CVE-2026-37458

MEDIUMNVD 6.56.5
EchelonGraph scoreMEDIUM confidence

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

Score 6.5 from GitHub Security Advisory published 2026-05-04. NVD baseline CVSS 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
6.5EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 6.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Missing input validation in the MP_REACH_NLRI component of FRRouting (FRR) stable/10.0 to stable/10.6 allows authenticated attackers to cause a Denial of Service (DoS) via supplying a crafted UPDATE message.

CVSS v3
6.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
29
EG Risk 29/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity65% × 45%
Impact severity (EG Severity): CVSS 6.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (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
0.4%
EPSS %ILE
36th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (6.5): severity, escalated by confirmed exploitation. This CVE's 6.5 is its impact severity (EG Severity), not escalated.

EG Severity
6.5 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-17). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

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

Exploitation none (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

May 4, 2026

Last Modified

May 11, 2026

Advisory Details (2)

Auto-updated May 5, 2026
Patch available.
Web page

vulnerability-research/advisories/CVE-2026-36365.md at main · mertsatilmaz/vulnerability-research · GitHub

https://github.com/mertsatilmaz/vulnerability-research/blob/main/advisories/CVE-2026-36365.md
Web page

bgpd: Validate MP_REACH_NLRI attribute against incorrect next-hop · FRRouting/frr@8102a8a · GitHub

https://github.com/FRRouting/frr/commit/8102a8aeceb9f86fdfe1f80cd77080522bab69c8

Vendor Advisories for CVE-2026-37458(1)

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

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntufrr-snmp (10.4.1-3ubuntu1.4) @ questing2026-08-23ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
frr10.0-0.1 ... 9.1-0.1 (59 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
frr8.4.2-1, 8.4.4-1, 8.4.4-1.1~deb12u1
  • every version up to 8.4.4-1.1~deb12u2: fixed in 8.4.4-1.1~deb12u2
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
frr10.3-3
  • every version up to 10.3-3+deb13u1: fixed in 10.3-3+deb13u1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
frr10.3-3 ... 10.6.0-1 (19 versions)
  • every version up to 10.6.0-2: fixed in 10.6.0-2
—

Weakness Classification(1)

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

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 9× in last 7d / 31× 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 99 of 242 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. 1 repeat row among the latest 100 is merged into the row it repeats. The 143 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  2. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  3. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  4. 2026-10-18 03:44 UTCEG score recompute
  5. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  6. 2026-10-16 16:41 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  7. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  8. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  9. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  10. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  11. 2026-10-12 16:11 UTCEG score recompute
  12. 2026-10-11 19:53 UTCEG score recompute
  13. 2026-10-11 17:06 UTCEG score recompute
  14. 2026-10-11 14:33 UTCEG score recompute
  15. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  16. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  17. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  18. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  19. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  20. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  21. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  22. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  23. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  24. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  25. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 35th percentile
Show 74 more
  1. 2026-09-30 11:17 UTCOSV refresh
  2. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  3. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  4. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  5. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  6. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  7. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  8. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  9. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  10. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  11. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  12. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  13. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  14. 2026-09-11 18:10 UTCOSV refresh
  15. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  16. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  17. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  18. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  19. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  20. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  21. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  22. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  23. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  24. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  25. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  26. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  27. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  28. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  29. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  30. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  31. 2026-08-23 21:34 UTCEG score recompute
  32. 2026-08-23 21:34 UTCVendor advisory
  33. 2026-08-23 21:34 UTCGHSA enrichmentGHSA-m357-6hwr-7w53 · GitHub CVSS 6.5
  34. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  35. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  36. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  37. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  38. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  39. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  40. 2026-08-17 13:12 UTCEG score recompute
  41. 2026-08-17 13:12 UTCVendor advisory
  42. 2026-08-17 13:12 UTCGHSA enrichmentGHSA-m357-6hwr-7w53 · GitHub CVSS 6.5
  43. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  44. 2026-08-16 05:04 UTCEG score recompute
  45. 2026-08-16 05:04 UTCVendor advisory
  46. 2026-08-16 05:04 UTCGHSA enrichmentGHSA-m357-6hwr-7w53 · GitHub CVSS 6.5
  47. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  48. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  49. 2026-08-14 03:38 UTCEG score recompute
  50. 2026-08-14 03:38 UTCVendor advisory
  51. 2026-08-14 03:38 UTCGHSA enrichmentGHSA-m357-6hwr-7w53 · GitHub CVSS 6.5
  52. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  53. 2026-08-12 17:17 UTCEG score recompute
  54. 2026-08-12 17:17 UTCVendor advisory
  55. 2026-08-12 17:17 UTCGHSA enrichmentGHSA-m357-6hwr-7w53 · GitHub CVSS 6.5
  56. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  57. 2026-08-11 02:46 UTCEG score recompute
  58. 2026-08-11 02:46 UTCVendor advisory
  59. 2026-08-11 02:46 UTCGHSA enrichmentGHSA-m357-6hwr-7w53 · GitHub CVSS 6.5
  60. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  61. 2026-08-10 02:45 UTCEG score recompute
  62. 2026-08-10 02:45 UTCVendor advisory
  63. 2026-08-10 02:45 UTCGHSA enrichmentGHSA-m357-6hwr-7w53 · GitHub CVSS 6.5
  64. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  65. 2026-08-09 02:45 UTCEG score recompute
  66. 2026-08-09 02:45 UTCVendor advisory
  67. 2026-08-09 02:45 UTCGHSA enrichmentGHSA-m357-6hwr-7w53 · GitHub CVSS 6.5
  68. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  69. 2026-08-08 02:17 UTCEG score recompute
  70. 2026-08-08 02:17 UTCVendor advisory
  71. 2026-08-08 02:17 UTCGHSA enrichmentGHSA-m357-6hwr-7w53 · GitHub CVSS 6.5
  72. 2026-08-07 02:16 UTCEG score recompute
  73. 2026-08-07 02:16 UTCVendor advisory
  74. 2026-08-07 02:16 UTCGHSA enrichmentGHSA-m357-6hwr-7w53 · GitHub CVSS 6.5

Frequently asked(5)

What is CVE-2026-37458?
CVE-2026-37458 is a medium-severity vulnerability; its CVE record was published on May 4, 2026. Missing input validation in the MPREACHNLRI component of FRRouting (FRR) stable/10.0 to stable/10.6 allows authenticated attackers to cause a Denial of Service (DoS) via supplying a crafted UPDATE message.
When was the CVE record for CVE-2026-37458 published?
The CVE record for CVE-2026-37458 was published on May 4, 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 May 11, 2026; the record at its source may have been updated since.
Is CVE-2026-37458 actively exploited?
CVE-2026-37458 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (36th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-37458?
CVE-2026-37458 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-37458?
A fix for CVE-2026-37458 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-37458 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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