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CVE record · CVE-2026-33797

Junos OS and Junos OS Evolved: An attacker sending a specific genuine BGP packet causes a BGP reset

CVSS 7.1 HighEPSS 0.0017 · 5th percentile

Published by the CVE Program (CNA: juniper) at 9 Apr 2026, 21:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
VendorProductVersions
Juniper Networks Junos OS
  • affected 25.2 to before 25.2R2 semver
  • unaffected before 25.2R1 semver
Other versions: unaffected
Juniper Networks Junos OS Evolved
  • affected 25.2 to before 25.2R2-EVO semver
  • unaffected before 25.2R1-EVO semver
Other versions: unaffected
Identifiers
CVE-2026-33797
CNA
juniper
Weakness (CWE)
CWE-20
Tags
Published
9 Apr 2026
Updated
23 Apr 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

ScoreRatingCVSSVectorSource
7.4 High 3.1 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H CNA (juniper)
7.1 High 4.0 CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/V:C/RE:M/U:Green CNA (juniper)Used for this record
  • CISA KEV Not listed.
  • EPSS 0.0017, the 5th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 9 Apr 2026. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.