CVE-2021-21897

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2022-05-24. NVD baseline CVSS 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, 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: 3%CVSS: 8.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

A code execution vulnerability exists in the DL_Dxf::handleLWPolylineData functionality of Ribbonsoft dxflib 3.17.0. A specially-crafted .dxf file can lead to a heap buffer overflow. An attacker can provide a malicious file to trigger this vulnerability.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
45(Track)
EG Risk 45/100SSVC: Track

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%
Exploitation3% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
3%
EPSS %ILE
86%
KEV
Not listed

Published

September 8, 2021

Last Modified

November 21, 2024

Advisory Details (6)

Auto-updated Aug 6, 2026
Patch available.
generic

[SECURITY] Fedora 36 Update: cloudcompare-2.11.3-4.fc36 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IMGMEPTYL7WTQ333J6SMC6MUHDMMWT3O/
generic

[SECURITY] Fedora 36 Update: libdxflib-3.26.4-2.fc36 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DA4C4X5GMM65VYLUW7Q7YL6P5NDB633A/
generic

[SECURITY] Fedora 35 Update: cloudcompare-2.9.1-16.fc35 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5BUOTYU3KKIYE4BEBUFA4MRS462P3OWM/
generic Patch Available

[SECURITY] [DLA 3046-1] librecad security update

https://lists.debian.org/debian-lts-announce/2022/06/msg00008.html
generic

TALOS-2021-1346 || Cisco Talos Intelligence Group - Comprehensive Threat Intelligence

https://talosintelligence.com/vulnerability_reports/TALOS-2021-1346
generic

[SECURITY] Fedora 37 Update: cloudcompare-2.11.3-4.fc37 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L2H36XRMAPQBIOVIIFX6KUT5YOG2ETM6/

Affected Packages

(17 across 5 ecosystems)
Debian:11(4)
PackageVulnerable rangeFixed inDependents
cloudcompare2.10.3-4 ... 2.13~git20230616+ds-2 (22 versions)——
dxflib3.17.0-3, 3.26.4-1, 3.26.4-2, 3.26.4-3——
horizon-eda1.4.0-1 ... 2.6.0-2.3 (15 versions)——
librecad2.1.3-1.3 ... 2.2.0.2-3 (8 versions)——
Debian:12(4)
PackageVulnerable rangeFixed inDependents
cloudcompare—2.11.3-7.1—
dxflib—3.26.4-1—
horizon-eda2.4.0-1 ... 2.6.0-2.3 (8 versions)——
librecad2.2.0-1, 2.2.0.2-1, 2.2.0.2-2, 2.2.0.2-3——
Debian:13(4)
PackageVulnerable rangeFixed inDependents
cloudcompare—2.11.3-7.1—
dxflib—3.26.4-1—
horizon-eda2.6.0-2.2, 2.6.0-2.3——
librecad2.2.0.2-1, 2.2.0.2-2, 2.2.0.2-3——
Debian:14(4)
PackageVulnerable rangeFixed inDependents
cloudcompare—2.11.3-7.1—
dxflib—3.26.4-1—
horizon-eda2.6.0-2.2, 2.6.0-2.3——
librecad2.2.0.2-1, 2.2.0.2-2, 2.2.0.2-3——
Debian:9(1)
PackageVulnerable rangeFixed inDependents
librecad2.1.2-1, 2.1.2-1+deb9u1, 2.1.2-1+deb9u2, 2.1.2-1+deb9u32.1.2-1+deb9u4—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 29× 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 143 total refreshes for this CVE.

  1. 2026-09-07 15:58 UTCEPSS rescore
  2. 2026-09-06 13:44 UTCEPSS rescore
  3. 2026-09-06 13:44 UTCEPSS rescore
  4. 2026-09-06 08:30 UTCOSV refresh
  5. 2026-09-05 15:25 UTCEPSS rescore
  6. 2026-09-04 13:57 UTCEPSS rescore
  7. 2026-09-04 05:03 UTCEPSS rescore
  8. 2026-09-02 14:08 UTCEPSS rescore
  9. 2026-09-01 13:50 UTCEPSS rescore
  10. 2026-09-01 03:32 UTCEPSS rescore
  11. 2026-08-30 19:14 UTCEPSS rescore
  12. 2026-08-30 01:19 UTCEPSS rescore
  13. 2026-08-28 21:37 UTCEPSS rescore
  14. 2026-08-27 14:22 UTCEPSS rescore
  15. 2026-08-26 14:42 UTCEPSS rescore
  16. 2026-08-25 13:45 UTCEPSS rescore
  17. 2026-08-23 00:16 UTCEPSS rescore
  18. 2026-08-21 23:46 UTCEPSS rescore
  19. 2026-08-20 22:52 UTCEPSS rescore
  20. 2026-08-19 19:04 UTCOSV refresh
  21. 2026-08-19 17:01 UTCEPSS rescore
  22. 2026-08-18 13:45 UTCEPSS rescore
  23. 2026-08-17 13:43 UTCEPSS rescore
  24. 2026-08-16 14:52 UTCEPSS rescore
  25. 2026-08-16 02:11 UTCEPSS rescore
Show 75 more
  1. 2026-08-15 01:27 UTCEPSS rescore
  2. 2026-08-13 21:57 UTCEPSS rescore
  3. 2026-08-12 13:47 UTCEPSS rescore
  4. 2026-08-11 13:38 UTCEPSS rescore
  5. 2026-08-08 16:33 UTCEPSS rescore
  6. 2026-08-07 16:23 UTCEPSS rescore
  7. 2026-08-06 13:43 UTCEPSS rescore
  8. 2026-08-05 19:14 UTCEPSS rescore
  9. 2026-08-04 15:06 UTCEPSS rescore
  10. 2026-08-04 14:29 UTCOSV refresh
  11. 2026-08-04 10:34 UTCEPSS rescore
  12. 2026-08-03 10:32 UTCEPSS rescore
  13. 2026-08-02 02:24 UTCEPSS rescore
  14. 2026-08-01 04:12 UTCEPSS rescore
  15. 2026-07-30 16:25 UTCEPSS rescore
  16. 2026-07-30 01:27 UTCEPSS rescore
  17. 2026-07-30 01:27 UTCEPSS rescore
  18. 2026-07-26 14:52 UTCEPSS rescore
  19. 2026-07-25 14:15 UTCEPSS rescore
  20. 2026-07-24 14:15 UTCEPSS rescore
  21. 2026-07-23 14:15 UTCEPSS rescore
  22. 2026-07-23 01:57 UTCEG score recompute
  23. 2026-07-22 22:43 UTCEG score recompute
  24. 2026-07-22 14:05 UTCEPSS rescore
  25. 2026-07-21 15:22 UTCEPSS rescore
  26. 2026-07-21 15:22 UTCEPSS rescore
  27. 2026-07-20 17:04 UTCEPSS rescore
  28. 2026-07-19 14:28 UTCEPSS rescore
  29. 2026-07-19 02:26 UTCEPSS rescore
  30. 2026-07-18 12:29 UTCOSV refresh
  31. 2026-07-18 10:02 UTCEPSS rescore
  32. 2026-07-16 17:00 UTCEPSS rescore
  33. 2026-07-15 16:55 UTCEPSS rescore
  34. 2026-07-15 16:55 UTCEPSS rescore
  35. 2026-07-15 01:57 UTCEPSS rescore
  36. 2026-07-13 22:27 UTCEPSS rescore
  37. 2026-07-13 22:27 UTCEPSS rescore
  38. 2026-07-13 06:10 UTCEPSS rescore
  39. 2026-07-13 06:10 UTCEPSS rescore
  40. 2026-07-12 05:44 UTCEPSS rescore
  41. 2026-07-12 05:44 UTCEPSS rescore
  42. 2026-07-11 08:25 UTCEPSS rescore
  43. 2026-07-09 19:07 UTCEPSS rescore
  44. 2026-07-08 15:12 UTCEPSS rescore
  45. 2026-07-07 13:43 UTCEPSS rescore
  46. 2026-07-06 16:25 UTCEPSS rescore
  47. 2026-07-06 02:21 UTCEPSS rescore
  48. 2026-07-06 02:21 UTCEPSS rescore
  49. 2026-07-05 02:28 UTCEPSS rescore
  50. 2026-07-05 02:28 UTCEPSS rescore
  51. 2026-07-04 06:29 UTCEPSS rescore
  52. 2026-07-04 06:29 UTCEPSS rescore
  53. 2026-07-02 16:57 UTCEPSS rescore
  54. 2026-07-01 15:03 UTCEPSS rescore
  55. 2026-06-30 23:20 UTCEPSS rescore
  56. 2026-06-30 23:20 UTCEPSS rescore
  57. 2026-06-30 15:00 UTCOSV refresh
  58. 2026-06-29 14:04 UTCEPSS rescore
  59. 2026-06-29 14:04 UTCEPSS rescore
  60. 2026-06-28 14:05 UTCEPSS rescore
  61. 2026-06-28 04:54 UTCEPSS rescore
  62. 2026-06-28 04:54 UTCEPSS rescore
  63. 2026-06-27 03:06 UTCEPSS rescore
  64. 2026-06-27 03:06 UTCEPSS rescore
  65. 2026-06-25 13:48 UTCEPSS rescore
  66. 2026-06-25 13:48 UTCEPSS rescore
  67. 2026-06-24 14:03 UTCEPSS rescore
  68. 2026-06-24 14:03 UTCEPSS rescore
  69. 2026-06-22 14:24 UTCEPSS rescore
  70. 2026-06-22 14:23 UTCEPSS rescore
  71. 2026-06-21 01:58 UTCEPSS rescore
  72. 2026-06-21 01:57 UTCEPSS rescore
  73. 2026-06-19 19:24 UTCEPSS rescore
  74. 2026-06-19 19:24 UTCEPSS rescore
  75. 2026-06-18 17:51 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2021-21897?
CVE-2021-21897 is a high vulnerability published on September 8, 2021. A code execution vulnerability exists in the DL_Dxf::handleLWPolylineData functionality of Ribbonsoft dxflib 3.17.0. A specially-crafted .dxf file can lead to a heap buffer overflow. An attacker can provide a malicious file to trigger this vulnerability.
When was CVE-2021-21897 disclosed?
CVE-2021-21897 was first published in the National Vulnerability Database on September 8, 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-2021-21897 actively exploited?
CVE-2021-21897 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3% probability of exploitation in the next 30 days, which ranks it in the top 14.0% of all scored CVEs.
What is the CVSS score of CVE-2021-21897?
CVE-2021-21897 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2021-21897?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-21897, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2021-21897

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