CVE-2020-23591
CWE-434Published: November 23, 2022· Updated: Jun 17, 2026
Official 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.
Risk Analysis
This vulnerability allows unauthenticated attackers to upload arbitrary files to OPTILINK devices, potentially leading to denial of service or the installation of backdoors. It is rated as critical with a 9.8 CVSS score.
No public exploit is known, and it is not in the KEV catalog. The flaw is remotely exploitable.
Restrict access to the device management interface and apply any available firmware updates from the vendor.
Technical Analysis
CVE-2020-23591 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.
CVSS v3.1 Vector Breakdown
Affected Vendors & Products
Exploit & PoC Resources
Official Patches & Advisories
All References (2)
Quick Facts
Related CVEs (CWE-434)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2020-23591 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts