CVE-2021-22664: CNCSoft-B Versions 1.0.0.3 and prior is vulnerable to an out-of-bounds write, which may allow an attacker to e

Q: How do I fix CVE-2021-22664?

cncsoft-b: upgrade to newer than 1.0.0.3. Exact commands for each OS are on this page.

Q: Is CVE-2021-22664 being exploited?

CVE-2021-22664 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-22664 affect?

CVE-2021-22664 affects cncsoft-b. Severity is high (CVSS 7.8). CNCSoft-B Versions 1.0.0.3 and prior is vulnerable to an out-of-bounds write, which may allow an attacker to execute arbitrary code.

This month

HIGH 7.8UPGRADE

CVE-2021-22664 is a high-severity flaw (CVSS 7.8) affecting cncsoft-b. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

CNCSoft-B Versions 1.0.0.3 and prior is vulnerable to an out-of-bounds write, which may allow an attacker to execute arbitrary code.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.6% (top 25%)
CISA exploited list	No
Weakness	CWE-787
Published	2021-04-27
Last modified	2026-06-17

Publisher (CNA): ICS-CERT · Vendor: criticalmanufacturing

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-04-27 13:15 UTCPublished CVE record published
2026-06-17 03:37 UTCUpdated Record last modified

criticalmanufacturing cncsoft-b UPGRADE

Affected: <= 1.0.0.3

Fixed in: newer than 1.0.0.3

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy cncsoft-b || rpm -q cncsoft-b || cncsoft-b --version

2. UPGRADE to newer than 1.0.0.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade cncsoft-b

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade cncsoft-b

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-22664?

cncsoft-b: upgrade to newer than 1.0.0.3. Exact commands for each OS are on this page.

Is CVE-2021-22664 being exploited?

CVE-2021-22664 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-22664 affect?

CVE-2021-22664 affects cncsoft-b. Severity is high (CVSS 7.8). CNCSoft-B Versions 1.0.0.3 and prior is vulnerable to an out-of-bounds write, which may allow an attacker to execute arbitrary code.

How urgent is CVE-2021-22664?

Priority 46/100. High severity

Related CVEs

CVE-2024-1941 HIGH 7.8 UPGRADE Delta Electronics CNCSoft-B versions 1.0.0.4 and prior are vulnerable to a stack-based buffer overflow, which
CVE-2024-1595 HIGH 7.8 UPGRADE UPGRADE Delta Electronics CNCSoft-B DOPSoft prior to v4.0.0.82 insecurely loads libraries, which may allow an attack
CVE-2023-4685 HIGH 7.8 UPGRADE UPGRADE Delta Electronics' CNCSoft-B version 1.0.0.4 and DOPSoft versions 4.0.0.82 and prior are vulnerable to stack-b
CVE-2023-25177 HIGH 7.8 UPGRADE Delta Electronics' CNCSoft-B DOPSoft versions 1.0.0.4 and prior are vulnerable to stack-based buffer overflo
CVE-2023-24014 HIGH 7.8 UPGRADE Delta Electronics' CNCSoft-B DOPSoft versions 1.0.0.4 and prior are vulnerable to heap-based buffer overflow,

References

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