CVE-2026-15520

MEDIUMPre-NVD 5.35.3
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

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, GitHub Security Advisory, a secondary CVSS source
Elevated
5.3EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 5.3Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

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
5.3MEDIUMmedium confidence
EG Risk
40
EG Risk 40/100

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 (value × EchelonGraph’s weight)
Severity53% × 45%
The EG Score, 5.3 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
7th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

July 13, 2026

Last Modified

July 13, 2026

Advisory Details (5)

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

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
Web page

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
Web page

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 11× in last 7d / 33× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 169 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 69 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  2. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  3. 2026-10-12 16:31 UTCEG score recompute
  4. 2026-10-11 20:10 UTCEG score recompute
  5. 2026-10-11 17:22 UTCEG score recompute
  6. 2026-10-11 14:55 UTCEG score recompute
  7. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  8. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  9. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  10. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  11. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  12. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  13. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  14. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  15. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  16. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  17. 2026-10-01 14:48 UTCEG score recompute
  18. 2026-10-01 14:48 UTCGHSA enrichmentGHSA-67vr-6jq3-273m · GitHub severity LOW · GitHub CVSS 5.3
  19. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  20. 2026-09-29 15:20 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  21. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  22. 2026-09-28 09:38 UTCEG score recompute
  23. 2026-09-28 09:38 UTCGHSA enrichmentGHSA-67vr-6jq3-273m · GitHub severity LOW · GitHub CVSS 5.3
  24. 2026-09-27 13:47 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  25. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.2% · 7th percentile
Show 75 more
  1. 2026-09-24 10:17 UTCGHSA enrichmentGHSA-67vr-6jq3-273m · GitHub severity LOW · GitHub CVSS 5.3
  2. 2026-09-23 05:36 UTCEG score recompute
  3. 2026-09-23 05:36 UTCGHSA enrichmentGHSA-67vr-6jq3-273m · GitHub severity LOW · GitHub CVSS 5.3
  4. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  5. 2026-09-18 05:09 UTCEG score recompute
  6. 2026-09-18 05:09 UTCGHSA enrichmentGHSA-67vr-6jq3-273m · GitHub severity LOW · GitHub CVSS 5.3
  7. 2026-09-16 14:07 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  8. 2026-09-16 05:14 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  9. 2026-09-14 10:27 UTCEG score recompute
  10. 2026-09-14 10:27 UTCGHSA enrichmentGHSA-67vr-6jq3-273m · GitHub severity LOW · GitHub CVSS 5.3
  11. 2026-09-13 16:46 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  12. 2026-09-13 08:05 UTCEG score recompute
  13. 2026-09-13 08:05 UTCGHSA enrichmentGHSA-67vr-6jq3-273m · GitHub severity LOW · GitHub CVSS 5.3
  14. 2026-09-12 15:00 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  15. 2026-09-12 01:59 UTCEG score recompute
  16. 2026-09-12 01:59 UTCGHSA enrichmentGHSA-67vr-6jq3-273m · GitHub severity LOW · GitHub CVSS 5.3
  17. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  18. 2026-09-11 09:36 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  19. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  20. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  21. 2026-09-08 02:14 UTCEG score recompute
  22. 2026-09-08 02:14 UTCGHSA enrichmentGHSA-67vr-6jq3-273m · GitHub severity LOW · GitHub CVSS 5.3
  23. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  24. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  25. 2026-09-05 21:32 UTCEG score recompute
  26. 2026-09-05 21:32 UTCGHSA enrichmentGHSA-67vr-6jq3-273m · GitHub severity LOW · GitHub CVSS 5.3
  27. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  28. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  29. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  30. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  31. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  32. 2026-08-30 05:43 UTCEG score recompute
  33. 2026-08-30 05:43 UTCGHSA enrichmentGHSA-67vr-6jq3-273m · GitHub severity LOW · GitHub CVSS 5.3
  34. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  35. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  36. 2026-08-28 02:37 UTCEG score recompute
  37. 2026-08-28 02:37 UTCGHSA enrichmentGHSA-67vr-6jq3-273m · GitHub severity LOW · GitHub CVSS 5.3
  38. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  39. 2026-08-27 00:19 UTCEG score recompute
  40. 2026-08-27 00:19 UTCGHSA enrichmentGHSA-67vr-6jq3-273m · GitHub severity LOW · GitHub CVSS 5.3
  41. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  42. 2026-08-25 14:43 UTCEG score recompute
  43. 2026-08-25 14:43 UTCGHSA enrichmentGHSA-67vr-6jq3-273m · GitHub severity LOW · GitHub CVSS 5.3
  44. 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  45. 2026-08-24 12:49 UTCEG score recompute
  46. 2026-08-24 12:49 UTCGHSA enrichmentGHSA-67vr-6jq3-273m · GitHub severity LOW · GitHub CVSS 5.3
  47. 2026-08-23 11:12 UTCEG score recompute
  48. 2026-08-23 11:12 UTCGHSA enrichmentGHSA-67vr-6jq3-273m · GitHub severity LOW · GitHub CVSS 5.3
  49. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  50. 2026-08-22 09:36 UTCEG score recompute
  51. 2026-08-22 09:36 UTCGHSA enrichmentGHSA-67vr-6jq3-273m · GitHub severity LOW · GitHub CVSS 5.3
  52. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  53. 2026-08-21 07:59 UTCEG score recompute
  54. 2026-08-21 07:59 UTCGHSA enrichmentGHSA-67vr-6jq3-273m · GitHub severity LOW · GitHub CVSS 5.3
  55. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  56. 2026-08-20 06:23 UTCEG score recompute
  57. 2026-08-20 06:23 UTCGHSA enrichmentGHSA-67vr-6jq3-273m · GitHub severity LOW · GitHub CVSS 5.3
  58. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  59. 2026-08-19 04:38 UTCEG score recompute
  60. 2026-08-19 04:38 UTCGHSA enrichmentGHSA-67vr-6jq3-273m · GitHub severity LOW · GitHub CVSS 5.3
  61. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  62. 2026-08-18 02:47 UTCEG score recompute
  63. 2026-08-18 02:47 UTCGHSA enrichmentGHSA-67vr-6jq3-273m · GitHub severity LOW · GitHub CVSS 5.3
  64. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  65. 2026-08-17 00:08 UTCEG score recompute
  66. 2026-08-17 00:07 UTCGHSA enrichmentGHSA-67vr-6jq3-273m · GitHub severity LOW · GitHub CVSS 5.3
  67. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  68. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  69. 2026-08-15 22:31 UTCEG score recompute
  70. 2026-08-15 22:31 UTCGHSA enrichmentGHSA-67vr-6jq3-273m · GitHub severity LOW · GitHub CVSS 5.3
  71. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  72. 2026-08-14 20:54 UTCEG score recompute
  73. 2026-08-14 20:54 UTCGHSA enrichmentGHSA-67vr-6jq3-273m · GitHub severity LOW · GitHub CVSS 5.3
  74. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  75. 2026-08-13 19:17 UTCGHSA enrichmentGHSA-67vr-6jq3-273m · GitHub severity LOW · GitHub CVSS 5.3

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-15520?
CVE-2026-15520 is a medium-severity vulnerability; its CVE record was 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 the CVE record for CVE-2026-15520 published?
The CVE record for CVE-2026-15520 was published on July 13, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of July 13, 2026; the record at its source may have been updated since.
Is CVE-2026-15520 actively exploited?
CVE-2026-15520 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (7th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-15520?
CVE-2026-15520 has a CVSS base score of 5.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-15520?
A fix for CVE-2026-15520 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-15520 are linked in the Vendor Advisories panel on this page.

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