Cisco Emergency Responder Upgrade privileges management

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.6$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Cisco Emergency Responder, Unified Communications Manager, Unified Communications Manager Session Management Edition and Unity Connection. Affected by this vulnerability is an unknown functionality of the component Upgrade Handler. The manipulation leads to an unknown weakness. This vulnerability is uniquely identified as CVE-2023-20266. The attack is possible to be carried out remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Cisco Emergency Responder, Unified Communications Manager, Unified Communications Manager Session Management Edition and Unity Connection (Unified Communication Software) (affected version unknown). It has been rated as critical. This issue affects an unknown functionality of the component Upgrade Handler. Using CWE to declare the problem leads to CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. Impacted is confidentiality, and integrity. The summary by CVE is:

A vulnerability in Cisco Emergency Responder, Cisco Unified Communications Manager (Unified CM), Cisco Unified Communications Manager Session Management Edition (Unified CM SME), and Cisco Unity Connection could allow an authenticated, remote attacker to elevate privileges to root on an affected device. This vulnerability exists because the application does not properly restrict the files that are being used for upgrades. An attacker could exploit this vulnerability by providing a crafted upgrade file. A successful exploit could allow the attacker to elevate privileges to root. To exploit this vulnerability, the attacker must have valid platform administrator credentials on an affected device.

The weakness was disclosed 08/30/2023 as cisco-sa-cucm-priv-esc-D8Bky5eg. The advisory is shared at sec.cloudapps.cisco.com. The identification of this vulnerability is CVE-2023-20266 since 10/27/2022. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/02/2025). MITRE ATT&CK project uses the attack technique T1068 for this issue.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-24445). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.7
VulDB Meta Temp Score: 6.6

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.2
NVD Vector: 🔍

CNA Base Score: 6.5
CNA Vector (Cisco Systems, Inc.): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Privileges management
CWE: CWE-269 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

10/27/2022 🔍
08/30/2023 +307 days 🔍
08/30/2023 +0 days 🔍
07/02/2025 +672 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-cucm-priv-esc-D8Bky5eg
Status: Confirmed

CVE: CVE-2023-20266 (🔍)
GCVE (CVE): GCVE-0-2023-20266
GCVE (VulDB): GCVE-100-238337
EUVD: 🔍

Entryinfo

Created: 08/30/2023 19:29
Updated: 07/02/2025 03:58
Changes: 08/30/2023 19:29 (48), 09/22/2023 21:00 (13), 07/02/2025 03:58 (16)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

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