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CVE-2021-36370

25
FAUCET Score

CVE-2021-36370 describes a vulnerability in Midnight Commander versions up to 4.8.26 where SFTP connections fail to check or display the server's fingerprint, preventing users from verifying server authenticity. This high-severity vulnerability (CVSS 7.5) is easily exploitable over the network with low complexity, potentially leading to integrity compromise without user interaction. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.8.26CPE matchmatch criteria
cpe:2.3:a:midnight-commander:midnight_commander:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.99%
Probability of exploitation in next 30 days
EPSS Percentile
78.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0199 is in the 62nd percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (8)

microsoftpatch availablevia msrc
Product: 19000-16820Fixed in: 4.8.27-1
microsoftpatch availablevia msrc
Product: 19001-16823Fixed in: 4.8.27-1
microsoftpatch availablevia msrc
Product: cm1 mc 4.8.27-1 on CBL Mariner 1.0Fixed in: 4.8.27-1
microsoftpatch availablevia msrc
Product: cbl2 mc 4.8.27-1 on CBL Mariner 2.0Fixed in: 4.8.27-1
microsoftpatch availablevia msrc
Product: CBL Mariner 1.0 x64Fixed in: 4.8.27-1
microsoftpatch availablevia msrc
Product: CBL Mariner 1.0 ARMFixed in: 4.8.27-1
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 x64Fixed in: 4.8.27-1
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 ARMFixed in: 4.8.27-1

Vendor Advisories (2)

microsoft2021-Sep/CVE-2021-36370

CVE-2021-36370

Sep 14, 2021
microsoft2021-Aug/CVE-2021-36370Important

An issue was discovered in Midnight Commander through 4.8.26. When establishing an SFTP connection the fingerprint of the server is neither checked nor displayed. As a result a user connects to the server without the ability to verify its authenticity.

Aug 10, 2021

References

docs.ssh-mitm.at / CVE-2021-36370.html
ExploitThird Party Advisory
github.com / MidnightCommander/mc/blob/5c1d3c55dd15356ec7d079084d904b7b0fd58d3e/src/vfs/sftpfs/connection.c
ExploitThird Party Advisory
github.com / MidnightCommander/mc/blob/master/src/vfs/sftpfs/connection.c
ExploitThird Party Advisory
mail.gnome.org / archives/mc-devel/2021-August/msg00008.html
Release NotesThird Party Advisory
midnight-commander.org
Vendor Advisory
sourceforge.net / projects/mcwin32/files
ProductThird Party Advisory