CVE Intelligence
High File handling

CVE-2026-76479 — Cisco Unified Communications Products Hardening Release: October 2026 - Path Traversal Vulnerabilities

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. The vulnerabilities tracked by CVE-2026-76479 are related to issues concerning improper limitation of a pathname to a restricted directory that are grouped under the Common Weakness Enumeration (CWE) Base CWE-22.

Published Oct 21, 2026 · Updated Oct 22, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP, GitHub Security Advisories · CNA: cisco

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.
How the score was calculated
  • EPSS 0.2% (30-day exploitation probability)+1
  • Technical severity (high)+6

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation
Not confirmed
Not in CISA KEV — an absence of record, not proof it is unexploited.
EPSS FIRST
0.19%
ahead of 8% of scored CVEs · Oct 23, 2026
Affects
Cisco
Emergency Responder and 3 more
CVSS base
7.8
High · 3 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation
None
none · proof-of-concept · active
Automatable
No
can an attacker script the kill-chain steps
Technical impact
Total
partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

  1. Identify exposed assets running the affected vendor/product/version combinations (Cisco Emergency Responder, Cisco Unified Communications Manager, Cisco Unified Communications Manager Im And Presence Service…).
  2. No fix documented in the sources: reduce exposure and monitor the vendor advisory.
  3. Search available logs for exploit probes matching the vulnerability class (file handling), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

VendorProductVersionsStatusSource
Cisco Emergency Responder version 14SU6version 14version 14SU1version 14SU2version 14SU3version 14SU3aversion 15version 15SU1
and 6 more version 15SU1aversion 14SU4version 15SU2version 15SU3version 14SU5version 15SU4
Vulnerable CVE Program (cve.org) e CISA ADP
Cisco Unified Communications Manager version 14SU1version 14SU6version 15SU4aversion 15SU4version 14SU5version 15.0.1.13017-1version 14version 14SU2
and 15 more version 14SU3version 15version 15SU1version 14SU4version 14SU4aversion 15SU1aversion 15SU2version 15.0.1.13010-1version 15.0.1.13011-1version 15.0.1.13012-1version 15.0.1.13013-1version 15.0.1.13014-1version 15SU3aversion 15.0.1.13016-1version 15.0.1.13015-1
Vulnerable CVE Program (cve.org) e CISA ADP
Cisco Unified Communications Manager Im And Presence Service version 14SU6version 14version 14SU1version 14SU2version 14SU2aversion 14SU3version 15version 15SU1
and 5 more version 14SU4version 15SU2version 15SU3version 14SU5version 15SU4
Vulnerable CVE Program (cve.org) e CISA ADP
Cisco Unity Connection version 14SU6version 15SU4version 14SU5version 15SU3version 15SU2version 14SU4version 15SU1version 15
and 5 more version 14SU3aversion 14SU3version 14SU2version 14SU1version 14
Vulnerable CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

ScoreVersionSeverityExpl.ImpactScored by
7.8 CVSS 3.1 High 1.8 5.9 psirt@cisco.com via NIST National Vulnerability Database
7.8 CVSS 3.1 High — — GitHub, Inc. via GitHub Security Advisories
7.8 CVSS 3.1 High — — cisco via CVE Program (cve.org) e CISA ADP
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H (score shown at the top: psirt@cisco.com)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-22 · Path Traversal

Other CVEs with this weakness →

EPSS over time FIRST

Oct 22, 2026 → Oct 23, 2026 · 2 reading(s) · max 0.19%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

  • Local/physical vector: focus on endpoint telemetry (EDR) from affected hosts.
  • Monitor file creation in web directories and paths with traversal sequences (../).
endpoint telemetry (EDR)file integrity (FIM)

Timeline

What happened to this CVE, newest first.

  • 2026
  • SSVC assessment updated
    Oct 22, 2026 · CVE Program (cve.org) e CISA ADP
  • Source status changed · Received → Awaiting Analysis
    Oct 21, 2026 · NIST National Vulnerability Database
  • Affected products added · cisco/cisco emergency responder, cisco/cisco unified communications manager, cisco/cisco unified communications manager
    Oct 21, 2026 · CVE Program (cve.org) e CISA ADP
  • Record published
    Oct 21, 2026
  • CVSS changed · 7.8
    Oct 21, 2026 · NIST National Vulnerability Database
  • Source status changed · → Received
    Oct 21, 2026 · NIST National Vulnerability Database
  • Record created in this database
    Oct 21, 2026 · Alertas do Telegram
  • CVE published
    Oct 21, 2026 · cisco

Source activity

Repeated readings are counted rather than listed.

  • 2× References added · Oct 21, 2026 – Oct 22, 2026
  • 1× Official description updated · Oct 21, 2026 – Oct 21, 2026

References

3 on the record

Elsewhere on this site

Cisco
every CVE for this vendor
File handling
same class
CWE-22
other pages naming this weakness

Related CVEs (same products)

  • CVE-2026-76487 Cisco Unified Communications Manager Improper Access Control Vulnerability 3d
  • CVE-2026-76475 Cisco Unified Communications Products Hardening Release: October 2026 - Cross-site Scripting Vulnerabilities 3d
  • CVE-2026-76474 Cisco Unified Communications Products Hardening Release: October 2026 - Improper Authentication Vulnerabilities 3d
  • CVE-2026-76476 Cisco Unified Communications Products Hardening Release: October 2026 - Improper Input Validation Vulnerabilities 3d
  • CVE-2026-76477 Cisco Unified Communications Products Hardening Release: October 2026 - Injection Vulnerabilities 3d
  • CVE-2026-76478 Cisco Unified Communications Products Hardening Release: October 2026 - Improper Access Control Vulnerabilities 3d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

  • No fixed version, patch or mitigation documented.
  • No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
  • No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
  • No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-76479 is "Cisco Unified Communications Products Hardening Release: October 2026 - Path Traversal Vulnerabilities", rated High. It affects Emergency Responder (Cisco); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 7.8 describes technical severity. EPSS 0.19% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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