CVE-2021-29468

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.8 under NVD CVSS v3. EPSS exploit probability: 1.2% (68th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1.2%CVSS: 8.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Cygwin Git is a patch set for the git command line tool for the cygwin environment. A specially crafted repository that contains symbolic links as well as files with backslash characters in the file name may cause just-checked out code to be executed while checking out a repository using Git on Cygwin. The problem will be patched in the Cygwin Git v2.31.1-2 release. At time of writing, the vulnerability is present in the upstream Git source code; any Cygwin user who compiles Git for themselves from upstream sources should manually apply a patch to mitigate the vulnerability. As mitigation users should not clone or pull from repositories from untrusted sources. CVE-2019-1354 was an equivalent vulnerability in Git for Visual Studio.

CVSS v3
8.8
EG Score
8.8HIGHmedium confidence
EG Risk
45
EG Risk 45/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity88% × 45%
Exploitation1% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
1.2%
EPSS %ILE
68th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track or Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

April 29, 2021

Last Modified

November 21, 2024

Advisory Details (3)

Auto-updated Aug 21, 2026
Patch available. Sources: github.
generic

Security vulnerability in Git for Cygwin

https://lore.kernel.org/git/CA+kUOa=juEdBMVr_gyTKjz7PkPt2DZHkXQyzcQmAWCsEHC_ssw%40mail.gmail.com/T/#u
github Patch Available

Arbitrary code execution when checking out an attacker-controlled Git branch · Advisory · cygporter/git · GitHub

https://github.com/me-and/Cygwin-Git/security/advisories/GHSA-rmp3-wq55-f557
generic

Security vulnerability in Git for Cygwin

https://cygwin.com/pipermail/cygwin-announce/2021-April/010018.html

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 9× in last 7d / 33× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 181 total refreshes for this CVE.

  1. 2026-10-05 17:40 UTCEPSS rescore
  2. 2026-10-04 23:19 UTCEPSS rescore
  3. 2026-10-03 14:22 UTCEPSS rescore
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  7. 2026-09-30 15:34 UTCEG score recompute
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  11. 2026-09-27 13:41 UTCEPSS rescore
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  14. 2026-09-26 02:45 UTCOSV refresh
  15. 2026-09-26 00:21 UTCEPSS rescore
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  1. 2026-09-13 16:43 UTCEPSS rescore
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  3. 2026-09-11 14:49 UTCEPSS rescore
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  5. 2026-09-08 21:56 UTCEPSS rescore
  6. 2026-09-07 15:58 UTCEPSS rescore
  7. 2026-09-06 17:43 UTCOSV refresh
  8. 2026-09-06 13:44 UTCEPSS rescore
  9. 2026-09-05 15:25 UTCEPSS rescore
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  18. 2026-08-28 21:37 UTCEPSS rescore
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  22. 2026-08-24 14:12 UTCEPSS rescore
  23. 2026-08-23 00:16 UTCEPSS rescore
  24. 2026-08-21 23:46 UTCEPSS rescore
  25. 2026-08-20 22:52 UTCEPSS rescore
  26. 2026-08-20 03:45 UTCOSV refresh
  27. 2026-08-19 17:01 UTCEPSS rescore
  28. 2026-08-18 13:45 UTCEPSS rescore
  29. 2026-08-16 14:53 UTCEPSS rescore
  30. 2026-08-16 02:11 UTCEPSS rescore
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  36. 2026-08-09 13:43 UTCEPSS rescore
  37. 2026-08-08 16:33 UTCEPSS rescore
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  39. 2026-08-06 13:43 UTCEPSS rescore
  40. 2026-08-05 19:14 UTCEPSS rescore
  41. 2026-08-04 23:10 UTCOSV refresh
  42. 2026-08-04 15:06 UTCEPSS rescore
  43. 2026-08-04 10:34 UTCEPSS rescore
  44. 2026-08-03 10:33 UTCEPSS rescore
  45. 2026-08-02 02:24 UTCEPSS rescore
  46. 2026-08-01 04:13 UTCEPSS rescore
  47. 2026-07-30 16:25 UTCEPSS rescore
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  49. 2026-07-30 01:28 UTCEPSS rescore
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  51. 2026-07-28 15:33 UTCEPSS rescore
  52. 2026-07-26 14:52 UTCEPSS rescore
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  54. 2026-07-25 14:15 UTCEPSS rescore
  55. 2026-07-24 14:15 UTCEPSS rescore
  56. 2026-07-23 14:16 UTCEPSS rescore
  57. 2026-07-23 01:59 UTCEG score recompute
  58. 2026-07-22 22:46 UTCEG score recompute
  59. 2026-07-22 14:06 UTCEPSS rescore
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  61. 2026-07-21 15:22 UTCEPSS rescore
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  63. 2026-07-20 17:05 UTCEPSS rescore
  64. 2026-07-19 14:28 UTCEPSS rescore
  65. 2026-07-19 02:27 UTCEPSS rescore
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  67. 2026-07-18 21:29 UTCOSV refresh
  68. 2026-07-18 10:02 UTCEPSS rescore
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  70. 2026-07-16 17:00 UTCEPSS rescore
  71. 2026-07-15 16:55 UTCEPSS rescore
  72. 2026-07-15 16:55 UTCEPSS rescore
  73. 2026-07-15 01:58 UTCEPSS rescore
  74. 2026-07-13 22:27 UTCEPSS rescore
  75. 2026-07-13 22:27 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2021-29468?
CVE-2021-29468 is a high vulnerability published on April 29, 2021. Cygwin Git is a patch set for the git command line tool for the cygwin environment. A specially crafted repository that contains symbolic links as well as files with backslash characters in the file name may cause just-checked out code to be executed while checking out a repository using Git on…
When was CVE-2021-29468 disclosed?
CVE-2021-29468 was first published on April 29, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-29468 actively exploited?
CVE-2021-29468 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.2% probability of exploitation in the next 30 days (68th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2021-29468?
CVE-2021-29468 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2021-29468?
A fix for CVE-2021-29468 is available: update to the fixed version the vendor names in its advisory.

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