CVE-2026-57019

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory (severity: HIGH) published 2026-07-10. a secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 0

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

An Improper Validation of Specified Quantity in Input vulnerability in the Packet Forwarding Engine (pfe) of Juniper Networks Junos OS on MX Series allows an unauthenticated, adjacent attacker to cause a Denial-of-Service (DoS).

When a specific packet is received from device in the same broadcast domain, an affected system calculates the packet size incorrectly. This causes further packet processing to fail, which triggers an FPC major error, resulting in a FPC reset impacting traffic until the FPC has automatically recovered.

Affected scenarios are: MAP-T, or non-IP traffic encapsulated in IP (e.g. MPLS over GRE).

When this issue happens the following logs can be observed:

fpc<#> CMError: /fpc/0/pfe/0/cm/0/MQSS(0)/0/MQSS_CMERROR_LI_INT_REG_UNROLL_TAIL_LENGTH_OVF (0x2205eb), scope: pfe, category: functional, severity: major, module: MQSS(0), type: LI: Unroll TAIL length overflow, oc_category: default fpc<#> Performing action reset-fru for error /fpc/0/pfe/0/cm/0/MQSS(0)/0/MQSS_CMERROR_LI_INT_REG_UNROLL_TAIL_LENGTH_OVF (0x2205eb) in module: MQSS(0) with scope: pfe category: functional level: major, oc_category: default

This issue affects Junos OS on MX Series:

* all versions before 23.2R2-S6, * 23.4 versions before 23.4R2-S7, * 24.2 versions before 24.2R2-S4, * 24.4 versions before 24.4R2-S4, * 25.2 versions before 25.2R2.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
19%
KEV
Not listed

Published

July 9, 2026

Last Modified

July 13, 2026

Advisory Details (1)

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

CEC Juniper Community

https://supportportal.juniper.net/JSA110079

Vendor Advisories for CVE-2026-57019(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 15× in last 7d / 77× 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. 2026-08-25 13:49 UTCEPSS rescore
  2. 2026-08-25 11:09 UTCEG score recompute
  3. 2026-08-25 11:09 UTCGHSA enrichment
  4. 2026-08-24 09:34 UTCEG score recompute
  5. 2026-08-24 09:34 UTCGHSA enrichment
  6. 2026-08-23 06:25 UTCGHSA enrichment
  7. 2026-08-22 05:06 UTCEG score recompute
  8. 2026-08-22 05:06 UTCGHSA enrichment
  9. 2026-08-21 23:49 UTCEPSS rescore
  10. 2026-08-21 03:48 UTCEG score recompute
  11. 2026-08-21 03:47 UTCGHSA enrichment
  12. 2026-08-20 22:55 UTCEPSS rescore
  13. 2026-08-20 01:39 UTCEG score recompute
  14. 2026-08-20 01:39 UTCGHSA enrichment
  15. 2026-08-19 17:04 UTCEPSS rescore
  16. 2026-08-18 23:47 UTCEG score recompute
  17. 2026-08-18 23:47 UTCGHSA enrichment
  18. 2026-08-18 13:48 UTCEPSS rescore
  19. 2026-08-17 22:27 UTCEG score recompute
  20. 2026-08-17 22:27 UTCGHSA enrichment
  21. 2026-08-17 13:47 UTCEPSS rescore
  22. 2026-08-16 21:03 UTCEG score recompute
  23. 2026-08-16 21:03 UTCGHSA enrichment
  24. 2026-08-16 14:56 UTCEPSS rescore
  25. 2026-08-16 02:14 UTCEPSS rescore
Show 75 more
  1. 2026-08-15 19:45 UTCEG score recompute
  2. 2026-08-15 19:45 UTCGHSA enrichment
  3. 2026-08-15 01:30 UTCEPSS rescore
  4. 2026-08-14 18:26 UTCEG score recompute
  5. 2026-08-14 18:26 UTCGHSA enrichment
  6. 2026-08-13 22:00 UTCEPSS rescore
  7. 2026-08-13 17:07 UTCGHSA enrichment
  8. 2026-08-12 15:46 UTCEG score recompute
  9. 2026-08-12 15:46 UTCGHSA enrichment
  10. 2026-08-12 13:51 UTCEPSS rescore
  11. 2026-08-11 14:28 UTCEG score recompute
  12. 2026-08-11 14:28 UTCGHSA enrichment
  13. 2026-08-11 00:00 UTCEPSS rescore
  14. 2026-08-10 13:09 UTCEG score recompute
  15. 2026-08-10 13:09 UTCGHSA enrichment
  16. 2026-08-09 13:46 UTCEPSS rescore
  17. 2026-08-09 11:51 UTCEG score recompute
  18. 2026-08-09 11:51 UTCGHSA enrichment
  19. 2026-08-08 10:32 UTCEG score recompute
  20. 2026-08-08 10:32 UTCGHSA enrichment
  21. 2026-08-07 09:13 UTCEG score recompute
  22. 2026-08-07 09:13 UTCGHSA enrichment
  23. 2026-08-06 13:47 UTCEPSS rescore
  24. 2026-08-06 07:54 UTCEG score recompute
  25. 2026-08-06 07:54 UTCGHSA enrichment
  26. 2026-08-05 19:17 UTCEPSS rescore
  27. 2026-08-05 06:36 UTCEG score recompute
  28. 2026-08-05 06:35 UTCGHSA enrichment
  29. 2026-08-04 15:10 UTCEPSS rescore
  30. 2026-08-04 10:39 UTCEPSS rescore
  31. 2026-08-04 03:09 UTCEG score recompute
  32. 2026-08-04 03:09 UTCGHSA enrichment
  33. 2026-08-03 10:36 UTCEPSS rescore
  34. 2026-08-03 01:50 UTCEG score recompute
  35. 2026-08-03 01:50 UTCGHSA enrichment
  36. 2026-08-02 02:27 UTCEPSS rescore
  37. 2026-08-02 00:32 UTCEG score recompute
  38. 2026-08-02 00:32 UTCGHSA enrichment
  39. 2026-08-01 04:16 UTCEPSS rescore
  40. 2026-07-31 23:13 UTCGHSA enrichment
  41. 2026-07-30 21:50 UTCEG score recompute
  42. 2026-07-30 21:50 UTCGHSA enrichment
  43. 2026-07-30 16:28 UTCEPSS rescore
  44. 2026-07-30 01:30 UTCEPSS rescore
  45. 2026-07-30 01:30 UTCEPSS rescore
  46. 2026-07-29 18:36 UTCGHSA enrichment
  47. 2026-07-28 17:15 UTCEG score recompute
  48. 2026-07-28 17:15 UTCGHSA enrichment
  49. 2026-07-28 15:37 UTCEPSS rescore
  50. 2026-07-27 15:35 UTCEG score recompute
  51. 2026-07-27 15:35 UTCGHSA enrichment
  52. 2026-07-27 14:14 UTCEPSS rescore
  53. 2026-07-26 14:54 UTCEPSS rescore
  54. 2026-07-26 14:54 UTCEPSS rescore
  55. 2026-07-26 12:16 UTCEG score recompute
  56. 2026-07-26 12:16 UTCGHSA enrichment
  57. 2026-07-25 14:18 UTCEPSS rescore
  58. 2026-07-25 14:18 UTCEPSS rescore
  59. 2026-07-24 14:18 UTCEPSS rescore
  60. 2026-07-24 14:18 UTCEPSS rescore
  61. 2026-07-23 14:18 UTCEPSS rescore
  62. 2026-07-23 03:20 UTCEG score recompute
  63. 2026-07-22 14:08 UTCEPSS rescore
  64. 2026-07-21 15:25 UTCEPSS rescore
  65. 2026-07-20 17:08 UTCEPSS rescore
  66. 2026-07-19 14:31 UTCEPSS rescore
  67. 2026-07-19 14:31 UTCEPSS rescore
  68. 2026-07-19 02:29 UTCEPSS rescore
  69. 2026-07-18 10:04 UTCEPSS rescore
  70. 2026-07-16 17:03 UTCEPSS rescore
  71. 2026-07-16 05:37 UTCGHSA enrichment
  72. 2026-07-15 16:57 UTCEPSS rescore
  73. 2026-07-15 16:57 UTCEPSS rescore
  74. 2026-07-15 04:18 UTCGHSA enrichment
  75. 2026-07-15 02:00 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-57019?
CVE-2026-57019 is a medium vulnerability published on July 9, 2026. An Improper Validation of Specified Quantity in Input vulnerability in the Packet Forwarding Engine (pfe) of Juniper Networks Junos OS on MX Series allows an unauthenticated, adjacent attacker to cause a Denial-of-Service (DoS). When a specific packet is received from device in the same broadcast…
When was CVE-2026-57019 disclosed?
CVE-2026-57019 was first published in the National Vulnerability Database on July 9, 2026, with the most recent update 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-2026-57019 actively exploited?
CVE-2026-57019 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 81.5% of all scored CVEs.
What is the CVSS score of CVE-2026-57019?
CVE-2026-57019 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-57019?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-57019, 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-2026-57019

Explore →

Is Your Infrastructure Affected by CVE-2026-57019?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs