CVE-2026-56645Disclosure(microsoft / edge_chromium)

LOWCVSS 8.8 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

Patch microsoft edge_chromium systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

Heap-based buffer overflow in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.

microsoft CVEs Back to dashboard

0.5/ 10 priority

Sources & remediation

Vendor / third-party advisories

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56645

Weakness type (CWE)

CWE-122

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.

edge_chromium

Threat summary

Patch or workaround signal is available
5 mentions across 3 observed days
Momentum state: stable

What's happening

Patch or workaround mentioned in 2 signals
Technical details provided in 3 signals
Disclosure: 3 classified signals
General: 2 classified signals
Peaked 2d ago at 3 mentions (2026-07-04); latest day: 1
5 total mentions across 3 days

Affected systems

Vendors

microsoft

Products

edge_chromium

Deep dive

Activity timeline5 mentions / 3d

Signal classification2 categories

Disclosure

360.0%

General

240.0%

Referenced assets2 URLs

By indicator

Classification over time

Date	Total	Labels

2026-07-04	3	Disclosure2General1
2026-07-17	1	General1
2026-08-18	1	Disclosure1

Full discourse5 posts

ケイ | IT・セキュリティ系副業Webライター@Teeeda_worker78d
General
CVE-2026-56645 Microsoft Edge (Chromiumベース)の脆弱性をわかりやすく解説｜影響範囲と対策まとめ https://www.cybernote.click/2026/07/11/cve-2026-56645-microsoft-edge-chromium/ #IT #Security #cybersecurity
Post summary
The post merely references an article that promises a clear explanation of CVE‑2026‑56645 for Microsoft Edge, but it contains no direct evidence of a PoC, exploit, active usage, patch details, or technical specifics within the text itself.
0001038
207 followersView on X
connect24h@connect24h91d
Disclosure
企業端末のEdge更新量が悪夢でしかない。Chromium-based EdgeでRCEが7件並び、CVE-2026-56645、57975、57984、57988、58287、57974、57981が対象。heap overflow、type confusion、use after free、path traversal、integer overflowまで混ざるのは正直きつい。 CSIRT目線では、Intune、WSUS、Defender for EndpointでEdge versionと更新失敗端末を棚卸ししてほしい。ブラウザRCEはVPN内外を問わず入口になる。未更新端末を例外扱いで放置しない。#セキュリティ
Post summary
The post announces seven RCE-related CVEs affecting Chromium‑based Edge, details the exploit classes, and urges patching via corporate update tools to mitigate the risk.
10000418
4.2K followersView on X
Joey Romaine 🇺🇸 |=★=|@Tank23x046d
Disclosure
CVE-2026-56645 just dropped. High severity — worth your attention today. Heap-based buffer overflow in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code ov... Build like the next disruption is already in motion — because it is.
Post summary
A new CVE (CVE-2026-56645) has been disclosed, detailing a heap‑based buffer overflow in Microsoft Edge that could enable arbitrary code execution. No PoC, exploit code, patch, or evidence of active exploitation is provided.
0000044
353 followersView on X
ADK Cyber@ADKCyber90d
Disclosure
CVE-2026-56645 (CVSS 8.8) enables remote code execution in Microsoft Edge. Verify all endpoints are on the latest stable version. via NVD Recent High CVSS #CyberSecurity #InfoSec #Vulnerability https://t.co/iM3RzTq34F
Post summary
The tweet announces CVE-2026-56645, a high‑severity RCE in Microsoft Edge, and recommends keeping Edge at the latest stable version as a mitigation.
0000057
92 followersView on X
connect24h@connect24h91d
General
Edge大量CVE更新 🔗 ソース: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56645
Post summary
The tweet announces a large number of CVE updates for Microsoft Edge and provides a link to the MSRC page for CVE-2026-56645, without additional technical or exploit details.
00000150
4.2K followersView on X

CPE platform detail1 entries

Part:

Vendor:

Product:

Version:

Target SW:

Target HW:

1 of 1 entries

Part	Vendor	Product	Version	Target SW	Target HW
App	microsoft	edge_chromium	-	-	-

Explore more

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What researchers are saying

CVE-2026-56645

connect24h[verified]@connect24hDisclosure

The post announces seven RCE-related CVEs affecting Chromium‑based Edge, details the exploit classes, and urges patching via corporate update tools to mitigate the risk.

Joey Romaine 🇺🇸 |=★=|[verified]@Tank23x0Disclosure

A new CVE (CVE-2026-56645) has been disclosed, detailing a heap‑based buffer overflow in Microsoft Edge that could enable arbitrary code execution. No PoC, exploit code, patch, or evidence of active exploitation is provided.

ADK Cyber[verified]@ADKCyberDisclosure

The tweet announces CVE-2026-56645, a high‑severity RCE in Microsoft Edge, and recommends keeping Edge at the latest stable version as a mitigation.

connect24h[verified]@connect24hGeneral

The tweet announces a large number of CVE updates for Microsoft Edge and provides a link to the MSRC page for CVE-2026-56645, without additional technical or exploit details.

ケイ | IT・セキュリティ系副業Webライター@Teeeda_workerGeneral

The post merely references an article that promises a clear explanation of CVE‑2026‑56645 for Microsoft Edge, but it contains no direct evidence of a PoC, exploit, active usage, patch details, or technical specifics within the text itself.