CVE-2026-6645

HIGHPre-NVD 7.37.3
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 93% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this week
7.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.3Exploit: None knownExposed: 0

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

An insecure process execution vulnerability exists in the pc-printer-updater.exe component of the PaperCut Print Deploy Client for Windows. The application, which typically operates with high-level system privileges, attempts to perform an internal validation check by invoking a secondary system utility using an unqualified file reference.

Because the application does not specify an absolute path to this utility, it relies on the operating system's default search order to locate the executable. Under specific conditions, a local attacker with the ability to modify directories within the system's search path could plant a malicious binary that mimics the expected utility. This could result in the malicious code being executed with SYSTEM privileges, leading to a full compromise of the affected host.

CVSS v3
7.3
EG Score
7.3(medium)
EG Risk
33(Track)
EG Risk 33/100SSVC: 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
Severity73% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
7%
KEV
Not listed

Published

June 22, 2026

Last Modified

June 23, 2026

Advisory Details (1)

Auto-updated Jun 22, 2026
No patch confirmed yet.
generic

PaperCut NG/MF Security Bulletin (June 2026) | PaperCut

https://www.papercut.com/kb/Main/papercut-ng-mf-security-bulletin-june-2026/

Vendor Advisories for CVE-2026-6645(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 18× in last 7d / 100× 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 198 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-6645?
CVE-2026-6645 is a high vulnerability published on June 22, 2026. An insecure process execution vulnerability exists in the pc-printer-updater.exe component of the PaperCut Print Deploy Client for Windows. The application, which typically operates with high-level system privileges, attempts to perform an internal validation check by invoking a secondary system…
When was CVE-2026-6645 disclosed?
CVE-2026-6645 was first published in the National Vulnerability Database on June 22, 2026, with the most recent update on June 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-6645 actively exploited?
CVE-2026-6645 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 92.6% of all scored CVEs.
What is the CVSS score of CVE-2026-6645?
CVE-2026-6645 has a CVSS v3 base score of 7.3 (NVD).
How do I remediate CVE-2026-6645?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-6645, 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

Explore the affected products and dependency analysis for CVE-2026-6645

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