CVE-2025-61939An unused function in MicroServer can start a reverse SSH connection to a vendor registered domain, without mutual authentication.
Updated under an hour ago ()
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It affects columbiaweather weather_microserver_firmware. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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An unused function in MicroServer can start a reverse SSH connection to a vendor registered domain, without mutual authentication. An attacker on the local network with admin access to the web server, and the ability to manipulate DNS responses, can redirect the SSH connection to an attacker controlled device.
- CVSS
- 4.4 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
- Weakness (CWE)
- CWE-923
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Oct 7, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
columbiaweather weather_microserver_firmware columbiaweather:weather_microserver_firmware | before MS_4.1_14142 | NVD |
References
- https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-006-01.jsonthird-party-advisory
- https://www.cisa.gov/news-events/ics-advisories/icsa-26-006-01third-party-advisory, us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.