CVE-2026-70328Disclosure(microsoft / 365_apps)

LOWCVSS 6.5 · MEDIUM

Signal is active with 1 mentions in latest observed window

Immediate actions

Patch microsoft 365_apps systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

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

microsoft CVEs Back to dashboard

1.0/ 10 priority

Sources & remediation

Patch / fix

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70328

Weakness type (CWE)

CWE-125

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

365_apps
excel
microsoft_365
office_2019

Threat summary

Patch or workaround signal is available
2 mentions across 2 observed days
Momentum state: stable

What's happening

Patch or workaround mentioned in 1 signal
Technical details provided in 2 signals
Disclosure: 1 classified signal
Peaked 1d ago at 1 mentions (2026-08-11); latest day: 1
2 total mentions across 2 days

Affected systems

Vendors

microsoft

Products

365_appsexcelmicrosoft_365office_2019office_2021office_2024

2 versions affected across 6 products

Deep dive

Activity timeline2 mentions / 2d

Signal classification2 categories

Disclosure

150.0%

Patch

150.0%

Referenced assets2 URLs

By indicator

Classification over time

Date	Total	Labels

2026-08-11	1	Disclosure1
2026-08-15	1	Patch1

Full discourse2 posts

Hugo | DevOps | Cybersecurity 🇱🇻@HugoValters42d
Patch
CVE-2026-70328 - OOB read in Microsoft Excel. Info disclosure over network. CVSS 6.5. Patch under review - monitor updates closely. #CVE #Microsoft #infosec https://www.valtersit.com/cve/CVE-2026-70328/ #CVE #infosec #SysAdmin #cybersecurity #Linux #infosec #devsecops #devops #developer #sysadmin #100daysofcode #git #github #gitlab #redteam #blueteam #ethicalhacker #ethicalhacking #cybersecurityawareness #cybersecurity #cybersecuritynews #cybersecuritytips #python #hacker #linux #kali #ubuntu #debian #ukraine #spain #ireland #unitedkingdom #canada #finland #estonia #lithuania #ireland #hungary #denmark #norway #malta
Post summary
The tweet announces CVE-2026-70328, an out‑of‑band read vulnerability in Excel, and informs readers that a patch is under review and should be followed closely.
0000066
1.0K followersView on X
Vulmon Vulnerability Feed@VulmonFeeds46d
Disclosure
CVE-2026-70328 Information Disclosure Vulnerability in Microsoft Office Excel via Out-of-Bounds Read https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-70328
Post summary
The notice announces CVE‑2026‑70328 as an information‑disclosure vulnerability in Microsoft Office Excel caused by an out‑of‑bounds read, providing a link for additional details, but contains no PoC, exploit, or patch information.
0000085
4.1K followersView on X

CPE platform detail13 entries

Part:

Vendor:

Product:

Version:

Target SW:

Target HW:

13 of 13 entries

Part	Vendor	Product	Version	Target SW	Target HW
App	microsoft	365_apps	-	-	x64
App	microsoft	365_apps	-	-	x86
App	microsoft	excel	2016	-	x64
App	microsoft	excel	2016	-	x86
App	microsoft	microsoft_365	-	macos	-
App	microsoft	office_2019	-	-	x64
App	microsoft	office_2019	-	-	x86
App	microsoft	office_2021	-	-	x64
App	microsoft	office_2021	-	-	x86
App	microsoft	office_2021	-	macos	-
App	microsoft	office_2024	-	-	x64
App	microsoft	office_2024	-	-	x86
App	microsoft	office_2024	-	macos	-

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