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CVE-2021-40324

62
FAUCET Score

CVE-2021-40324 is a critical arbitrary file write vulnerability affecting Cobbler versions prior to 3.3.0, specifically through the upload_log_data function. It carries a CVSS score of 7.5 (HIGH), indicating it can be exploited remotely with low attack complexity, potentially leading to high integrity impact without requiring user interaction. While not currently listed in CISA's KEV catalog or showing active exploitation, there is no public exploit code available, and it has received minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.3.0CPE matchmatch criteria
cpe:2.3:a:cobbler_project:cobbler:*:*:*:*:*:*:*:*

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
68.64%
Probability of exploitation in next 30 days
EPSS Percentile
99.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.6864 is in the 99th percentile among its peer group of 51,485 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)

github_advisorypatch availablevia nvd_reference
View patch
pippatch availablevia ghsa
Product: cobblerFixed in: 3.3.0

Vendor Advisories (2)

pipGHSA-4cfr-gjfx-fj3xhigh

Cobbler before 3.3.0 allows arbitrary file write operations via upload_log_data.

Oct 5, 2021
redhatCVE-2021-40324Important

cobbler: Arbitrary file write via upload_log_data XMLRPC function

Sep 20, 2021

References

github.com / cobbler/cobbler/commit/d8f60bbf14a838c8c8a1dba98086b223e35fe70a
PatchThird Party Advisory
github.com / cobbler/cobbler/releases/tag/v3.3.0
ProductThird Party Advisory