CVE-2021-26613: improper input validation vulnerability in nexacro permits copying file to the startup folder using rename met

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HIGH 8.1UPGRADE

CVE-2021-26613 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.

improper input validation vulnerability in nexacro permits copying file to the startup folder using rename method.

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	0.8% (top 42%)
CISA exploited list	No
Weakness	CWE-20
Published	2022-02-09
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

2022-02-09 23:15 UTCPublished CVE record published
2026-06-17 03:43 UTCUpdated Record last modified

tobesoft nexacro UPGRADE

Affected: >= 17.0 and < 17.1.2.500

Fixed in: 17.1.2.500

Safe to downgrade to: a release before 17.0

1. Check installed version

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

2. UPGRADE to 17.1.2.500 (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.

3. If no update is available yet, DOWNGRADE to a release before 17.0 (Debian / Ubuntu)

apt-cache madison nexacro sudo apt install nexacro=<VERSION_BEFORE_17.0> sudo apt-mark hold nexacro

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list nexacro sudo dnf downgrade nexacro-<VERSION_BEFORE_17.0> sudo dnf versionlock add nexacro

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2021-26613?

nexacro: upgrade to 17.1.2.500. Exact commands for each OS are on this page.

Is CVE-2021-26613 being exploited?

CVE-2021-26613 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-2021-26613 affect?

CVE-2021-26613 affects nexacro. Severity is high (CVSS 8.1). improper input validation vulnerability in nexacro permits copying file to the startup folder using rename method.

How urgent is CVE-2021-26613?

Priority 43/100. 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
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-2021-26607 HIGH 8.1 UPGRADE An Improper input validation in execDefaultBrowser method of NEXACRO17 allows a remote attacker to execute arb
CVE-2020-7874 HIGH 8.8 UPGRADE Download of code without integrity check vulnerability in NEXACRO14 Runtime ActiveX control of tobesoft Co., L
CVE-2019-19167 HIGH 7.8 UPGRADE Tobesoft Nexacro v2019.9.25.1 and earlier version have an arbitrary code execution vulnerability by using meth

References

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