CVE-2021-26607: An Improper input validation in execDefaultBrowser method of NEXACRO17 allows a remote attacker to execute arb

Q: How do I fix CVE-2021-26607?

nexacro: upgrade to newer than 17.1.3.301. Exact commands for each OS are on this page.

Q: Is CVE-2021-26607 being exploited?

CVE-2021-26607 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-2021-26607 affect?

CVE-2021-26607 affects nexacro. Severity is high (CVSS 8.1). An Improper input validation in execDefaultBrowser method of NEXACRO17 allows a remote attacker to execute arbitrary command on affected systems.

This month

HIGH 8.1UPGRADE

CVE-2021-26607 is a high-severity flaw (CVSS 8.1) affecting nexacro. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An Improper input validation in execDefaultBrowser method of NEXACRO17 allows a remote attacker to execute arbitrary command on affected systems.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.9% (top 21%)
CISA exploited list	No
Weakness	CWE-20
Published	2021-10-26
Last modified	2026-06-17

Publisher (CNA): KrCERT/CC · Vendor: tobesoft

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

Am I affected?

Timeline

2021-10-26 13:15 UTCPublished CVE record published
2026-06-17 03:43 UTCUpdated Record last modified

tobesoft nexacro UPGRADE

Affected: <= 17.1.3.301

Fixed in: newer than 17.1.3.301

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy nexacro || rpm -q nexacro || nexacro --version

2. UPGRADE to newer than 17.1.3.301 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade nexacro

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade nexacro

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-2021-26607?

nexacro: upgrade to newer than 17.1.3.301. Exact commands for each OS are on this page.

Is CVE-2021-26607 being exploited?

CVE-2021-26607 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-2021-26607 affect?

CVE-2021-26607 affects nexacro. Severity is high (CVSS 8.1). An Improper input validation in execDefaultBrowser method of NEXACRO17 allows a remote attacker to execute arbitrary command on affected systems.

How urgent is CVE-2021-26607?

Priority 48/100. High severity

Related CVEs

CVE-2021-26625 HIGH 8.8 UPGRADE Insufficient Verification of input Data leading to arbitrary file download and execute was discovered in Nexac
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CVE-2021-26612 HIGH 8.1 UPGRADE An improper input validation leading to arbitrary file creation was discovered in copy method of Nexacro platf
CVE-2020-7874 HIGH 8.8 UPGRADE Download of code without integrity check vulnerability in NEXACRO14 Runtime ActiveX control of tobesoft Co., L

References

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