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CVE-2026-68813: Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.

35
Routine
MEDIUM 5.5WATCHLISTMITIGATEMITIGATEMITIGATE

CVE-2026-68813 is a medium-severity flaw (CVSS 5.5) affecting 365 apps, microsoft 365, office 2019. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.

Why this priority

  • On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score5.5 (Medium)
Attack vectorLocal
Attack complexityLow
Privileges neededNone
User interactionRequired
EPSS exploit chance0.5% (top 55%)
CISA exploited listNo
WeaknessCWE-125
Published2026-08-11
Last modified2026-10-23
Publisher (CNA): Microsoft Corporation · Vendor: microsoft

Last updated 2026-10-23 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

microsoft 365 apps MITIGATE
Affected: all versions
Fixed in: no fixed release known
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy 365-apps || rpm -q 365-apps || 365-apps --version
No fixed or unaffected release known
Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.
microsoft microsoft 365 MITIGATE
Affected: all versions
Fixed in: no fixed release known
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy microsoft-365 || rpm -q microsoft-365 || microsoft-365 --version
No fixed or unaffected release known
Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.
microsoft office 2019 MITIGATE
Affected: all versions
Fixed in: no fixed release known
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy office-2019 || rpm -q office-2019 || office-2019 --version
No fixed or unaffected release known
Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.
microsoft office 2021 MITIGATE
Affected: all versions
Fixed in: no fixed release known
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy office-2021 || rpm -q office-2021 || office-2021 --version
No fixed or unaffected release known
Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.
microsoft office 2021 MITIGATE
Affected: all versions
Fixed in: no fixed release known
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy office-2021 || rpm -q office-2021 || office-2021 --version
No fixed or unaffected release known
Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.
microsoft office 2024 MITIGATE
Affected: all versions
Fixed in: no fixed release known
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy office-2024 || rpm -q office-2024 || office-2024 --version
No fixed or unaffected release known
Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.
Fedora ELN · selinux-policy · FIXED · 45.23-1.eln159 · FEDORA-2026-3668c969a2 · source
sudo dnf upgrade --advisory=FEDORA-2026-3668c969a2
Fedora 46 · sugar-toolkit-gtk3 · FIXED · 0.122-2.fc46 · FEDORA-2026-d11eb2faf0 · source
sudo dnf upgrade --advisory=FEDORA-2026-d11eb2faf0
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-68813?

365 apps: mitigate or apply the listed mitigation; microsoft 365: mitigate or apply the listed mitigation; office 2019: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-68813 being exploited?

CVE-2026-68813 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-68813 affect?

CVE-2026-68813 affects 365 apps, microsoft 365, office 2019. Severity is medium (CVSS 5.5). Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.

How urgent is CVE-2026-68813?

Priority 35/100. On your watchlist

Software pages

Microsoft Office vulnerabilities

Related CVEs

References

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