CVE-2020-36957

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-01-26. the CNA's CVSS baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
Elevated
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.8Exploit: NoneExposed: 0

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

PDF Complete 3.5.310.2002 contains an unquoted service path vulnerability in its pdfsvc.exe service configuration. Attackers can exploit the unquoted path to inject and execute malicious code with elevated LocalSystem privileges.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
51(Track*)
EG Risk 51/100SSVC: 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
Severity78% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS
2.8%
KEV
Not listed

Published

January 26, 2026

Last Modified

July 15, 2026

Advisory Details (2)

Auto-updated Jul 15, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

PDF Complete 3.5.310.2002 - 'pdfsvc.exe' Unquoted Service Path | Advisories | VulnCheck

https://www.vulncheck.com/advisories/pdf-complete-pdfsvcexe-unquoted-service-path
generic🟡 PoC Available

PDF Complete 3.5.310.2002 - 'pdfsvc.exe' Unquoted Service Path - Windows local Exploit

https://www.exploit-db.com/exploits/49226

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 39× 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 127 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2020-36957?
CVE-2020-36957 is a high vulnerability published on January 26, 2026. PDF Complete 3.5.310.2002 contains an unquoted service path vulnerability in its pdfsvc.exe service configuration. Attackers can exploit the unquoted path to inject and execute malicious code with elevated LocalSystem privileges.
When was CVE-2020-36957 disclosed?
CVE-2020-36957 was first published in the National Vulnerability Database on January 26, 2026, with the most recent update on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-36957 actively exploited?
CVE-2020-36957 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2020-36957?
CVE-2020-36957 has a CVSS v4.0 base score of 7.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2020-36957?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-36957, 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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