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TI-2020-16493 Aliases CVE-2020-27131GHSA-jwxx-hpqc-j7wm

Cisco Security Manager Java Deserialization Vulnerabilities

Priority CRITICAL 86CWE-20Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-502.

Summary

Multiple vulnerabilities in the Java deserialization function that is used by Cisco Security Manager could allow an unauthenticated, remote attacker to execute arbitrary commands on an affected device. These vulnerabilities are due to insecure deserialization of user-supplied content by the affected software. An attacker could exploit these vulnerabilities by sending a malicious serialized Java object to a specific listener on an affected system. A successful exploit could allow the attacker to execute arbitrary commands on the device with the privileges of NT AUTHORITY\SYSTEM on the Windows target host. Cisco has not released software updates that address these vulnerabilities.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.91792 99th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
CiscoCisco Security Managerall versions—No fix listedCNA
  • Cisco Security Manager VendorCisco Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:cisco:security_manager:*:*:*:*:*:*:*:*up to 4.22VulnerableCisco
  • cpe:2.3:a:cisco:security_manager:*:*:*:*:*:*:*:* Versions up to 4.22 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-27131
  2. 2026-10-03 Alias added: GHSA-jwxx-hpqc-j7wm

References

Advisory 1

  • TI-2019-09430 Cisco Security Manager Java Deserialization Vulnerability CVSS 3.1CRITICAL 9.8
  • TI-2020-16492 Cisco Security Manager Path Traversal Vulnerability CVSS 3.1CRITICAL 9.1
  • TI-2009-01101 Directory traversal vulnerability in the TFTP service in Cisco CiscoWorks Common Services… CVSS 2.0HIGH 10.0
  • TI-2010-02906 Multiple buffer overflows in the authentication functionality in the web-server module in… CVSS 2.0HIGH 10.0
  • TI-2019-01524 Cisco Security Manager XML Entity Expansion Vulnerability CVSS 3.0CRITICAL 9.1
  • TI-2020-16487 Cisco Security Manager Static Credential Vulnerability CVSS 3.1CRITICAL 9.8
See all 29 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences