CVE-2026-15520

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

Score 5.3 from GitHub Security Advisory (severity: LOW) published 2026-07-13. a secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: Elevated riskExposed: 0

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

A vulnerability was determined in GNU LibreDWG 0.13.4-154-g0b573035. This impacts the function decompress_R2004_section of the file src/decode.c of the component R2004 Section Decompression. Executing a manipulation can lead to heap-based buffer overflow. The attack requires local access. The exploit has been publicly disclosed and may be utilized. Upgrading to version 0.14.8396 will fix this issue. This patch is called 3d0f9fc2eddbd6579c99af3111c37c98f03475d0. You should upgrade the affected component.

CVSS v3
5.3
EG Score
5.3(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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
Severity53% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
8%
KEV
Not listed

Published

July 13, 2026

Last Modified

July 13, 2026

Advisory Details (5)

Auto-updated Jul 13, 2026
Patch available. Sources: github_commit, github_release.
generic

The GNU Operating System and the Free Software Movement

https://www.gnu.org/
github_release Patch Available

0.14.8396

Patch available: LibreDWG/libredwg 0.14.8396 (pre-release)

https://github.com/LibreDWG/libredwg/releases/tag/0.14.8396
github_commit

commit 3d0f9fc2eddb (LibreDWG/libredwg)

Fix landed in LibreDWG/libredwg commit 3d0f9fc2eddb — awaiting tagged release

https://github.com/LibreDWG/libredwg/commit/3d0f9fc2eddbd6579c99af3111c37c98f03475d0
generic

CVE-Repos/libredwg/libredwg_0b57303_heap_overflow_decompress_R2004_section.dwg at main · HackC0der/CVE-Repos · GitHub

https://github.com/HackC0der/CVE-Repos/blob/main/libredwg/libredwg_0b57303_heap_overflow_decompress_R2004_section.dwg
generic

Heap-buffer-overflow WRITE in decompress_R2004_section at decode.c:1295 (libredwg main branch @0b57303) · Issue #1251 · LibreDWG/libredwg · GitHub

https://github.com/LibreDWG/libredwg/issues/1251

Vendor Advisories for CVE-2026-15520(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 17× in last 7d / 79× 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 113 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-15520?
CVE-2026-15520 is a medium vulnerability published on July 13, 2026. A vulnerability was determined in GNU LibreDWG 0.13.4-154-g0b573035. This impacts the function decompressR2004section of the file src/decode.c of the component R2004 Section Decompression. Executing a manipulation can lead to heap-based buffer overflow. The attack requires local access. The exploit…
When was CVE-2026-15520 disclosed?
CVE-2026-15520 was first published in the National Vulnerability Database on July 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-15520 actively exploited?
CVE-2026-15520 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 91.9% of all scored CVEs.
What is the CVSS score of CVE-2026-15520?
CVE-2026-15520 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-15520?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-15520, 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.

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