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CVE-2021-39158

26
FAUCET Score

CVE-2021-39158 describes a supply chain vulnerability in NVCaffe, where its Python dependency list incorrectly referenced a non-existent 'gfortran' package on pypi.org. This allowed an attacker to potentially upload a malicious package under that name, leading to arbitrary code execution with high impact on confidentiality, integrity, and availability if a user installed it. Rated 8.8 HIGH, the vulnerability requires user interaction but has low attack complexity. There is no evidence of active exploitation, public exploit code, or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.17.4CPE matchmatch criteria
cpe:2.3:a:nvidia:nvcaffe:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.50%
Probability of exploitation in next 30 days
EPSS Percentile
39.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0050 is in the 42nd percentile among its peer group of 14,875 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

github.com / NVIDIA/caffe/security/advisories/GHSA-fmpp-8pwg-vwh9
Third Party Advisory