CVE-2020-35391F3 Firmware Vulnerability
Tenda N300 F3 12.01.01.48 devices allow remote attackers to obtain sensitive information (possibly including an http_passwd line) via a direct request for cgi-bin/DownloadCfg/RouterCfm.cfg, a related issue to CVE-2017-14942.
Published Jan 1, 2021 · Updated Nov 21, 2024
Key Facts
Patch immediately- CVE-2020-35391 is a medium-severity vulnerability (CVSS 6.5 v3.1) affecting F3 Firmware (Tenda).
- It is exploited in the wild, listed in Industry KEV feed since Sep 18, 2024. Public exploit code is available.
- EPSS estimates a 35% probability of exploitation in the next 30 days.
- No fixed version is listed yet; check the vendor advisory for mitigations.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Scores
CVSS v3.1
6.5
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS (30-day exploit likelihood)
35%
Higher than 98.4% of all scored CVEs
Exploit maturity
Exploited (KEV)
ATLAS score
46/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Sep 18, 2024
1356 days after publication
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Exploited (KEV)
Public exploit code
1
Proof-of-concept links
In-the-wild evidence
1
Reports of active use
Description
Tenda N300 F3 12.01.01.48 devices allow remote attackers to obtain sensitive information (possibly including an http_passwd line) via a direct request for cgi-bin/DownloadCfg/RouterCfm.cfg, a related issue to CVE-2017-14942.
NOTE: the vulnerability report may suggest that either a ? character must be placed after the RouterCfm.cfg filename, or that the HTTP request headers must be unusual, but it is not known why these are relevant to the device's HTTP response behavior.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Sep 18, 2024 | n/a | Not reported |
Affected Products
1 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| F3 FirmwareTenda | 12.01.01.48 | n/a |
Timeline
Publicly disclosed
Jan 1, 2021
Added to Industry KEV feed
Sep 18, 2024
Last updated
Nov 21, 2024
Weakness Type
- CWE-425 Direct Request ('Forced Browsing')
FAQ
Common Questions.
Tenda N300 F3 12.01.01.48 devices allow remote attackers to obtain sensitive information (possibly including an http_passwd line) via a direct request for cgi-bin/DownloadCfg/RouterCfm.cfg, a related issue to CVE-2017-14942.
Affected: F3 Firmware (Tenda) versions 12.01.01.48. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since Sep 18, 2024.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Is CVE-2020-35391 On Your Attack Surface?
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