CVE-2026-76489
CVE-2026-76489 is covered by the cisco-sa-snort3-misc-dos-6mB22qAK security bulletin. Not in the CISA KEV catalog. Medium advisory severity.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
CVE-2026-76489 at a glance
- CISA KEV
- Not listed (catalog checked )
- Highest advisory severity
- Medium
- Vendor advisories
- 2 from Cisco
- VulniPulse record
- Published · Updated
Is CVE-2026-76489 exploited?
No exploitation is reported in the sources VulniPulse tracks: CVE-2026-76489 is not in the CISA KEV catalog (checked ) and no tracked advisory for it reports exploitation. That is not proof the vulnerability cannot be exploited.
How do I fix CVE-2026-76489?
This CVE is tracked through a multi-CVE bulletin, so its fixed releases may differ from the bulletin-wide values below. Check the vendor source.
Vendor advisory comparison
Cisco
2 advisories- Advisory severityMedium5.8
Medium [CVE-2026-20019 +3] Multiple Cisco Products Snort 3 Denial of Service Vulnerabilities
cisco-sa-snort3-misc-dos-6mB22qAKSource published Source updated
This bulletin covers 4 CVEs. The products, versions, score and guidance below describe the bulletin; check its source for applicability to this specific CVE.
Multiple Cisco products are affected by vulnerabilities in the Snort 3 Detection Engine that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart unexpectedly, resulting in a denial of service (DoS) condition. For more information about these vulnerabilities, see the Details section of this advisory. Cisco has released software updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities. This advisory is part of a group of advisories. For a complete list of the advisories and links to them, see Cisco Advance Notification for Publication of October 21, 2026, Security Advisories. In addition, for further documentation of improvements and fixes in Open Source Snort 3, see Multiple Cisco Products Snort 3…
- Affected products in this advisory
- Secure Firewall Threat Defense (FTD) Software
- Firepower 2100 Series
- Firepower 1000 Series
- ASA 5500-X Series Firewalls
4 more entries in the full advisory.
- Source-reported affected versions
- Scope: For information about which products were affected by these vulnerabilities at the time of publication, see the following sections. Open Source Snort 3
- Release 3.x (first fixed: 3.12.4.0)
- Release 17.12 (first fixed: 17.12.8)
- Release 17.15 (first fixed: 17.15.6)
3 more entries in the full advisory.
- Source-reported fixed versions
- 3.12.4.0
- 17.12.8
- 17.15.6
- 17.18.5
2 more entries in the full advisory.
- Mitigation guidance
- Upgrade to the first fixed release for your train per the Fixed Releases table in this advisory.
- Release 3.x: upgrade to 3.12.4.0.
- Release 17.12: upgrade to 17.12.8.
- Release 17.15: upgrade to 17.15.6.
3 more entries in the full advisory.
- Workarounds
- There are no workarounds that address these vulnerabilities.
- Advisory severityUnrated
Advisory [CVE-2026-20011 +12] Cisco Advance Notification for Publication of October 21, 2026, Security Advisories
cisco-sa-notice-QGwHnJ6kSource published Source updated
This bulletin covers 13 CVEs. The products, versions, score and guidance below describe the bulletin; check its source for applicability to this specific CVE.
On October 21, 2026, the Cisco Product Security Incident Response Team (PSIRT) published the following advisories. To remediate the vulnerabilities that were disclosed on October 21, 2026, Cisco strongly recommends that customers upgrade to the fixed software that is indicated in the advisories. For more information about changes in Cisco PSIRT vulnerability disclosure, see Strengthening the Foundation: A Predictable, Customer-Focused Response to AI-Accelerated Vulnerability Discovery. Snort 3 Cisco Security Advisory CVE ID Security Impact Rating CVSS Base Score Critical 9.0 High 7.8 Medium 5.8 5.3 Cisco Expressway and Unified Communications Products
- Affected products in this advisory
- No product details extracted. Check the source bulletin.
- Source-reported affected versions
- Affected-version details not available in this record.
- Source-reported fixed versions
- No fixed-version detail extracted. This does not mean no fix exists.
- Mitigation guidance
- To remediate the vulnerabilities that were disclosed on October 21, 2026, Cisco strongly recommends that customers upgrade to the fixed software that is indicated in the advisories.
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