CVE-2021-38611: A command-injection vulnerability in the Image Upload function of the NASCENT RemKon Device Manager 4.0.0.0 al

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2021-38611 is a critical-severity flaw (CVSS 9.8) affecting remkon device manager. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A command-injection vulnerability in the Image Upload function of the NASCENT RemKon Device Manager 4.0.0.0 allows attackers to execute arbitrary commands, as root, via shell metacharacters in the filename parameter to assets/index.php.

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.9% (top 20%)
CISA exploited list	No
Weakness	CWE-77
Published	2021-08-24
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: nascent

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

Am I affected?

Timeline

2021-08-24 12:15 UTCPublished CVE record published
2026-06-17 04:02 UTCUpdated Record last modified

nascent remkon device manager DOWNGRADE

Affected: 4.0.0.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.0.0.0

1. Check installed version

apt-cache policy remkon-device-manager || rpm -q remkon-device-manager || remkon-device-manager --version

2. No fixed release: DOWNGRADE to a release before 4.0.0.0 (Debian / Ubuntu)

apt-cache madison remkon-device-manager sudo apt install remkon-device-manager=<VERSION_BEFORE_4.0.0.0> sudo apt-mark hold remkon-device-manager

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list remkon-device-manager sudo dnf downgrade remkon-device-manager-<VERSION_BEFORE_4.0.0.0> sudo dnf versionlock add remkon-device-manager

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-2021-38611?

remkon device manager: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-38611 being exploited?

CVE-2021-38611 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-2021-38611 affect?

CVE-2021-38611 affects remkon device manager. Severity is critical (CVSS 9.8). A command-injection vulnerability in the Image Upload function of the NASCENT RemKon Device Manager 4.0.0.0 allows attackers to execute arbitrary commands, as root, via shell metacharacters in the filename parameter to assets/index.php.

How urgent is CVE-2021-38611?

Priority 64/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

Related CVEs

CVE-2021-38613 CRITICAL 9.8 DOWNGRADE The assets/index.php Image Upload feature of the NASCENT RemKon Device Manager 4.0.0.0 allows attackers to upl
CVE-2021-38612 HIGH 7.5 DOWNGRADE In NASCENT RemKon Device Manager 4.0.0.0, a Directory Traversal vulnerability in a log-reading function in mai

References

← Back to latest CVEs