CVE-2026-33109Disclosure(microsoft / azure_managed_instance_for_apache_cassandra)

HIGHCVSS 9.9 · CRITICAL

Exploitation observed; activity peaked at 3 mentions and remains active

Immediate actions

Patch microsoft azure_managed_instance_for_apache_cassandra systems immediately
Assume compromise if assets are exposed
Hunt for exploitation attempts and persistence artifacts
Increase monitoring for publicly documented tradecraft

Recommended action window: Immediate (within 24h)

NVD description

Improper access control in Azure Managed Instance for Apache Cassandra allows an authorized attacker to execute code over a network.

microsoft CVEs Back to dashboard

7.5/ 10 priority

Sources & remediation

Vendor / third-party advisories

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33109

Weakness type (CWE)

CWE-284

Priority

HIGH

Exploitation

ACTIVE

PoC

YES

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

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

azure_managed_instance_for_apache_cassandra

Threat summary

Active exploitation appears in 1 classified signals
Public PoC and exploit tooling are both present
Patch or workaround signal is available
11 mentions across 6 observed days

What's happening

Active exploitation reported across 1 signal
Exploit tool or code specified in 1 signal
PoC mentioned or linked in 1 signal
Patch or workaround mentioned in 2 signals
Technical details provided in 6 signals
Disclosure: 5 classified signals
General: 3 classified signals
Peaked 5d ago at 3 mentions (2026-05-08); latest day: 1
11 total mentions across 6 days

Affected systems

Vendors

microsoft

Products

azure_managed_instance_for_apache_cassandra

1 version affected across 1 product

Deep dive

Activity timeline11 mentions / 6d

Signal classification5 categories

Disclosure

545.5%

General

327.3%

Patch

19.1%

Active Exploitation

19.1%

Exploit

19.1%

Referenced assets7 URLs

By indicator

Classification over time

Date	Total	Labels

2026-05-08	3	Disclosure1General1Patch1
2026-05-09	1	Active Exploitation1
2026-05-10	2	Disclosure2
2026-05-12	2	Disclosure1Exploit1
2026-05-13	2	Disclosure1General1
2026-05-17	1	General1

Full discourse11 posts

VulDB 🛡@vuldb154d
Active Exploitation
A lot of offensive activities were identified targeting Microsoft Azure Managed Instance for Apache Cassandra (CVE-2026-33109) https://vuldb.com/vuln/361961/cti
Post summary
The statement reports that numerous offensive activities targeting CVE-2026-33109 have been identified, indicating the vulnerability is actively exploited in real-world attacks.
0203192
2.3K followersView on X
CVE@CVEnew152d
Disclosure
CVE-2026-33109 Improper access control in Azure Managed Instance for Apache Cassandra allows an authorized attacker to execute code over a network. https://www.cve.org/CVERecord?id=CVE-2026-33109
Post summary
The text announces the disclosure of CVE-2026-33109, detailing that improper access control in Azure Managed Instance for Apache Cassandra enables authorized attackers to run code over the network.
00020264
57.8K followersView on X
Upwind Security MDR@UpwindMDR155d
Disclosure
🚨 Improper Access Control in Azure Managed Instance for Apache Cassandra: CVE-2026-33109 #Azure #Microsoft #CVE https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33109
Post summary
Microsoft announces CVE-2026-33109, an improper access control flaw in Azure Managed Instance for Apache Cassandra, without providing details on exploitation, patches, or technical characteristics.
00020100
152 followersView on X
kawn@kawn2020150d
General
#windowsupdate #microsoft －なし：1 件・CVE-2026-32207　8.8　Azure Machine Learning －CVSS 基本値が 9.8 以上のもの：6 件・CVE-2026-33109　9.9　Azure Managed Instance for Apache Cassandra ・CVE-2026-41089　9.8　Windows Netlogon つづく…
Post summary
The post simply lists recent CVEs with their CVSS scores, providing no further detail or actionable information.
10000135
85 followersView on X
kawn@kawn2020150d
Disclosure
#windowsupdate #microsoft つづき・CVE-2026-33109　9.9　Azure Managed Instance for Apache Cassandra ・CVE-2026-33821　7.7　Microsoft Dynamics 365 Customer Insights ・CVE-2026-33823　9.6　Microsoft Teams ・CVE-2026-33844　9　　Azure Managed Instance for Apache Cassandra つづく…
Post summary
The tweet lists new Microsoft CVEs with associated severity scores, but provides no detailed technical information, exploitation evidence, or mitigation guidance.
1000090
85 followersView on X
Lyrie.ai@lyrie_ai151d
Disclosure
Unpopular opinion: The cybersecurity industry is selling you dashboards. CVE: CVE-2026-33109 CVSS: 9.9 (3.1) — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H Severity: CRITICAL Status: Critical advisory
Post summary
The post announces CVE‑2026‑33109, reporting a critical severity and CVSS score, but provides no evidence of a PoC, exploit, patch, or active exploitation.
1000027
210 followersView on X
Orizon@OrizonCyber155d
Patch
🚨 CVE-2026-33109 — CVSS 9.9/10 ██████████ Improper access control in Azure Managed Instance for Apache Cassandra allows an authorized attacker to execute code... Severity: CRITICAL Patch now. #cybersecurity #CVE https://t.co/DGIyeXhe3m
Post summary
The tweet announces CVE‑2026‑33109, a critical Azure Cassandra vulnerability with a high CVSS score; it confirms a patch is available but provides no exploit, PoC, or evidence of active exploitation.
1000090
29 followersView on X
IntegSec@integ_sec145d
General
CVE-2026-33109: Azure Managed Instance for Apache Cassandra Improper Access Control - What It Means for Your Business and How to Respond https://hubs.li/Q04gVnh30
Post summary
The provided text only contains a headline linking to a post about CVE-2026-33109, indicating an improper access control issue in Azure Managed Instance for Apache Cassandra, with no concrete details about PoC, exploits, active use, or remediation steps.
0000041
31 followersView on X
Lyrie.ai@lyrie_ai151d
Exploit
https://lyrie.ai/research/research/cve-2026-33109-advisory #lyrie #cybersecurity #CVE #threatintel #zerodayattack
Post summary
The advisory confirms CVE‑2026‑33109, supplies a PoC and functional exploit, details the technical nature of the flaw, and references official patches, but reports no evidence of active exploitation yet.
0000022
210 followersView on X
Infoflowcloud@infoflowcloud152d
Disclosure
🚨*CVE* CVE-2026-33109 Improper access control in Azure Managed Instance for Apache Cassandra allows an authorized attacker to execute code over a network. https://www.cve.org/CVERecord?id=CVE-2026-33109 ----- Traducción: CVE-2026-33109 Control de acceso inapropiado en Azure … http://infoflow.cloud`
Post summary
The tweet announces CVE-2026-33109, describing an improper access control flaw in Azure Managed Instance for Apache Cassandra that permits authorized attackers to execute code over the network.
0000021
76 followersView on X
Vulmon Vulnerability Feed@VulmonFeeds154d
General
CVE-2026-33109 Improper Access Control in Azure Managed Instance for Apache Cassandra https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-33109
Post summary
The text merely lists a CVE number and a generic vulnerability title with a link, providing no actionable details or evidence of exploitation.
0000065
4.0K 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	azure_managed_instance_for_apache_cassandra	-	-	-

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What researchers are saying

CVE-2026-33109

Upwind Security MDR[verified]@UpwindMDRDisclosure

Microsoft announces CVE-2026-33109, an improper access control flaw in Azure Managed Instance for Apache Cassandra, without providing details on exploitation, patches, or technical characteristics.

Lyrie.ai[verified]@lyrie_aiDisclosure

The post announces CVE‑2026‑33109, reporting a critical severity and CVSS score, but provides no evidence of a PoC, exploit, patch, or active exploitation.

Orizon[verified]@OrizonCyberPatch

The tweet announces CVE‑2026‑33109, a critical Azure Cassandra vulnerability with a high CVSS score; it confirms a patch is available but provides no exploit, PoC, or evidence of active exploitation.

IntegSec[verified]@integ_secGeneral

The provided text only contains a headline linking to a post about CVE-2026-33109, indicating an improper access control issue in Azure Managed Instance for Apache Cassandra, with no concrete details about PoC, exploits, active use, or remediation steps.

Lyrie.ai[verified]@lyrie_aiExploit

The advisory confirms CVE‑2026‑33109, supplies a PoC and functional exploit, details the technical nature of the flaw, and references official patches, but reports no evidence of active exploitation yet.

VulDB 🛡@vuldbActive Exploitation

The statement reports that numerous offensive activities targeting CVE-2026-33109 have been identified, indicating the vulnerability is actively exploited in real-world attacks.

CVE@CVEnewDisclosure

The text announces the disclosure of CVE-2026-33109, detailing that improper access control in Azure Managed Instance for Apache Cassandra enables authorized attackers to run code over the network.

kawn@kawn2020General

The post simply lists recent CVEs with their CVSS scores, providing no further detail or actionable information.