CVE-2020-36909: SnapGear Management Console SG560 3.1.5 contains a file manipulation vulnerability that allows authenticated u

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MEDIUM 6.5MITIGATE

CVE-2020-36909 is a medium-severity flaw (CVSS 6.5) affecting snapgear sg560 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

SnapGear Management Console SG560 3.1.5 contains a file manipulation vulnerability that allows authenticated users to read, write, and delete files using the edit_config_files CGI script. Attackers can manipulate POST request parameters in /cgi-bin/cgix/edit_config_files to access and modify files outside the intended /etc/config/ directory.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.7% (top 46%)
CISA exploited list	No
Weakness	CWE-22
Published	2026-01-06
Last modified	2026-06-17

Publisher (CNA): VulnCheck · Vendor: securecomputing

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

Am I affected?

Timeline

2026-01-06 16:15 UTCPublished CVE record published
2026-06-17 03:16 UTCUpdated Record last modified

securecomputing snapgear sg560 firmware MITIGATE

Affected: 3.1.5

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.1.5

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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-2020-36909?

snapgear sg560 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-36909 being exploited?

CVE-2020-36909 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-2020-36909 affect?

CVE-2020-36909 affects snapgear sg560 firmware. Severity is medium (CVSS 6.5). SnapGear Management Console SG560 3.1.5 contains a file manipulation vulnerability that allows authenticated users to read, write, and delete files using the edit_config_files CGI script. Attackers can manipulate POST request parameters in

How urgent is CVE-2020-36909?

Priority 41/100. Public exploit reference

Related CVEs

CVE-2020-36908 MEDIUM 5.3 MITIGATE SnapGear Management Console SG560 version 3.1.5 contains a cross-site request forgery vulnerability that allow

References

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