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TI-2021-03380 Aliases CVE-2021-20076GHSA-3ccq-6jj2-4rxc

Deserialization of untrusted data in Tenable.sc

Priority MEDIUM 42CWE-502Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
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

Tenable.sc and Tenable.sc Core versions 5.13.0 through 5.17.0 were found to contain a vulnerability that could allow an authenticated, unprivileged user to perform Remote Code Execution (RCE) on the Tenable.sc server via Hypertext Preprocessor unserialization.

Why it matters now

EPSS 0.02055 81st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—Tenable.sc5.13.0 through 5.17.0—No fix listedCNA
  • Tenable.sc Vendor— Affected 5.13.0 through 5.17.0 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:tenable:tenable.sc:*:*:*:*:*:*:*:*5.13.0 – 5.17.0VulnerableTenable
  • cpe:2.3:a:tenable:tenable.sc:*:*:*:*:*:*:*:* Versions 5.13.0 – 5.17.0 Vulnerable ·Tenable

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-20076
  2. 2026-10-03 Alias added: GHSA-3ccq-6jj2-4rxc

References

Advisory 1

  • TI-2019-08259 Underflow in PHP-FPM can lead to RCE KEVCVSS 3.1CRITICAL 9.8
  • TI-2021-17490 mod_proxy SSRF KEVCVSS 3.1CRITICAL 9.0
  • TI-2021-02645 SM2 Decryption Buffer Overflow CVSS 3.1CRITICAL 9.8
  • TI-2021-20274 Possible buffer overflow when parsing multipart content in mod_lua of Apache HTTP Server 2.4.51 and earlier CVSS 3.1CRITICAL 9.8
  • TI-2021-19915 Possible NULL dereference or SSRF in forward proxy configurations in Apache HTTP Server 2.4.51 and earlier CVSS 3.1HIGH 8.2
  • TI-2021-13795 NULL pointer dereference in httpd core CVSS 3.1HIGH 7.5
See all 45 →

Sources

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