CVE-2020-13556

Opener vulnerability

CVSS

9.8

EPSS

4.5%

EPSS pct

91th

Exploited

No known

An out-of-bounds write vulnerability exists in the Ethernet/IP server functionality of EIP Stack Group OpENer 2.3 and development commit 8c73bf3. A specially crafted series of network requests can lead to remote code execution. An attacker can send a sequence of requests to trigger this vulnerability.

Affected vendor

Opener Project

Affected product

Opener

CVSS vector

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

Weakness type (CWE)

CWE-787 — Out-of-bounds Write

Published

2020-12-11

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 4.5% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 91% of all scored CVEs.

Check your external exposure to CVE-2020-13556

Confirm whether Opener Project Opener is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2020-13556.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2020-13556

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2020-13556 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

Run a free external exposure scan

Are you exposed to CVE-2020-13556?

Run an instant, non-intrusive external scan to check your attack surface for CVE-2020-13556.

Start free scan

No credit card. Agentless.

Related vulnerabilities

CRITICAL

CVE-2001-0609

Cfingerd vulnerability

CRITICAL

CVE-2001-0766

Http Server vulnerability

CRITICAL

CVE-2001-1496

Thttpd vulnerability