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No exploitation reportedFix available

CVE-2021-27408

No exploitation reported by the sources we read.

  • Published2021-06-11
  • Fixed in1.8.6
  • WeaknessCWE-125

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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).

Timeline

dates in UTC
  1. 2021-06-1117:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-27408?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-27408?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Hillrom connex central station
BranchAffectedFixed in
1.8< 1.8.61.8.6
Hillrom connex device integration suite network connectivity engine
BranchAffectedFixed in
5.3< 5.35.3
Hillrom connex integrated wall system
BranchAffectedFixed in
2.43< 2.43.022.43.02

6 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • ICSMA-21-152-01 CISA9 known affected

    Hillrom Medical Device Management (Update B)

    Welch Allyn Connex Spot Monitor (CSM): versions prior to v1.52 · Welch Allyn Connex Integrated Wall System (CIWS): versions prior to v2.43.02 · Welch Allyn Connex Vital Signs Monitor (CVSM): versions prior to v2.43.02 · +6 more

Full record on NVD

Fix

  1. Update Hillrom connex central station to 1.8.6
  2. Vendor fix CISA ICSMA-21-152-01 · 1 productWelch Allyn Service Tool: v1.10
  3. Vendor fix CISA ICSMA-21-152-01 · 1 productWelch Allyn Software Development Kit (SDK): v3.2
  4. Vendor fix CISA ICSMA-21-152-01 · 1 productWelch Allyn Connex Central Station (CS): v1.8.4 Service Pack 01 (released November 2022)
  5. Vendor fix CISA ICSMA-21-152-01 · 1 productWelch Allyn Connex Device Integration Suite - Network Connectivity Engine (NCE): v5.3 (released September 2021)
  6. Vendor fix CISA ICSMA-21-152-01 · 1 productWelch Allyn Spot Vital Signs 4400 Device (Spot 4400) / Welch Allyn Spot 4400 Vital Signs Extended Care Device: v1.11.00 (Released October 2021)
  7. Vendor fix CISA ICSMA-21-152-01 · 1 productWelch Allyn Service Monitor: v1.7.0.0

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • NVDCVSS 3.17.5read 2026-10-23
  • NVDCVSS 2.05read 2026-10-23
  • CNAweakness (CWE)CWE-125read 2026-10-23
  • FIRST EPSSEPSS score1.7 %2026-10-22

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
2021-06-11
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2021-27408?

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).

Is CVE-2021-27408 actively exploited?

Active exploitation of CVE-2021-27408 has not been confirmed. Its EPSS score was 1.7% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-27408?

CVE-2021-27408 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

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