CVE-2026-76477
CVE-2026-76477 is covered by the cisco-sa-voice-hardening-twgbH9e3 security bulletin. Not in the CISA KEV catalog. Critical 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-2026-76477 at a glance
- CISA KEV
- Not listed (catalog checked )
- Highest advisory severity
- Critical
- Vendor advisories
- 1 from Cisco
- VulniPulse record
- Published · Updated
Is CVE-2026-76477 exploited?
No exploitation is reported in the sources VulniPulse tracks: CVE-2026-76477 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-2026-76477?
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
1 advisory- Advisory severityCritical9.8
Critical [CVE-2026-76473 +7] Cisco Unified Communications Products Security Hardening Release: October 2026
cisco-sa-voice-hardening-twgbH9e3Source published Source updated
This bulletin covers 8 CVEs. The products, versions, score and guidance below describe the bulletin; check its source for applicability to this specific CVE.
As part of Cisco's ongoing commitment to proactive security and product quality, engineering teams for Cisco Emergency Responder, Cisco Prime Collaboration Deployment, Cisco Unified Communications Manager (Unified CM), Cisco Unified Communications Manager IM & Presence Service (Unified CM IM&P), Cisco Unified Communications Manager Session Management Edition (Unified CM SME), and Cisco Unity Connection have conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities. These vulnerabilities were found during internal testing and are not known to be actively exploited. To assist customers in patching and streamline the disclosure process, Cisco has grouped these issues by their underlying…
- Affected products in this advisory
- Emergency Responder
- Unified Communications Manager IM and Presence Service
- Unity Connection
- Source-reported affected versions
- Scope: These vulnerabilities affect the following Cisco products, regardless of device configuration:
- 14 — Migrate to a fixed release
- Release 15 (first fixed: 15SU5)
- Source-reported fixed versions
- 15SU5
- Mitigation guidance
- Upgrade to the first fixed release for your train per the Fixed Releases table in this advisory.
- Release 14: migrate to a fixed release.
- Release 15: upgrade to 15SU5.
- Workarounds
- There are no workarounds that address these vulnerabilities.
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