CVE-2020-23586Network attack vector

Traffic-control rule creation via missing CSRF protection

Published Nov 23, 2022 · Updated Apr 25, 2025

CSRF in OPTILINK OP-XT71000N V2.2 firmware OP_V3.3.1-191028 allows remote attackers to add a network traffic-control rule. The /net_qos_cls_edit.asp endpoint accepts a rule-creation request without sufficient CSRF protections. A management user with an active session must be induced to submit the crafted request, which changes the device's traffic-control configuration.

CVSS severity4.3
Medium
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CSRF in OPTILINK OP-XT71000N V2.2 firmware OP_V3.3.1-191028 allows remote attackers to add a network traffic-control rule. The /net_qos_cls_edit.asp endpoint accepts a rule-creation request without sufficient CSRF protections. A management user with an active session must be induced to submit the crafted request, which changes the device's traffic-control configuration.

The record

CVE
CVE-2020-23586
Published
Nov 23, 2022
Updated
Apr 25, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-352
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 23, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 25, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
4.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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