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CVE-2021-41054

26
FAUCET Score

CVE-2021-41054 is a buffer overflow vulnerability in atftp versions through 0.7.4, specifically within the tftpd_file.c component, due to improper buffer-size handling when processing data, OACK, and other options. This vulnerability carries a CVSS score of 7.5 (High), indicating it can be exploited remotely with low attack complexity, requiring no user interaction, and leading to a high impact on availability. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.7.4CPE matchmatch criteria
cpe:2.3:a:atftp_project:atftp:*:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

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:N/A:H

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

Exploit Intelligence

EPSS Score
2.58%
Probability of exploitation in next 30 days
EPSS Percentile
83.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0258 is in the 71st percentile among its peer group of 51,551 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 (2)

microsoftpatch availablevia msrc
Product: 18996-16820Fixed in: 0.7.5-1
microsoftpatch availablevia msrc
Product: cm1 atftp 0.7.5-1 on CBL Mariner 1.0Fixed in: 0.7.5-1

Vendor Advisories (1)

microsoft2021-Sep/CVE-2021-41054Important

tftpd_file.c in atftp through 0.7.4 has a buffer overflow because buffer-size handling does not properly consider the combination of data OACK and other options.

Sep 14, 2021

References

github.com / nu11secur1ty/CVE-mitre/tree/main/CVE-2021-41054
ExploitThird Party Advisory
lists.debian.org / debian-lts-announce/2021/11/msg00014.html
Mailing ListThird Party Advisory
sourceforge.net / p/atftp/code/ci/d255bf90834fb45be52decf9bc0b4fb46c90f205
PatchThird Party Advisory