Public proof of concept

CVE-2026-22557

A public proof of concept exists; no exploitation attested.

Published2026-03-19
WeaknessCWE-22

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A malicious actor with access to the network could exploit a Path Traversal vulnerability found in the UniFi Network Application to access files on the underlying system that could be manipulated to access an underlying account.

Timeline

dates in UTC

2026-03-1915:16CVE publishedNVD
2026-10-2319:23First public proof of conceptPoC-in-GitHub
2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-22557?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-22557?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2026-22557 yet.

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

read 2026-10-23 19:25 UTC

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: 5 repositories, unverifiedGarethMSheldon/cve-2026-22557-unifi-detection0xBlackash/CVE-2026-22557ThePotatoOfDoom/CVE-2026-22557-PoCBishopFox/CVE-2026-22557-checkgagaltotal/CVE-2026-22557-Path-Traversal-Ubiquti-UniFi

Sources

NVDCVE recordread 2026-10-23
CISA-ADPSSVC decisionnone2026-03-19
OpenCVESSVC decisionnone—
CNACVSS 3.110read 2026-10-23
CISA-ADPweakness (CWE)CWE-222026-03-19
FIRST EPSSEPSS score28.1 %read 2026-10-23
PoC-in-GitHubproof of concept5read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Published: 2026-03-19
Last Modified: 2026-06-17
NVD status: Deferred

Frequently asked questions

What is CVE-2026-22557?

Is CVE-2026-22557 actively exploited?

Active exploitation of CVE-2026-22557 has not been confirmed. Its EPSS score was 28.1% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-22557?

CVE-2026-22557 has a CVSS v3 base score of 10 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

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