CVE-2025-20340

Risk Scores

Exploit Intelligence

• CIRCL seen: CVE-2025-20340 (circl-sighting)
• CIRCL seen: CVE-2025-20340 (circl-sighting)
• CIRCL seen: CVE-2025-20340 (circl-sighting)
• cisco-sa-iosxr-arp-storm-EjUU55yM (circl)

Timeline

• Oct 10, 2024 CVE ID Reserved
• Sep 10, 2025 Coalition ESS Score
• Sep 10, 2025 CVE Published
• Sep 10, 2025 PoC Published
• Sep 10, 2025 CVE Updated
• Sep 11, 2025 EPSS Score
• Sep 11, 2025 Coalition ESS Score
• Sep 11, 2025 PoC Published
• Sep 15, 2025 PoC Published
• Sep 17, 2025 Coalition ESS Score
• Sep 18, 2025 EPSS Score
• Sep 26, 2025 EPSS Score

References

• https://cert.ssi.gouv.fr/avis/CERTFR-2025-AVI-0781/ advisory
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xrsig-UY4zRUCG advisory
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-arp-storm-EjUU55yM advisory