How severe is CVE-2016-6427?

CVE-2016-6427 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2016-6427 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-6427?

CVE-2016-6427 primarily affects Cisco Unified Contact Center Express. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-6427?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2016-6427 published?

CVE-2016-6427 was published on 2016-10-06 and last updated on 2026-06-17.

CVE-2016-6427

CVE-2016-6427 is a high-severity vulnerability in Cisco Unified Contact Center Express with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-352.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.8
EPSS exploit prediction: 1% (46th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-352
Affected product: Cisco Unified Contact Center Express
Published: 2016-10-06
Last modified: 2026-06-17

Description

Cross-site request forgery (CSRF) vulnerability in Cisco Unified Intelligence Center (CUIC) 8.5.4 through 9.1(1), as used in Unified Contact Center Express 10.0(1) through 11.0(1), allows remote attackers to hijack the authentication of arbitrary users, aka Bug IDs CSCuy75036 and CSCuy81654.

Frequently asked questions

What is CVE-2016-6427?: Cross-site request forgery (CSRF) vulnerability in Cisco Unified Intelligence Center (CUIC) 8.5.4 through 9.1(1), as used in Unified Contact Center Express 10.0(1) through 11.0(1), allows remote attackers to hijack the authentication of arbitrary users, aka Bug IDs CSCuy75036 and CSCuy81654.
How severe is CVE-2016-6427?: CVE-2016-6427 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2016-6427 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-6427?: CVE-2016-6427 primarily affects Cisco Unified Contact Center Express. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-6427?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2016-6427 published?: CVE-2016-6427 was published on 2016-10-06 and last updated on 2026-06-17.

References

Affected products (7)

cpe:2.3:a:cisco:unified_contact_center_express:10.0\(1\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_contact_center_express:10.5\(1\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_contact_center_express:10.6\(1\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_contact_center_express:11.0\(1\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_intelligence_center:8.5.4:*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_intelligence_center:9.0\(2\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_intelligence_center:9.1\(1\):*:*:*:*:*:*:*

More vulnerabilities in Cisco Unified Contact Center Express

CVE-2021-44228 — Critical (CVSS 10.0): Apache Log4j2 2.0-beta9 through 2.15.0 (excluding security releases 2.12.2, 2.12.3, and 2.3.1) JNDI features used in…
CVE-2024-20253 — Critical (CVSS 9.9): A vulnerability in multiple Cisco Unified Communications and Contact Center Solutions products could allow an…
CVE-2025-20354 — Critical (CVSS 9.8): A vulnerability in the Java Remote Method Invocation (RMI) process of Cisco Unified CCX could allow an unauthenticated,…
CVE-2020-3280 — Critical (CVSS 9.8): A vulnerability in the Java Remote Management Interface of Cisco Unified Contact Center Express (Unified CCX) could…
CVE-2018-0403 — Critical (CVSS 9.8): Multiple vulnerabilities in the web-based management interface of Cisco Unified Contact Center Express (Unified CCX)…
CVE-2017-12337 — Critical (CVSS 9.8): A vulnerability in the upgrade mechanism of Cisco collaboration products based on the Cisco Voice Operating System…

All CVEs affecting Cisco Unified Contact Center Express →

Other CWE-352 (Cross-Site Request Forgery (CSRF)) vulnerabilities

CVE-2025-32642 — Critical (CVSS 10.0): Cross-Site Request Forgery (CSRF) vulnerability in appsbd Vite Coupon vite-coupon allows Remote Code Inclusion.This…
CVE-2025-23922 — Critical (CVSS 10.0): Cross-Site Request Forgery (CSRF) vulnerability in Harsh iSpring Embedder embed-ispring allows Upload a Web Shell to a…
CVE-2017-5145 — Critical (CVSS 10.0): An issue was discovered in Carlo Gavazzi VMU-C EM prior to firmware Version A11_U05, and VMU-C PV prior to firmware…
CVE-2019-25729 — Critical (CVSS 9.8): PDF Signer 3.0 contains a server-side template injection vulnerability that allows unauthenticated attackers to execute…
CVE-2025-48340 — Critical (CVSS 9.8): Cross-Site Request Forgery (CSRF) vulnerability in Danny Vink User Profile Meta Manager user-profile-meta allows…
CVE-2025-2907 — Critical (CVSS 9.8): The Order Delivery Date WordPress plugin before 12.3.1 does not have authorization and CSRF checks when importing…

Browse all CWE-352 (Cross-Site Request Forgery (CSRF)) vulnerabilities →