How severe is CVE-2020-23591?

CVE-2020-23591 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-23591 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-23591?

CVE-2020-23591 affects Optilinknetwork Op-xt71000n Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-23591?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2020-23591 published?

CVE-2020-23591 was published on 2022-11-23 and last updated on 2026-06-17.

CVE-2020-23591

CVE-2020-23591 is a critical-severity vulnerability in Optilinknetwork Op-xt71000n Firmware with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-434.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (60th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Optilinknetwork Op-xt71000n Firmware
Published: 2022-11-23
Last modified: 2026-06-17

Description

A vulnerability in OPTILINK OP-XT71000N Hardware Version: V2.2 , Firmware Version: OP_V3.3.1-191028 allows an attacker to upload arbitrary files through " /mgm_dev_upgrade.asp " which can "delete every file for Denial of Service (using 'rm -rf *.*' in the code), reverse connection (using '.asp' webshell), backdoor.

Frequently asked questions

What is CVE-2020-23591?: A vulnerability in OPTILINK OP-XT71000N Hardware Version: V2.2 , Firmware Version: OP_V3.3.1-191028 allows an attacker to upload arbitrary files through " /mgm_dev_upgrade.asp " which can "delete every file for Denial of Service (using 'rm -rf *.*' in the code), reverse connection (using '.asp' webshell), backdoor.
How severe is CVE-2020-23591?: CVE-2020-23591 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-23591 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-23591?: CVE-2020-23591 affects Optilinknetwork Op-xt71000n Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-23591?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-23591 published?: CVE-2020-23591 was published on 2022-11-23 and last updated on 2026-06-17.

References

https://github.com/huzaifahussain98/CVE-2020-23591

Affected products (1)

cpe:2.3:o:optilinknetwork:op-xt71000n_firmware:3.3.1-191028:*:*:*:*:*:*:*

More vulnerabilities in Optilinknetwork Op-xt71000n Firmware

CVE-2020-23584 — Critical (CVSS 9.8): Unauthenticated remote code execution in OPTILINK OP-XT71000N, Hardware Version: V2.2 occurs when the attacker passes…
CVE-2020-23583 — Critical (CVSS 9.8): OPTILINK OP-XT71000N V2.2 is vulnerable to Remote Code Execution. The issue occurs when the attacker sends an arbitrary…
CVE-2020-23592 — High (CVSS 8.8): A vulnerability in OPTILINK OP-XT71000N Hardware Version: V2.2 , Firmware Version: OP_V3.3.1-191028 allows an…
CVE-2020-23585 — High (CVSS 8.8): A remote attacker can conduct a cross-site request forgery (CSRF) attack on OPTILINK OP-XT71000N Hardware Version: V2.2…
CVE-2020-23590 — Medium (CVSS 6.5): A vulnerability in Optilink OP-XT71000N Hardware version: V2.2 , Firmware Version: OP_V3.3.1-191028 allows an…
CVE-2020-23589 — Medium (CVSS 6.5): A vulnerability in OPTILINK OP-XT71000N Hardware Version: V2.2 , Firmware Version: OP_V3.3.1-191028 allows an…

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