CVE-2017-2523

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-14. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Weaponized
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 11%CVSS: 9.8Exploit: NoneExposed: 0

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

An issue was discovered in certain Apple products. iOS before 10.3.2 is affected. macOS before 10.12.5 is affected. tvOS before 10.2.1 is affected. watchOS before 3.2.2 is affected. The issue involves the "Foundation" component. It allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via crafted data.

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
95.5%
KEV
Not listed

Published

May 22, 2017

Last Modified

May 13, 2026

Advisory Details (6)

Auto-updated May 14, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

About the security content of watchOS 3.2.2 - Apple Support

https://support.apple.com/HT207800
generic

About the security content of iOS 10.3.2 - Apple Support

https://support.apple.com/HT207798
generic

About the security content of macOS Sierra 10.12.5, Security Update 2017-002 El Capitan, and Security Update 2017-002 Yosemite - Apple Support

https://support.apple.com/HT207797
generic
http://www.securityfocus.com/bid/98584
generic🟡 PoC Available

Apple macOS/iOS - NSUnarchiver Heap Corruption Due to Lack of Bounds Checking in [NSBuiltinCharacterSet initWithCoder:] - Multiple dos Exploit

https://www.exploit-db.com/exploits/42050/
generic

About the security content of tvOS 10.2.1 - Apple Support

https://support.apple.com/HT207801

Data Freshness Timeline

(refreshed 8× in last 7d / 37× 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. 2026-07-07 13:42 UTCEPSS rescore
  2. 2026-07-06 16:24 UTCEPSS rescore
  3. 2026-07-06 16:24 UTCEPSS rescore
  4. 2026-07-05 02:27 UTCEPSS rescore
  5. 2026-07-02 16:54 UTCEPSS rescore
  6. 2026-07-01 15:02 UTCEPSS rescore
  7. 2026-06-30 23:19 UTCEPSS rescore
  8. 2026-06-30 23:19 UTCEPSS rescore
  9. 2026-06-29 14:03 UTCEPSS rescore
  10. 2026-06-28 14:04 UTCEPSS rescore
  11. 2026-06-28 04:53 UTCEPSS rescore
  12. 2026-06-27 03:06 UTCEPSS rescore
  13. 2026-06-27 03:05 UTCEPSS rescore
  14. 2026-06-25 13:47 UTCEPSS rescore
  15. 2026-06-24 14:02 UTCEPSS rescore
  16. 2026-06-24 14:02 UTCEPSS rescore
  17. 2026-06-23 21:30 UTCEPSS rescore
  18. 2026-06-22 14:23 UTCEPSS rescore
  19. 2026-06-22 14:23 UTCEPSS rescore
  20. 2026-06-21 14:54 UTCEPSS rescore
  21. 2026-06-21 14:54 UTCEPSS rescore
  22. 2026-06-21 01:57 UTCEPSS rescore
  23. 2026-06-21 01:57 UTCEPSS rescore
  24. 2026-06-18 17:50 UTCEPSS rescore
  25. 2026-06-17 17:50 UTCEPSS rescore
Show 65 more
  1. 2026-06-16 17:50 UTCEPSS rescore
  2. 2026-06-16 17:50 UTCEPSS rescore
  3. 2026-06-15 17:45 UTCEPSS rescore
  4. 2026-06-14 23:14 UTCEPSS rescore
  5. 2026-06-13 22:57 UTCEPSS rescore
  6. 2026-06-12 23:09 UTCEPSS rescore
  7. 2026-06-10 22:15 UTCEPSS rescore
  8. 2026-06-10 13:19 UTCEPSS rescore
  9. 2026-06-08 14:14 UTCEPSS rescore
  10. 2026-06-08 14:14 UTCEPSS rescore
  11. 2026-06-07 15:22 UTCEPSS rescore
  12. 2026-06-07 15:22 UTCEPSS rescore
  13. 2026-06-06 13:45 UTCEPSS rescore
  14. 2026-06-06 13:45 UTCEPSS rescore
  15. 2026-06-05 22:44 UTCEPSS rescore
  16. 2026-06-05 06:08 UTCEPSS rescore
  17. 2026-06-05 06:08 UTCEPSS rescore
  18. 2026-06-04 13:10 UTCEPSS rescore
  19. 2026-06-02 20:11 UTCEPSS rescore
  20. 2026-06-02 20:11 UTCEPSS rescore
  21. 2026-06-01 13:49 UTCEPSS rescore
  22. 2026-05-31 22:28 UTCEPSS rescore
  23. 2026-05-31 22:28 UTCEPSS rescore
  24. 2026-05-31 00:14 UTCEPSS rescore
  25. 2026-05-31 00:14 UTCEPSS rescore
  26. 2026-05-29 13:41 UTCEPSS rescore
  27. 2026-05-28 13:42 UTCEPSS rescore
  28. 2026-05-28 13:42 UTCEPSS rescore
  29. 2026-05-27 13:38 UTCEPSS rescore
  30. 2026-05-27 13:38 UTCEPSS rescore
  31. 2026-05-26 13:42 UTCEPSS rescore
  32. 2026-05-26 13:42 UTCEPSS rescore
  33. 2026-05-26 07:17 UTCEPSS rescore
  34. 2026-05-26 07:17 UTCEPSS rescore
  35. 2026-05-22 21:15 UTCEPSS rescore
  36. 2026-05-22 21:15 UTCEPSS rescore
  37. 2026-05-22 21:15 UTCEPSS rescore
  38. 2026-05-22 21:15 UTCEPSS rescore
  39. 2026-05-22 21:15 UTCEPSS rescore
  40. 2026-05-21 22:40 UTCEPSS rescore
  41. 2026-05-20 22:37 UTCEPSS rescore
  42. 2026-05-20 22:37 UTCEPSS rescore
  43. 2026-05-20 22:37 UTCEPSS rescore
  44. 2026-05-20 11:21 UTCEPSS rescore
  45. 2026-05-20 11:21 UTCEPSS rescore
  46. 2026-05-20 09:18 UTCEG score recompute
  47. 2026-05-20 09:18 UTCGHSA enrichment
  48. 2026-05-20 05:34 UTCEG score recompute
  49. 2026-05-20 05:34 UTCGHSA enrichment
  50. 2026-05-20 01:50 UTCEG score recompute
  51. 2026-05-20 01:50 UTCGHSA enrichment
  52. 2026-05-19 22:06 UTCEG score recompute
  53. 2026-05-19 22:06 UTCGHSA enrichment
  54. 2026-05-19 18:22 UTCEG score recompute
  55. 2026-05-19 18:22 UTCGHSA enrichment
  56. 2026-05-19 14:38 UTCEG score recompute
  57. 2026-05-19 14:38 UTCGHSA enrichment
  58. 2026-05-19 10:54 UTCEG score recompute
  59. 2026-05-19 10:54 UTCGHSA enrichment
  60. 2026-05-19 07:08 UTCEG score recompute
  61. 2026-05-19 07:08 UTCGHSA enrichment
  62. 2026-05-19 03:22 UTCEG score recompute
  63. 2026-05-19 03:22 UTCGHSA enrichment
  64. 2026-05-18 23:38 UTCEG score recompute
  65. 2026-05-18 21:30 UTCEPSS rescore

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-42050✓ verified
    First seen May 23, 2017

    Apple macOS/iOS - NSUnarchiver Heap Corruption Due to Lack of Bounds Checking in [NSBuiltinCharacterSet initWithCoder:]

    Open source ↗

Frequently asked(5)

What is CVE-2017-2523?
CVE-2017-2523 is a critical vulnerability published on May 22, 2017. An issue was discovered in certain Apple products. iOS before 10.3.2 is affected. macOS before 10.12.5 is affected. tvOS before 10.2.1 is affected. watchOS before 3.2.2 is affected. The issue involves the "Foundation" component. It allows remote attackers to execute arbitrary code or cause a denial…
When was CVE-2017-2523 disclosed?
CVE-2017-2523 was first published in the National Vulnerability Database on May 22, 2017, with the most recent update on May 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2017-2523 actively exploited?
CVE-2017-2523 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 95.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2017-2523?
CVE-2017-2523 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2017-2523?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2017-2523, 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.

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