HOMEVULNERABILITIESCVE-2021-27408
HIGH

CVE-2021-27408

CWE-125Published: June 11, 2021· Updated: Jun 17, 2026

7.5
CVSS v3.1

Official Description

The affected product is vulnerable to an out-of-bounds read, which can cause information leakage leading to arbitrary code execution if chained to the out-of-bounds write vulnerability on the Welch Allyn medical device management tools (Welch Allyn Service Tool: versions prior to v1.10, Welch Allyn Connex Device Integration Suite – Network Connectivity Engine (NCE): versions prior to v5.3, Welch Allyn Software Development Kit (SDK): versions prior to v3.2, Welch Allyn Connex Central Station (CS): versions prior to v1.8.6, Welch Allyn Service Monitor: versions prior to v1.7.0.0, Welch Allyn Connex Vital Signs Monitor (CVSM): versions prior to v2.43.02, Welch Allyn Connex Integrated Wall System (CIWS): versions prior to v2.43.02, Welch Allyn Connex Spot Monitor (CSM): versions prior to v1.52, Welch Allyn Spot Vital Signs 4400 Device (Spot 4400) / Welch Allyn Spot 4400 Vital Signs Extended Care Device: versions prior to v1.11.00).

NVD Source

Technical Analysis

CVE-2021-27408 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected Vendors & Products

hillrom9 product(s)
connex central stationconnex device integration suite network connectivity engineconnex integrated wall systemconnex spot monitorconnex vital signs monitorservice monitorservice toolsoftware development kitspot vital signs 4400
Source: NVD CPE · 9 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
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://us-cert.cisa.gov/ics/advisories/icsma-21-152-01
ADVISORYhttps://us-cert.cisa.gov/ics/advisories/icsma-21-152-01

All References (2)

→
https://us-cert.cisa.gov/ics/advisories/icsma-21-152-01Mitigation · Third Party Advisory · US Government Resource
→
https://us-cert.cisa.gov/ics/advisories/icsma-21-152-01Mitigation · Third Party Advisory · US Government Resource

Quick Facts

CVE IDCVE-2021-27408
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-125
CISA KEVNo
Affected1 vendor(s)
PublishedJun 11, 2021

Related CVEs (CWE-125)

CVE-2021-41556
10.0
CVE-2013-0767
10.0
CVE-2009-2523
10.0
CVE-2021-21777
10.0
CVE-2017-14451
10.0
CVE-2026-24826
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-27408 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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