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TI-2021-03435 Aliases CVE-2021-20135GHSA-8pfq-m65h-x2qr

Nessus versions 8.15.2 and earlier were found to contain a local privilege escalation…

Priority LOW 29Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

Nessus versions 8.15.2 and earlier were found to contain a local privilege escalation vulnerability which could allow an authenticated, local administrator to run specific executables on the Nessus Agent host. Tenable has included a fix for this issue in Nessus 10.0.0. The installation files can be obtained from the Tenable Downloads Portal (https://www.tenable.com/downloads/nessus).

Why it matters now

EPSS 0.00308 23rd 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
—NessusNessus 8.15.2 and earlier—No fix listedCNA
  • Nessus Vendor— Affected Nessus 8.15.2 and earlier Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:tenable:nessus:*:*:*:*:*:*:*:*up to 8.15.2VulnerableTenable
  • cpe:2.3:a:tenable:nessus:*:*:*:*:*:*:*:* Versions up to 8.15.2 Vulnerable ·Tenable

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-20135
  2. 2026-10-03 Alias added: GHSA-8pfq-m65h-x2qr

References

Advisory 1

  • TI-2022-00687 Infinite loop in BN_mod_sqrt() reachable when parsing certificates CVSS 3.1HIGH 7.5
  • TI-2021-20962 In Expat (aka libexpat) before 2.4.3, a left shift by 29 (or more) places in the… CVSS 3.1HIGH 8.8
  • TI-2021-21076 In doProlog in xmlparse.c in Expat (aka libexpat) before 2.4.3, an integer overflow exists for m_groupSize. CVSS 3.1HIGH 8.1
  • TI-2021-02413 NULL pointer deref in signature_algorithms processing CVSS 3.1MEDIUM 5.9
  • TI-2021-02414 CA certificate check bypass with X509_V_FLAG_X509_STRICT CVSS 3.1HIGH 7.4
  • TI-2022-07855 Expat (aka libexpat) before 2.4.4 has a signed integer overflow in XML_GetBuffer, for… CVSS 3.1CRITICAL 9.8
See all 67 →

Sources

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