CVE-2020-23592: A vulnerability in OPTILINK OP-XT71000N Hardware Version: V2.2 , Firmware Version: OP_V3.3.1-191028 allows an

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HIGH 8.8MITIGATE

CVE-2020-23592 is a high-severity flaw (CVSS 8.8) affecting op-xt71000n firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability in OPTILINK OP-XT71000N Hardware Version: V2.2 , Firmware Version: OP_V3.3.1-191028 allows an unauthenticated, remote attacker to conduct a cross-site request forgery (CSRF) attack to Reset ONU to Factory Default through ' /mgm_dev_reset.asp.' Resetting to default leads to Escalation of Privileges by logging-in with default credentials.

Why this priority

High severity

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

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.6% (top 52%)
CISA exploited list	No
Weakness	CWE-352
Published	2022-11-23
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: optilinknetwork

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

Am I affected?

Timeline

2022-11-23 02:15 UTCPublished CVE record published
2026-06-17 03:04 UTCUpdated Record last modified

optilinknetwork op-xt71000n firmware MITIGATE

Affected: 3.3.1-191028

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.3.1-191028

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-2020-23592?

op-xt71000n firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-23592 being exploited?

CVE-2020-23592 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-2020-23592 affect?

CVE-2020-23592 affects op-xt71000n firmware. Severity is high (CVSS 8.8). A vulnerability in OPTILINK OP-XT71000N Hardware Version: V2.2 , Firmware Version: OP_V3.3.1-191028 allows an unauthenticated, remote attacker to conduct a cross-site request forgery (CSRF) attack to Reset ONU to Factory Default through ' /

How urgent is CVE-2020-23592?

Priority 43/100. High severity

Related CVEs

CVE-2020-23593 MEDIUM 6.5 MITIGATE A vulnerability in OPTILINK OP-XT71000N Hardware Version: V2.2, Firmware Version: OP_V3.3.1-191028 allows an u
CVE-2020-23591 CRITICAL 9.8 MITIGATE A vulnerability in OPTILINK OP-XT71000N Hardware Version: V2.2 , Firmware Version: OP_V3.3.1-191028 allows an
CVE-2020-23590 MEDIUM 6.5 MITIGATE A vulnerability in Optilink OP-XT71000N Hardware version: V2.2 , Firmware Version: OP_V3.3.1-191028 allows an
CVE-2020-23589 MEDIUM 6.5 MITIGATE A vulnerability in OPTILINK OP-XT71000N Hardware Version: V2.2 , Firmware Version: OP_V3.3.1-191028 allows an
CVE-2020-23588 MEDIUM 4.3 MITIGATE A vulnerability in OPTILINK OP-XT71000N Hardware Version: V2.2 , Firmware Version: OP_V3.3.1-191028 allows an

References

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