CVE-2021-44961

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2022-03-02. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
5.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 1%CVSS: 5.5Exploit: NoneExposed: 0

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

A memory leakage flaw exists in the class PerimeterGenerator of Slic3r libslic3r 1.3.0 and Master Commit b1a5500. Specially crafted stl files can exhaust available memory. An attacker can provide malicious files to trigger this vulnerability.

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
30(Track)
EG Risk 30/100SSVC: 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
Severity55% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
49.5%
KEV
Not listed

Published

March 1, 2022

Last Modified

July 9, 2026

Advisory Details (1)

Auto-updated Jul 9, 2026
No patch confirmed yet.
generic

Slic3r libslic3r PerimeterGenerator Memory Leakage Vulnerability - HackMD

https://hackmd.io/nDT_UKLyRQendxDwil9A4w

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 55× 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 115 total refreshes for this CVE.

  1. 2026-07-24 14:15 UTCEPSS rescore
  2. 2026-07-23 14:16 UTCEPSS rescore
  3. 2026-07-23 02:05 UTCEG score recompute
  4. 2026-07-22 22:52 UTCEG score recompute
  5. 2026-07-22 14:06 UTCEPSS rescore
  6. 2026-07-21 15:22 UTCEPSS rescore
  7. 2026-07-21 15:22 UTCEPSS rescore
  8. 2026-07-20 17:05 UTCEPSS rescore
  9. 2026-07-19 14:29 UTCEPSS rescore
  10. 2026-07-19 02:27 UTCEPSS rescore
  11. 2026-07-18 10:02 UTCEPSS rescore
  12. 2026-07-18 10:02 UTCEPSS rescore
  13. 2026-07-17 21:29 UTCOSV refresh
  14. 2026-07-16 17:00 UTCEPSS rescore
  15. 2026-07-16 17:00 UTCEPSS rescore
  16. 2026-07-15 16:55 UTCEPSS rescore
  17. 2026-07-15 16:55 UTCEPSS rescore
  18. 2026-07-15 01:58 UTCEPSS rescore
  19. 2026-07-13 22:27 UTCEPSS rescore
  20. 2026-07-13 22:27 UTCEPSS rescore
  21. 2026-07-13 06:11 UTCEPSS rescore
  22. 2026-07-13 06:11 UTCEPSS rescore
  23. 2026-07-12 05:44 UTCEPSS rescore
  24. 2026-07-11 08:25 UTCEPSS rescore
  25. 2026-07-11 08:25 UTCEPSS rescore
Show 75 more
  1. 2026-07-09 19:07 UTCEPSS rescore
  2. 2026-07-09 02:55 UTCNVD updateCVSS v3 → 5.5 · severity → MEDIUM
  3. 2026-07-09 01:24 UTCMITRE cvelistV5
  4. 2026-07-08 15:12 UTCEPSS rescore
  5. 2026-07-07 13:43 UTCEPSS rescore
  6. 2026-07-06 16:25 UTCEPSS rescore
  7. 2026-07-06 16:25 UTCEPSS rescore
  8. 2026-07-06 02:21 UTCEPSS rescore
  9. 2026-07-06 02:21 UTCEPSS rescore
  10. 2026-07-05 17:59 UTCNVD updateCVSS v3 → 5.5 · severity → MEDIUM
  11. 2026-07-05 16:09 UTCMITRE cvelistV5
  12. 2026-07-05 02:28 UTCEPSS rescore
  13. 2026-07-05 02:28 UTCEPSS rescore
  14. 2026-07-05 00:28 UTCNVD updateCVSS v3 → 5.5 · severity → MEDIUM
  15. 2026-07-04 23:57 UTCMITRE cvelistV5
  16. 2026-07-04 06:29 UTCEPSS rescore
  17. 2026-07-04 06:29 UTCEPSS rescore
  18. 2026-07-02 16:57 UTCEPSS rescore
  19. 2026-07-01 15:04 UTCEPSS rescore
  20. 2026-06-30 23:20 UTCEPSS rescore
  21. 2026-06-30 23:20 UTCEPSS rescore
  22. 2026-06-29 19:23 UTCOSV refresh
  23. 2026-06-29 14:04 UTCEPSS rescore
  24. 2026-06-28 14:05 UTCEPSS rescore
  25. 2026-06-28 04:54 UTCEPSS rescore
  26. 2026-06-28 04:54 UTCEPSS rescore
  27. 2026-06-27 03:06 UTCEPSS rescore
  28. 2026-06-27 03:06 UTCEPSS rescore
  29. 2026-06-25 13:48 UTCEPSS rescore
  30. 2026-06-25 13:48 UTCEPSS rescore
  31. 2026-06-24 14:03 UTCEPSS rescore
  32. 2026-06-24 14:03 UTCEPSS rescore
  33. 2026-06-23 21:31 UTCEPSS rescore
  34. 2026-06-23 21:31 UTCEPSS rescore
  35. 2026-06-22 14:24 UTCEPSS rescore
  36. 2026-06-21 14:55 UTCEPSS rescore
  37. 2026-06-21 01:58 UTCEPSS rescore
  38. 2026-06-21 01:58 UTCEPSS rescore
  39. 2026-06-19 19:24 UTCEPSS rescore
  40. 2026-06-19 19:24 UTCEPSS rescore
  41. 2026-06-18 17:51 UTCEPSS rescore
  42. 2026-06-18 17:51 UTCEPSS rescore
  43. 2026-06-17 17:51 UTCEPSS rescore
  44. 2026-06-17 17:51 UTCEPSS rescore
  45. 2026-06-17 17:51 UTCEPSS rescore
  46. 2026-06-16 17:51 UTCEPSS rescore
  47. 2026-06-16 17:51 UTCEPSS rescore
  48. 2026-06-15 17:46 UTCEPSS rescore
  49. 2026-06-14 23:15 UTCEPSS rescore
  50. 2026-06-14 23:15 UTCEPSS rescore
  51. 2026-06-13 22:58 UTCEPSS rescore
  52. 2026-06-13 22:58 UTCEPSS rescore
  53. 2026-06-12 23:10 UTCEPSS rescore
  54. 2026-06-12 08:06 UTCOSV refresh
  55. 2026-06-11 13:58 UTCEPSS rescore
  56. 2026-06-11 13:58 UTCEPSS rescore
  57. 2026-06-10 22:16 UTCEPSS rescore
  58. 2026-06-10 22:16 UTCEPSS rescore
  59. 2026-06-10 13:20 UTCEPSS rescore
  60. 2026-06-08 14:15 UTCEPSS rescore
  61. 2026-06-08 14:15 UTCEPSS rescore
  62. 2026-06-07 15:23 UTCEPSS rescore
  63. 2026-06-07 15:23 UTCEPSS rescore
  64. 2026-06-06 13:46 UTCEPSS rescore
  65. 2026-06-06 13:46 UTCEPSS rescore
  66. 2026-06-05 22:45 UTCEPSS rescore
  67. 2026-06-05 06:09 UTCEPSS rescore
  68. 2026-06-05 06:09 UTCEPSS rescore
  69. 2026-06-04 13:10 UTCEPSS rescore
  70. 2026-06-04 13:10 UTCEPSS rescore
  71. 2026-06-02 20:11 UTCEPSS rescore
  72. 2026-06-02 20:11 UTCEPSS rescore
  73. 2026-06-01 13:50 UTCEPSS rescore
  74. 2026-06-01 13:50 UTCEPSS rescore
  75. 2026-05-31 22:29 UTCEPSS rescore

Frequently asked(5)

What is CVE-2021-44961?
CVE-2021-44961 is a medium vulnerability published on March 1, 2022. A memory leakage flaw exists in the class PerimeterGenerator of Slic3r libslic3r 1.3.0 and Master Commit b1a5500. Specially crafted stl files can exhaust available memory. An attacker can provide malicious files to trigger this vulnerability.
When was CVE-2021-44961 disclosed?
CVE-2021-44961 was first published in the National Vulnerability Database on March 1, 2022, with the most recent update on July 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-44961 actively exploited?
CVE-2021-44961 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 49.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2021-44961?
CVE-2021-44961 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2021-44961?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-44961, 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

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