CVE-2026-68805
published 2026-08-11CVE-2026-68805: Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
PriorityP347high7.8CVSS 3.1
AVLACLPRNUIRSUCHIHAH
EPSS
0.33%
25.3th percentile
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Affected
10 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 < 16.0.5565.1001 | 16.0.5565.1001 |
| microsoft | microsoft_office_2019 | >= 19.0.0 < https://aka.ms/OfficeSecurityReleases | https://aka.ms/OfficeSecurityReleases |
| microsoft | microsoft_office_365_for_mac | >= 1.0.0 < 16.112.26081010 | 16.112.26081010 |
| 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 < 16.112.26081010 | 16.112.26081010 |
| microsoft | microsoft_office_ltsc_for_mac_2024 | >= 16.0.0 < 16.112.26081010 | 16.112.26081010 |
| microsoft | office_online_server | >= 16.0.0.0 < 16.0.10417.20175 | 16.0.10417.20175 |
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VulDB
Microsoft Office up to LTSC for Mac 2024 buffer overflow (EUVD-2026-56759 / Nessus ID 334691)
vuldb·2026-08-16·CVSS 7.8
CVE-2026-68805 [HIGH] Microsoft Office up to LTSC for Mac 2024 buffer overflow (EUVD-2026-56759 / Nessus ID 334691)
A vulnerability classified as problematic was found in Microsoft Office up to LTSC for Mac 2024. The impacted element is an unknown function. Executing a manipulation can lead to buffer overflow.
This vulnerability is registered as CVE-2026-68805. The attack needs to be launched locally. No exploit is available.
It is advisable to implement a patch to correct this issue.
GHSA
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
ghsa_unreviewed·2026-08-11
CVE-2026-68805 [HIGH] CWE-122 Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
No detection rules found.
No public exploits indexed.
Rapid7
Patch Tuesday - August 2026
blogs_rapid7·2026-08-11·CVSS 7.2
CVE-2026-68821 [HIGH] Patch Tuesday - August 2026
Microsoft is publishing 421 vulnerabilities on August 2026 Patch Tuesday , including 236 vulnerabilities in Windows. This is lower volume than last month’s record-breaking behemoth, but still one of the largest Patch Tuesday totals ever. There is no reason to suppose that Patch Tuesday will ever return to the lower volumes we saw prior to 2026. Microsoft is aware of exploitation in the wild for one of the vulnerabilities published today, as well as public disclosure for two others, although the Notable CVEs section of the Security Update Guide omits one of these. As usual, browser vulns are not included in the Patch Tuesday count above, but unusually, Microsoft does not appear to have published any desktop browser security patches so far this month.
## Summary charts
## Summary tables
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Sans Isc
Microsoft Patch Tuesday August 2026, (Tue, Aug 11th)
blogs_sans_isc·2026-08-11·CVSS 7.8
CVE-2026-68820 [HIGH] Microsoft Patch Tuesday August 2026, (Tue, Aug 11th)
Microsoft Patch Tuesday August 2026
Published: 2026-08-11. Last Updated: 2026-08-11 17:54:49 UTC
by Renato Marinho (Version: 1)
0 comment(s)
This month we got patches for 418 vulnerabilities. Of these, 62 are critical, 1 is being exploited in the wild, and 2 were publicly disclosed as zero-days. Notable fixes include Windows privilege escalation, container tampering, and critical QUIC and DNS Server remote code execution bugs.
A few vulnerabilities worth mentioning:
Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability (CVE-2026-68820)
This Important-severity elevation of privilege vulnerability is listed by Microsoft as exploited in the wild but not publicly disclosed, and it has a CVSS score of 7.0. The flaw is a use-after-free issue in the Windows Ancil
Wiz
CVE-2025-68805 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz·CVSS 5.3
CVE-2025-68805 [MEDIUM] CVE-2025-68805 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2025-68805 :
Linux Debian vulnerability analysis and mitigation
In the Linux kernel, the following vulnerability has been resolved:
fuse: fix io-uring list corruption for terminated non-committed requests
When a request is terminated before it has been committed, the request
is not removed from the queue's list. This leaves a dangling list entry
that leads to list corruption and use-after-free issues.
Remove the request from the queue's list for terminated non-committed
requests.
Source : NVD
Published January 13, 2026
CNA Score N/A
Affected Technologies
Linux Debian
Linux Ubuntu
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) 7.7
Exploitation Probability (EPSS) N/A
Affected pa
2026-08-11
Published