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CVE-2021-29468

27
FAUCET Score

CVE-2021-29468 describes a critical vulnerability in Cygwin Git, where specially crafted repositories containing symbolic links and backslash characters in filenames can lead to arbitrary code execution during repository checkout. This vulnerability carries a high severity CVSS score of 8.8, indicating a network-based attack with low complexity, requiring user interaction, and potentially resulting in complete compromise of confidentiality, integrity, and availability. While the vulnerability is present in upstream Git, there is currently no evidence of active exploitation, publicly available exploit code, or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.31.1-1CPE matchmatch criteria
cpe:2.3:a:cygwin:git:*:*:*:*:*:*:*:*

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
1.24%
Probability of exploitation in next 30 days
EPSS Percentile
66.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0124 is in the 64th percentile among its peer group of 14,855 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

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

cygwin.com / pipermail/cygwin-announce/2021-April/010018.html
Mailing ListPatchVendor Advisory
github.com / me-and/Cygwin-Git/blob/main/check-backslash-safety.patch
PatchThird Party Advisory
github.com / me-and/Cygwin-Git/security/advisories/GHSA-rmp3-wq55-f557
PatchThird Party Advisory
lore.kernel.org / git/CA+kUOa=juEdBMVr_gyTKjz7PkPt2DZHkXQyzcQmAWCsEHC_ssw%40mail.gmail.com/T