What is CVE-2025-40889?
A path traversal vulnerability was discovered in the Time Machine functionality due to missing validation of two input parameters. An authenticated user with limited privileges, by issuing a specifically-crafted request, can potentially alter the structure and content of files in the /data folder, and/or affect their availability.
The record classifies CVE-2025-40889 under weakness class CWE-22. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs low-privilege credentials, needs no user interaction, and has high impact on integrity, availability. 2 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 368 days ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 8.1 — HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H - CVSS v4.0 base score
- 7.2
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N - EPSS (FIRST)
- 0.4% probability of exploitation in the next 30 days, higher than 32.8% of all scored CVEs
- CISA KEV
- Not listed in the CISA Known Exploited Vulnerabilities catalog
- Threadlinqs priority
- 7.4/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- Published
- 2025-10-07
Is CVE-2025-40889 being exploited?
Weaponised exploit code for CVE-2025-40889 is publicly available. 1 public proof-of-concept repository is tracked for this identifier. It currently carries a trending score of 21 in the Threadlinqs vulnerability feed.
- trickest/cve (trickest)
Affected products and versions
- Nozomi Networks: Guardian, CMC
How to fix CVE-2025-40889
No vendor patch reference has been recorded for CVE-2025-40889 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.
Threat activity tracking CVE-2025-40889
1 tracked threat in the Threadlinqs corpus references CVE-2025-40889, either in the campaign’s CVE list or as an indicator on the campaign record.
Sources
Enriched from CVE.org, FIRST EPSS, public proof-of-concept repositories. Last verified by Threadlinqs on .