
Microsoft Excel Remote Code Execution Vulnerability
Description: Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
FAQ: According to the CVSS metric, the attack vector is local (AV:L). Why does the CVE title indicate that this is a remote code execution?
The word Remote in the title refers to the location of the attacker. This type of exploit is sometimes referred to as Arbitrary Code Execution (ACE). The attack itself is carried out locally. This means an attacker or victim needs to execute code from the local machine to exploit the vulnerability.
FAQ: Is the Preview Pane an attack vector for this vulnerability?
No, the Preview Pane is not an attack vector.
FAQ: According to the CVSS metric, user interaction is required (U
GHSA
GHSA-9gwr-5p9w-wh2w: Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to execute code locally
ghsa_unreviewed·2025-12-09
CVE-2025-62556 [HIGH] CWE-822 GHSA-9gwr-5p9w-wh2w: Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to execute code locally
Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
No detection rules found.
No public exploits indexed.
Talos
Microsoft Patch Tuesday for December 2025 — Snort rules and prominent vulnerabilities
blogs_talos·2025-12-09·CVSS 8.8
[HIGH] Microsoft Patch Tuesday for December 2025 — Snort rules and prominent vulnerabilities
## Microsoft Patch Tuesday for December 2025 — Snort rules and prominent vulnerabilities
The Patch Tuesday for December of 2025 includes 57 vulnerabilities, including two that Microsoft marked as “critical.” The remaining vulnerabilities listed are classified as “important.” Microsoft assessed that exploitation of the two “critical” vulnerabilities is “less likely.”
CVE‑2025‑62562 is a Microsoft Outlook remote code execution vulnerability. Although it involves a use after free in Microsoft Office Outlook to allow an unauthorized attacker to execute code locally, an attacker would still need to send a malicious email and persuade the user to reply to it for the exploit to work.
CVE-2025-62553 , CVE-2025-62554 , CVE-2025-62556 and CVE-2025-62557 are Microsoft Office Remote Code Execution
Talos
Microsoft Patch Tuesday for December 2025 — Snort rules and prominent vulnerabilities
blogs_talos·2025-12-09·CVSS 8.8
[HIGH] Microsoft Patch Tuesday for December 2025 — Snort rules and prominent vulnerabilities
The Patch Tuesday for December of 2025 includes 57 vulnerabilities, including two that Microsoft marked as “critical.” The remaining vulnerabilities listed are classified as “important.” Microsoft assessed that exploitation of the two “critical” vulnerabilities is “less likely.”
CVE‑2025‑62562 is a Microsoft Outlook remote code execution vulnerability. Although it involves a use after free in Microsoft Office Outlook to allow an unauthorized attacker to execute code locally, an attacker would still need to send a malicious email and persuade the user to reply to it for the exploit to work.
CVE-2025-62553, CVE-2025-62554, CVE-2025-62556 and CVE-2025-62557 are Microsoft Office Remote Code Execution Vulnerability. An attacker can access resources using incompatible type ('type confusion') o
Bleepingcomputer
Microsoft December 2025 Patch Tuesday fixes 3 zero-days, 57 flaws
blogs_bleepingcomputer·2025-12-09·CVSS 7.8
[HIGH] Microsoft December 2025 Patch Tuesday fixes 3 zero-days, 57 flaws
## Microsoft December 2025 Patch Tuesday fixes 3 zero-days, 57 flaws
## Lawrence Abrams
28 Elevation of Privilege Vulnerabilities
19 Remote Code Execution Vulnerabilities
4 Information Disclosure Vulnerabilities
3 Denial of Service Vulnerabilities
2 Spoofing Vulnerabilities
When BleepingComputer reports on Patch Tuesday security updates, we only count those released by Microsoft today. Therefore, the number of flaws does not include Microsoft Edge (15 flaws) and Mariner vulnerabilities fixed earlier this month.
To learn more about the non-security updates released today, you can review our dedicated articles on the Windows 11 KB5072033 & KB5071417 cumulative updates .
If you're facing delays, blind spots, or prioritization issues with Patch Tuesday updates, our recent webinar with
Wiz
CVE-2025-62556 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz·CVSS 7.8
CVE-2025-62556 [HIGH] CVE-2025-62556 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2025-62556 :
vulnerability analysis and mitigation
Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Source : NVD
## 7.8
Score
Published December 9, 2025
Severity HIGH
CNA Score 7.8
Has Public Exploit No
Has CISA KEV Exploit No
CISA KEV Release Date N/A
CISA KEV Due Date N/A
Exploitation Probability Percentile (EPSS) 23.3
Exploitation Probability (EPSS) 0.1
Sources
NVD
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2025-12-09
Published