CVE-2021-25502

HIGHNVD 7.97.9—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.9 under NVD CVSS v3. EPSS exploit probability: 0.1%, top 100% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
7.9
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.9Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

A vulnerability of storing sensitive information insecurely in Property Settings prior to SMR Nov-2021 Release 1 allows attackers to read ESN value without priviledge.

CVSS v3
7.9
EG Score
7.9(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity79% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
0.0%
KEV
Not listed

Published

November 5, 2021

Last Modified

November 21, 2024

References (2)

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 5× in last 7d / 9× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-23 14:16 UTCEPSS rescore
  2. 2026-07-23 01:58 UTCEG score recompute
  3. 2026-07-22 22:45 UTCEG score recompute
  4. 2026-07-21 15:22 UTCEPSS rescore
  5. 2026-07-21 15:22 UTCEPSS rescore
  6. 2026-07-13 06:10 UTCEPSS rescore
  7. 2026-07-08 15:12 UTCEPSS rescore
  8. 2026-06-23 21:31 UTCEPSS rescore
  9. 2026-06-23 21:31 UTCEPSS rescore
  10. 2026-06-17 17:51 UTCEPSS rescore
  11. 2026-06-15 17:46 UTCEPSS rescore
  12. 2026-06-14 23:15 UTCEPSS rescore
  13. 2026-06-13 22:58 UTCEPSS rescore
  14. 2026-06-13 22:58 UTCEPSS rescore
  15. 2026-06-12 23:10 UTCEPSS rescore
  16. 2026-06-11 13:58 UTCEPSS rescore
  17. 2026-06-10 22:16 UTCEPSS rescore
  18. 2026-06-10 13:20 UTCEPSS rescore
  19. 2026-06-08 14:15 UTCEPSS rescore
  20. 2026-06-07 15:23 UTCEPSS rescore
  21. 2026-06-07 15:23 UTCEPSS rescore
  22. 2026-06-05 22:45 UTCEPSS rescore
  23. 2026-06-05 22:45 UTCEPSS rescore
  24. 2026-06-05 06:09 UTCEPSS rescore
  25. 2026-06-05 06:09 UTCEPSS rescore
Show 20 more
  1. 2026-06-04 13:10 UTCEPSS rescore
  2. 2026-06-04 13:10 UTCEPSS rescore
  3. 2026-06-02 20:11 UTCEPSS rescore
  4. 2026-06-02 20:11 UTCEPSS rescore
  5. 2026-06-02 20:11 UTCEPSS rescore
  6. 2026-06-01 13:50 UTCEPSS rescore
  7. 2026-06-01 13:50 UTCEPSS rescore
  8. 2026-05-31 22:29 UTCEPSS rescore
  9. 2026-05-31 22:29 UTCEPSS rescore
  10. 2026-05-31 00:15 UTCEPSS rescore
  11. 2026-05-29 13:42 UTCEPSS rescore
  12. 2026-05-28 13:43 UTCEPSS rescore
  13. 2026-05-28 13:43 UTCEPSS rescore
  14. 2026-05-27 13:39 UTCEPSS rescore
  15. 2026-05-27 13:39 UTCEPSS rescore
  16. 2026-05-26 13:42 UTCEPSS rescore
  17. 2026-05-26 08:00 UTCEG score recompute
  18. 2026-05-26 08:00 UTCGHSA enrichment
  19. 2026-05-26 07:17 UTCEPSS rescore
  20. 2026-05-26 07:17 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2021-25502?
CVE-2021-25502 is a high vulnerability published on November 5, 2021. A vulnerability of storing sensitive information insecurely in Property Settings prior to SMR Nov-2021 Release 1 allows attackers to read ESN value without priviledge.
When was CVE-2021-25502 disclosed?
CVE-2021-25502 was first published in the National Vulnerability Database on November 5, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-25502 actively exploited?
CVE-2021-25502 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2021-25502?
CVE-2021-25502 has a CVSS v3 base score of 7.9 (NVD).
How do I remediate CVE-2021-25502?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-25502, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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