CVE-2021-21957: A privilege escalation vulnerability exists in the Remote Server functionality of Dream Report ODS Remote Conn

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HIGH 7.3DOWNGRADE

CVE-2021-21957 is a high-severity flaw (CVSS 7.3) affecting remote connector. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A privilege escalation vulnerability exists in the Remote Server functionality of Dream Report ODS Remote Connector 20.2.16900.0. A specially-crafted command injection can lead to elevated capabilities. An attacker can provide a malicious file to trigger this vulnerability.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	7.3 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	1.2% (top 31%)
CISA exploited list	No
Weakness	CWE-276
Published	2021-12-08
Last modified	2026-06-17

Publisher (CNA): Talos · Vendor: dreamreport

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

Am I affected?

Timeline

2021-12-08 22:15 UTCPublished CVE record published
2026-06-17 03:36 UTCUpdated Record last modified

dreamreport remote connector DOWNGRADE

Affected: 20.2.16900.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 20.2.16900.0

1. Check installed version

apt-cache policy remote-connector || rpm -q remote-connector || remote-connector --version

2. No fixed release: DOWNGRADE to a release before 20.2.16900.0 (Debian / Ubuntu)

apt-cache madison remote-connector sudo apt install remote-connector=<VERSION_BEFORE_20.2.16900.0> sudo apt-mark hold remote-connector

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

dnf --showduplicates list remote-connector sudo dnf downgrade remote-connector-<VERSION_BEFORE_20.2.16900.0> sudo dnf versionlock add remote-connector

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-2021-21957?

remote connector: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-21957 being exploited?

CVE-2021-21957 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-2021-21957 affect?

CVE-2021-21957 affects remote connector. Severity is high (CVSS 7.3). A privilege escalation vulnerability exists in the Remote Server functionality of Dream Report ODS Remote Connector 20.2.16900.0. A specially-crafted command injection can lead to elevated capabilities. An attacker can provide a malicious f

How urgent is CVE-2021-21957?

Priority 48/100. High severity; Public exploit reference

References

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