Is CVE-2026-3389 actively exploited?

No active exploitation of CVE-2026-3389 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-3389 be exploited remotely?

No. CVE-2026-3389 requires local access to exploit.

What is the CVSS score of CVE-2026-3389?

CVE-2026-3389 has a CVSS score of 5.5 (MEDIUM).

HOME VULNERABILITIESCVE-2026-3389

MEDIUM

CVE-2026-3389

CWE-404Published: March 1, 2026· Updated: Mar 5, 2026

5.5

CVSS v3.1

EPSS:0.01%probability of exploitation in 30 daysPercentile:2.0th

Official Description

A vulnerability was determined in Squirrel up to 3.2. This vulnerability affects the function sqstd_rex_newnode in the library sqstdlib/sqstdrex.cpp. Executing a manipulation can lead to null pointer dereference. The attack can only be executed locally. The exploit has been publicly disclosed and may be utilized. The project was informed of the problem early through an issue report but has not responded yet.

NVD Source

Technical Analysis

CVE-2026-3389 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.5.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges Req.Low

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

squirrel-lang1 product

squirrel

Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

Exploit-DB

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

PacketStorm

Security advisories & exploits

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://github.com/albertodemichelis/squirrel/issues/314

ADVISORYhttps://vuldb.com/?id.348275

ADVISORYhttps://vuldb.com/?submit.761315

News & Research Mentioning CVE-2026-3389

Siemens Teamcenter

CISA Alerts· May 14, 2026

View CSAF Summary Siemens Teamcenter is affected by multiple vulnerabilities which could potentially lead to a compromise in availability, integrity and confidentiality. Siemens has released new versions for the affected products and recommends to update to the latest versions. The following versions of Siemens Teamcenter are affected: Teamcenter V2312 vers:intdot/<2312.0014, vers:intdot/<2312.0009 (CVE-2026-33862, CVE-2026-33893, CVE-2024-4367) Teamcenter V2406 vers:intdot/<2406.0012, vers:intdot/<2406.0006 (CVE-2026-33862, CVE-2026-33893, CVE-2024-4367) Teamcenter V2412 vers:intdot/<2412.0009 (CVE-2026-33862, CVE-2026-33893) Teamcenter V2506 vers:intdot/<2506.0005 (CVE-2026-33862, CVE-2026-33893) Teamcenter V2512 vers:all/* CVSS Vendor Equipment Vu [xlite_meta score:73 src:CISA Alerts xlite_fp:a7bb242287591fda8612b11c9044eb215c771058e6cd15528f7a2740e1131e36]

Siemens Industrial Edge Management

CISA Alerts· Apr 21, 2026

View CSAF Summary Industrial Edge Management contains an authorization bypass vulnerability that could be exploited by an unauthenticated remote attacker to circumvent authentication and to access connected Industrial Edge Devices through the remote connection feature. Siemens has released new versions for the affected products and recommends to update to the latest versions. The following versions of Siemens Industrial Edge Management are affected: Industrial Edge Management Pro V1 vers:intdot/>=1.7.6| =2.0.0| =2.2.0|<2.8.0 (CVE-2026-33892) CVSS Vendor Equipment Vulnerabilities v3 7.1 Siemens Siemens Industrial Edge Management Authentication Bypass by Primary Weakness Background Critical Infrastructure Sectors: Critical Manufacturing Countries/Areas [xlite_meta score:63 src:CISA Alerts xlite_fp:9e73e5e8f057790bad502aab00896aa81a43168ae04bc0a125366cd91b0fdea9]