CVE-2026-3356Disclosure

LOWCVSS 9.3 · CRITICAL

Exploitation ongoing with high activity in latest observed window (3 mentions)

Immediate actions

Prioritize remediation for affected systems immediately
Assume compromise if assets are exposed
Track advisory updates for patch or workaround availability

Recommended action window: Immediate (within 24h)

NVD description

The MS27102A Remote Spectrum Monitor is vulnerable to an authentication bypass that allows unauthorized users to access and manipulate its management interface. Because the device provides no mechanism to enable or configure authentication, the issue is inherent to its design rather than a deployment error.

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3.5/ 10 priority

Sources & remediation

Other references

https://www.cisa.gov/news-events/ics-advisories/icsa-26-090-01

Weakness type (CWE)

CWE-306

Priority

LOW

Exploitation

ACTIVE

PoC

NONE

Patch

NONE

Momentum

STABLE

Threat summary

Active exploitation appears in 1 classified signals
5 mentions across 2 observed days
Momentum state: stable

What's happening

Active exploitation reported across 1 signal
Technical details provided in 5 signals
Disclosure: 3 classified signals
General: 1 classified signal
Peaked at 3 mentions on most recent observed day (2026-04-01)
5 total mentions across 2 days

Deep dive

Activity timeline5 mentions / 2d

Signal classification3 categories

Disclosure

360.0%

General

120.0%

Active Exploitation

120.0%

Referenced assets5 URLs

By indicator

Classification over time

Date	Total	Labels

2026-03-31	2	Disclosure1General1
2026-04-01	3	Active Exploitation1Disclosure2

Full discourse5 posts

Aviatrix Threat Research Center@aviatrixtrc190d
Active Exploitation
TRC analysis shows attackers exploiting CVE-2026-3356 in Anritsu Remote Spectrum Monitors to bypass authentication and pivot laterally across networked infrastructure. Runtime segmentation helps contain post-compromise movement in critical measurement environments. #CriticalInfrastructure 🔗 Full breakdown: https://aviatrix.ai/threat-research-center/anritsu-remote-spectrum-monitor-2026-authentication-bypass
Post summary
Attackers are actively exploiting CVE‑2026‑3356 to bypass authentication on Anritsu Remote Spectrum Monitors and pivot laterally across networked infrastructure.
0001056
1.9K followersView on X
Infoflowcloud@infoflowcloud190d
Disclosure
🚨*CVE* CVE-2026-3356 The MS27102A Remote Spectrum Monitor is vulnerable to an authentication bypass that allows unauthorized users to access and manipulate its management interface. Because… https://www.cve.org/CVERecord?id=CVE-2026-3356 ----- Traducción: CVE-2026-3356 El … http://infoflow.cloud`
Post summary
CVE-2026-3356 has been disclosed as an authentication bypass in the MS27102A Remote Spectrum Monitor, but no PoC, exploit code, patch, or evidence of active exploitation is provided.
0000029
65 followersView on X
CVE@CVEnew190d
Disclosure
CVE-2026-3356 The MS27102A Remote Spectrum Monitor is vulnerable to an authentication bypass that allows unauthorized users to access and manipulate its management interface. Because… https://www.cve.org/CVERecord?id=CVE-2026-3356
Post summary
The text announces CVE‑2026‑3356, describing an authentication bypass in the MS27102A Remote Spectrum Monitor. No PoC, exploit, patch, or active exploitation details are provided.
00000207
56.9K followersView on X
CyberDudeBivash® | Global Cybersecurity Company@cyberbivash190d
General
🚨 CYBERDUDEBIVASH SENTINEL APEX ALERT 🚨 Threat: CVE-2026-3356 - Missing Authentication for Critical Function vulnerability in Anritsu Remote Spectrum Monitor Intel Report: https://ift.tt/CrX1vxZ
Post summary
The post identifies and briefly describes CVE-2026-3356 as a missing authentication flaw in Anritsu Remote Spectrum Monitor, but provides no PoC, exploit, patch, or evidence of active exploitation.
0000055
281 followersView on X
0day Signal@0dayPublishing190d
Disclosure
🚨 CVE-2026-3356: Missing Authentication for Critic... Critical spectrum monitoring gear with zero auth by design—perfect for RF surveillance hijacking and signal manipulation... https://zerodaysignal.com/vulnerability/CVE-2026-3356 #netsec #vulnerability #CVE #sysadmin #zeroday
Post summary
A new CVE (2026-3356) has been announced, highlighting missing authentication in critical spectrum monitoring gear, exposing it to potential RF surveillance hijacking and signal manipulation. A link is provided for further details.
0000068
194 followersView on X

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What researchers are saying

CVE-2026-3356

Aviatrix Threat Research Center[verified]@aviatrixtrcActive Exploitation

Attackers are actively exploiting CVE‑2026‑3356 to bypass authentication on Anritsu Remote Spectrum Monitors and pivot laterally across networked infrastructure.

Infoflowcloud@infoflowcloudDisclosure

CVE-2026-3356 has been disclosed as an authentication bypass in the MS27102A Remote Spectrum Monitor, but no PoC, exploit code, patch, or evidence of active exploitation is provided.

CVE@CVEnewDisclosure

The text announces CVE‑2026‑3356, describing an authentication bypass in the MS27102A Remote Spectrum Monitor. No PoC, exploit, patch, or active exploitation details are provided.

CyberDudeBivash® | Global Cybersecurity Company@cyberbivashGeneral

The post identifies and briefly describes CVE-2026-3356 as a missing authentication flaw in Anritsu Remote Spectrum Monitor, but provides no PoC, exploit, patch, or evidence of active exploitation.

0day Signal@0dayPublishingDisclosure

A new CVE (2026-3356) has been announced, highlighting missing authentication in critical spectrum monitoring gear, exposing it to potential RF surveillance hijacking and signal manipulation. A link is provided for further details.