Is there a public exploit for CVE-2026-120033?

No public exploit for CVE-2026-120033 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-120033?

CVE-2026-120033 scores CVSS 6 (v4.0), rated medium.

What does CVE-2026-120033 affect?

CVE-2026-120033 affects FRRouting FRRouting.

6.0 Medium

In FRRouting 10.1 and later, bgpd does not correctly close a BGP session when the Send Hold Timer (RFC 9687) expires, i.e.

CVE-2026-120033

In FRRouting 10.1 and later, bgpd does not correctly close a BGP session when the Send Hold Timer (RFC 9687) expires, i.e. when a neighbor has stopped accepting data from the router for twice the hold time. The connection is closed, but bgpd still considers the session to be up. A BGP neighbor that keeps sending KEEPALIVEs but stops reading from its connection, at a time when the router has a large amount of data to send to it (for example while sending it a full routing table), can cause one of the following: If the neighbor announced Graceful Restart support: bgpd crashes shortly after the session is closed (after the neighbor's announced restart time plus one keepalive interval), taking down all BGP sessions on the router. The neighbor can repeat this each time bgpd restarts. Otherwise: the session stays stuck in the Established state. The neighbor's routes stay installed and keep being advertised to other peers, and the neighbor cannot reconnect until an operator runs "clear bgp ". The neighbor does not need to be malicious; an overloaded or stuck peer can trigger the same behavior. Required configuration: no special configuration is needed. Any BGP neighbor with an…

Assessment

CVSS: 6 (v4.0)
Severity: Medium
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 12 November 2026
Last updated: 12 November 2026
Affected: FRRouting · FRRouting
Assigner: NetDEF

CVSS vectorCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:L/SA:L/AU:N/R:A

At the source

EUVD (ENISA)

References

https://github.com/FRRouting/frr/pull/23945/changes/57a7f3eb48837359d6e3ee5ebd4acea8f49320e5

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