Security Resilience

CWE · MITRE source

CWE-477Use of Obsolete Function

Abstraction: Base · CVEs in our corpus: 16

The code uses deprecated or obsolete functions, which suggests that the code has not been actively reviewed or maintained.

As programming languages evolve, functions occasionally become obsolete due to: Functions that are removed are usually replaced by newer counterparts that perform the same task in some different and hopefully improved way.

Last updated: 15 October 2026 14:21 UTC

OWASP Top 10 for Web (2025)

This weakness contributes to A03:2025 Software Supply Chain Failures.

Control responseHuman-reviewed

Answering this weakness across the control lifecycle, from our framework cross-walks.

Prevent
Stop it (NIST 800-53 / CSF Protect)
  • PM-15 Security and Privacy Groups and Associations
  • RA-4 Risk Assessment Update
  • SA-22 Unsupported System Components
  • ID.AM-08
Detect
Catch it (CSF Detect / Respond)

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Harden
Shrink the surface (DISA STIG)

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Validate
Prove the fix (OWASP ASVS)

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NIST 800-53 r5 controls PROPOSED for this weakness (3)AI-assisted

These are model PROPOSALS, not graded mappings. They come from controls_to_cwe_proposals, which carries no grade field at all; across the CWE pages 1,540 of 1,722 such associations (89%) have never been graded by anything. The heading said “address” until 2026-09-29, which asserted a relationship the data does not carry. Graded cross-walks are on the framework map, not here.

Control Title Family Why it addresses this CWE
PM-15Security and Privacy Groups and AssociationsPMInstitutionalized information sharing keeps developers aware of obsolete functions and the need to replace them with supported alternatives.
RA-4Risk Assessment UpdateRARegular reassessment flags use of obsolete functions whose security properties have degraded or whose replacements contain fixes for known weaknesses.
SA-22Unsupported System ComponentsSAEliminates reliance on functions or components explicitly declared obsolete and unsupported by their maintainers.

Top CVEs of this weakness type, ranked by Risk Priority

CVE Risk CVSS EPSS Published
CVE-2025-49212 8.39.80.13272025-06-17
CVE-2025-49213 8.39.80.13272025-06-17
CVE-2018-17890 7.89.80.03262018-10-12
CVE-2025-49220 7.79.80.02062025-06-17
CVE-2025-49219 7.69.80.01412025-06-17
CVE-2025-49217 7.59.80.01092025-06-17
CVE-2023-23451 7.49.80.00622023-04-19
CVE-2025-49216 7.39.80.00552025-06-17
CVE-2019-18251 6.98.80.01742019-11-26
CVE-2025-49214 6.78.80.00842025-06-17
CVE-2026-1693 5.87.50.00332026-02-26
CVE-2020-6978 5.57.20.00782020-03-24
CVE-2022-1384 4.04.70.00672022-04-19
CVE-2019-10968 3.64.40.00342019-07-24
CVE-2023-28829 3.33.90.00292023-06-13
CVE-2019-10988 3.03.40.00342019-09-04