CVE-2026-76481VulnerabilityPublished 21 Oct 2026Updated 7 Nov 2026

As part of Cisco's ongoing commitment to proactive security and product quality, engineering teams for Cisco Emergency

Source GCVE Database

Compare

Authoritative record:CVE-2026-76481· High 7.5

Not known to be exploited · CVSS 7.5 High.

Data as of 7 Nov 2026, 19:34 UTC

CVSS 3.1 base score

7.5High

How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none

CVSS scores by source
CNA (cisco)	CVSS 3.1	7.5

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: None
Availability: High

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: None: There is no loss of confidentiality within the impacted component.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: High: There is total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable).

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 21 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 7 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

ghsa-wf3w-h74r-36x7

What to do

Affected software

Product	Affected	Fixed in
CiscoCisco Emergency Responder	Affected 14 – 15SU4 14 affected builds	Fixed in–
CiscoCisco Unified Communications Manager	Affected 14 – 15SU4a 23 affected builds	Fixed in–
CiscoCisco Unified Communications Manager IM and Presence Service	Affected 14 – 15SU4 13 affected builds	Fixed in–
CiscoCisco Unity Connection	Affected 14 – 15SU4 13 affected builds	Fixed in–

AI-suggested

Cisco has released software hardening updates to address these vulnerabilities. Users of the affected Cisco products should apply the provided updates as part of their regular maintenance to mitigate the risk. Since no cloud services are involved, manual patching is required. No additional mitigation steps are specified.

Description

Cisco has identified multiple vulnerabilities related to improper handling of exceptional conditions (CWE-703) in several of its collaboration and communication products. These issues were discovered during an internal security review and addressed through software hardening releases. The affected products include Cisco Emergency Responder, Cisco Prime Collaboration Deployment, Cisco Unified Communications Manager, Cisco Unified Communications Manager IM & Presence Service, Cisco Unified Communications Manager Session Management Edition, and Cisco Unity Connection. The vulnerabilities have a high severity score with an impact primarily on availability. No public exploits or in-the-wild exploitation have been reported.

Impact

The vulnerabilities can cause denial of service (availability impact) in affected Cisco collaboration and communication products. There is no impact on confidentiality or integrity. No active exploitation or public exploit code has been reported.

Summary

Cisco conducted an internal security review of multiple collaboration and communication products, resulting in the identification of vulnerabilities classified under CWE-703 (Improper Handling of Exceptional Conditions). These vulnerabilities affect several Cisco products related to unified communications and emergency response. The issues could lead to denial of service conditions, as indicated by the CVSS vector showing no confidentiality or integrity impact but a high impact on availability. Cisco released software hardening updates to address these vulnerabilities. No evidence of active exploitation is currently known.

CWE-703Improper Check or Handling of Exceptional Conditions (opens in a new tab)
Pillar weaknessOWASP Top 10 A10:2025: Mishandling of Exceptional Conditions (opens in a new tab)
The product does not properly anticipate or handle exceptional conditions that rarely occur during normal operation of the product.
MITRE discourages mapping vulnerabilities to this broad entry; the root cause is usually a more specific weakness.
OWASP Cheat Sheets
Logging (opens in a new tab)
Error Handling (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

Community reviews

Loading reviews…

Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 7 Nov 2026, 19:34 UTC

WeaknessesCWE-703

Technical details

References

Community reviews

Related threats