CVE-2020-18305: Extreme Networks EXOS before v.22.7 and before v.30.2 was discovered to contain an issue in its Web GUI which

Q: How do I fix CVE-2020-18305?

extremexos: upgrade to 22.7. Exact commands for each OS are on this page.

Q: Is CVE-2020-18305 being exploited?

CVE-2020-18305 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-2020-18305 affect?

CVE-2020-18305 affects extremexos. Severity is high (CVSS 8.0). Extreme Networks EXOS before v.22.7 and before v.30.2 was discovered to contain an issue in its Web GUI which fails to restrict URL access, allowing attackers to access sensitive information or escalate privileges.

Q: How urgent is CVE-2020-18305?

Priority 46/100. High severity; Public exploit reference

This month

HIGH 8.0UPGRADE

CVE-2020-18305 is a high-severity flaw (CVSS 8.0) affecting extremexos. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Extreme Networks EXOS before v.22.7 and before v.30.2 was discovered to contain an issue in its Web GUI which fails to restrict URL access, allowing attackers to access sensitive information or escalate privileges.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.0 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.7% (top 47%)
CISA exploited list	No
Weakness	CWE-287
Published	2024-05-14
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: extremenetworks

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

Am I affected?

Timeline

2024-05-14 06:36 UTCPublished CVE record published
2026-06-17 02:59 UTCUpdated Record last modified

extremenetworks extremexos UPGRADE

Affected: < 22.7 · 30.1

Fixed in: 22.7

Safe to downgrade to: no unaffected older release

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-2020-18305?

extremexos: upgrade to 22.7. Exact commands for each OS are on this page.

Is CVE-2020-18305 being exploited?

CVE-2020-18305 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-2020-18305 affect?

CVE-2020-18305 affects extremexos. Severity is high (CVSS 8.0). Extreme Networks EXOS before v.22.7 and before v.30.2 was discovered to contain an issue in its Web GUI which fails to restrict URL access, allowing attackers to access sensitive information or escalate privileges.

How urgent is CVE-2020-18305?

Priority 46/100. High severity; Public exploit reference

Related CVEs

CVE-2024-27453 HIGH 8.6 UPGRADE In Extreme XOS through 22.6.1.4, a read-only user can escalate privileges to root via a crafted HTTP POST requ

References

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