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CVE-2021-1355

21
FAUCET Score

CVE-2021-1355 describes multiple vulnerabilities, including path traversal and SQL injection, affecting Cisco Unified Communications Manager IM & Presence Service (Unified CM IM&P), with one SQL injection also impacting Cisco Unified Communications Manager (Unified CM) and Unified CM Session Management Edition (Unified CM SME). The vulnerability has a CVSS score of 6.5 (Medium), indicating it can be exploited remotely with low complexity by an authenticated attacker, potentially leading to high confidentiality impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 11.5\(1\)su9CPE matchmatch criteria
cpe:2.3:a:cisco:unified_communications_manager:*:*:*:*:*:*:*:*
< 11.5\(1\)su9CPE matchmatch criteria
cpe:2.3:a:cisco:unified_communications_manager:*:*:*:*:session_management:*:*:*
>= 12.0, < 12.0\(1\)su4CPE matchmatch criteria
cpe:2.3:a:cisco:unified_communications_manager:*:*:*:*:*:*:*:*
>= 12.0, < 12.0\(1\)su4CPE matchmatch criteria
cpe:2.3:a:cisco:unified_communications_manager:*:*:*:*:session_management:*:*:*
>= 12.5, < 12.5\(1\)su4CPE matchmatch criteria
cpe:2.3:a:cisco:unified_communications_manager:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.35%
Probability of exploitation in next 30 days
EPSS Percentile
68.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0135 is in the 82nd percentile among its peer group of 21,977 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

ciscovendor investigatingvia nvd_reference
View patch

References

tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-imp-trav-inj-dM687ZD6
Vendor Advisory