No exploitation reportedFix available

CVE-2021-27480

No exploitation reported by the sources we read.

Published2021-04-27
WeaknessCWE-121

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

Delta Industrial Automation COMMGR Versions 1.12 and prior are vulnerable to a stack-based buffer overflow, which may allow an attacker to execute remote code.

Timeline

dates in UTC

2021-04-2712:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 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-2021-27480?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-27480?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Deltaww industrial automation commgr

Branch	Affected	Fixed in	Source
1.12	≤ 1.12	no fix published	NVD

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

ICSA-21-110-03 CISA1 known affected
Delta Industrial Automation COMMGR
COMMGR: Version 1.12 and prior

Full record on NVD

Fix

Vendor fix CISA ICSA-21-110-03 · 1 productDelta Electronics has released COMMGR v1.13 to address this vulnerability and recommends users to upgrade.

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.19.8read 2026-10-23
NVDCVSS 2.07.5read 2026-10-23
CNAweakness (CWE)CWE-121read 2026-10-23
FIRST EPSSEPSS score1.3 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2021-04-27
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2021-27480?

Delta Industrial Automation COMMGR Versions 1.12 and prior are vulnerable to a stack-based buffer overflow, which may allow an attacker to execute remote code.

Is CVE-2021-27480 actively exploited?

Active exploitation of CVE-2021-27480 has not been confirmed. Its EPSS score was 1.3% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-27480?

CVE-2021-27480 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Running Delta Industrial Automation? Hear about its next vulnerability

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

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