CVE-2026-33801

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreHIGH confidence

Score 6.5 from GitHub Security Advisory (severity: HIGH) published 2026-07-09. a secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
6.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.5Exploit: NoneExposed: 0

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

An Improper Check for Unusual or Exceptional Conditions vulnerability in the routing protocol daemon (RPD) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent, unauthenticated attacker sending a specific BGP update over an established BGP session to cause a Denial-of-Service (DoS).

Upon receipt of a specifically malformed non-inet/inet6 unicast BGP update, an RPD crash and restart is triggered, which will cause a complete service outage until routing has reconverged. The rpd crash occurs before the update can be readvertised, so there is no downstream propagation.

This issue affects:

* Junos OS versions 25.2 before 25.2R2;

* Junos OS Evolved versions 25.2 before 25.2R2-EVO.

This issue doesn't affect Junos OS versions before 25.2R1 nor Junos OS Evolved versions before 25.2R1-EVO.

CVSS v3
6.5
EG Score
6.5(high)
EPSS
20.0%
KEV
Not listed

Published

July 9, 2026

Last Modified

July 10, 2026

Advisory Details (1)

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

CEC Juniper Community

https://supportportal.juniper.net/JSA110076

Vendor Advisories for CVE-2026-33801(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 8× in last 7d / 8× 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.

  1. 2026-07-12 05:46 UTCEPSS rescore
  2. 2026-07-11 19:44 UTCEG score recompute
  3. 2026-07-11 19:44 UTCGHSA enrichment
  4. 2026-07-11 08:27 UTCEPSS rescore
  5. 2026-07-10 20:25 UTCEG score recompute
  6. 2026-07-10 20:25 UTCGHSA enrichment
  7. 2026-07-09 21:05 UTCEG score recompute
  8. 2026-07-09 21:05 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-33801?
CVE-2026-33801 is a medium vulnerability published on July 9, 2026. An Improper Check for Unusual or Exceptional Conditions vulnerability in the routing protocol daemon (RPD) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent, unauthenticated attacker sending a specific BGP update over an established BGP session to cause a Denial-of-Service (DoS).…
When was CVE-2026-33801 disclosed?
CVE-2026-33801 was first published in the National Vulnerability Database on July 9, 2026, with the most recent update on July 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-33801 actively exploited?
CVE-2026-33801 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 20.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-33801?
CVE-2026-33801 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-33801?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-33801, 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

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