CVE-2021-1226 | Cisco Unified Communications Products Information Disclosure Vulnerability

A vulnerability in the audit logging component of Cisco Unified Communications Manager, Cisco Unified Communications Manager Session Management Edition, Cisco Unified Communications Manager IM & Presence Service, Cisco Unity Connection, Cisco Emergency Responder, and Cisco Prime License Manager could allow an authenticated, remote attacker to view sensitive information in clear text on an affected system. The vulnerability is due to the storage of certain unencrypted credentials. An attacker could exploit this vulnerability by accessing the audit logs on an affected system and obtaining credentials that they may not normally have access to. A successful exploit could allow the attacker to use those credentials to discover and manage network devices.

Published: 2021-01-13 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-1226 is rated Low Risk (31.8/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.22%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-1226

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-30 0.44% 0.22% -0.21%
2 2025-03-29 0.16% 0.44% +0.28%
3 2023-04-07 — 0.16% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-1226

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 2.8 1.4 [email protected]
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 2.8 3.6 [email protected]
4.0 2.0 MEDIUM
AV:N/AC:L/Au:S/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 8.0 2.9 [email protected]

Weakness enumeration for CVE-2021-1226

Affected software / configurations for CVE-2021-1226

Vendor Product Version Raw CPE
cisco emergency_responder >= 12.5\(1\), < 12.5\(1\)su3 cpe:2.3:a:cisco:emergency_responder:*:*:*:*:*:*:*:*
cisco emergency_responder 10.5\(2\) cpe:2.3:a:cisco:emergency_responder:10.5\(2\):*:*:*:*:*:*:*
cisco emergency_responder 11.5\(1\) cpe:2.3:a:cisco:emergency_responder:11.5\(1\):*:*:*:*:*:*:*
cisco emergency_responder 12.0\(1\) cpe:2.3:a:cisco:emergency_responder:12.0\(1\):*:*:*:*:*:*:*
cisco prime_license_manager >= 11.5\(1\), < 11.5\(1\)su9 cpe:2.3:a:cisco:prime_license_manager:*:*:*:*:*:*:*:*
cisco prime_license_manager 10.5\(2\) cpe:2.3:a:cisco:prime_license_manager:10.5\(2\):*:*:*:*:*:*:*
cisco unified_communications_manager >= 11.5\(1\), < 11.5\(1\)su9 cpe:2.3:a:cisco:unified_communications_manager:*:*:*:*:-:*:*:*
cisco unified_communications_manager >= 11.5\(1\), < 11.5\(1\)su9 cpe:2.3:a:cisco:unified_communications_manager:*:*:*:*:session_management:*:*:*
cisco unified_communications_manager 10.5\(2\) cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\):*:*:*:-:*:*:*
cisco unified_communications_manager 10.5\(2\) cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\):*:*:*:session_management:*:*:*
cisco unified_communications_manager_im_\&_presence_service >= 11.5\(1\), < 11.5\(1\)su9 cpe:2.3:a:cisco:unified_communications_manager_im_\&_presence_service:*:*:*:*:*:*:*:*
cisco unified_communications_manager_im_\&_presence_service >= 12.5\(1\), < 12.5\(1\)su3 cpe:2.3:a:cisco:unified_communications_manager_im_\&_presence_service:*:*:*:*:*:*:*:*
cisco unified_communications_manager_im_\&_presence_service 10.5\(2\) cpe:2.3:a:cisco:unified_communications_manager_im_\&_presence_service:10.5\(2\):*:*:*:*:*:*:*
cisco unified_communications_manager_im_\&_presence_service 12.0\(1\) cpe:2.3:a:cisco:unified_communications_manager_im_\&_presence_service:12.0\(1\):*:*:*:*:*:*:*
cisco unity_connection >= 11.5\(1\), < 11.5\(1\)su9 cpe:2.3:a:cisco:unity_connection:*:*:*:*:*:*:*:*
cisco unity_connection >= 12.0\(1\), < 12.0\(1\)su4 cpe:2.3:a:cisco:unity_connection:*:*:*:*:*:*:*:*
cisco unity_connection >= 12.5\(1\), < 12.5\(1\)su3 cpe:2.3:a:cisco:unity_connection:*:*:*:*:*:*:*:*
cisco unity_connection 10.5\(2\) cpe:2.3:a:cisco:unity_connection:10.5\(2\):*:*:*:*:*:*:*

References for CVE-2021-1226

cvelogic Threat Intelligence