CVE-2023-29552

CRITICALNVD 7.59.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2023-11-08), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 7.5 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 4 sources updated this weekExploited in the wild
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • 1,100 internet-exposed hosts are running an affected version right now
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 66%CVSS: 7.5Exploit: cisa kev · ssvc active · epss top5pct · epss highExposed: 1,100

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

The Service Location Protocol (SLP, RFC 2608) allows an unauthenticated, remote attacker to register arbitrary services. This could allow the attacker to use spoofed UDP traffic to conduct a denial-of-service attack with a significant amplification factor.

Live · internet exposure

1,100 internet-exposed hosts are running an affected version of CVE-2023-29552 right now.

across 92 countries (United States, France, Brazil, Thailand, China)top: esxi
See the live KEV-Exposure radar →Found passively from public internet-scan data — aggregate, host-redacted.

EchelonGraph is the only CVE feed that fuses live vulnerability intelligence with its own live internet-exposure radar — so you see not just that a CVE is exploited, but how much of the internet is exposed to it right now.

CVSS v3
7.5
EG Score
9.0(high)
EG Risk
96(Attend)
EG Risk 96/100SSVC: Attend

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
Severity90% × 45%
Exploitation100% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
66%
EPSS %ILE
99%
KEV
⚠ Exploited

Published

April 25, 2023

Last Modified

October 31, 2025

Advisory Details (8)

Auto-updated Jun 4, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa.
generic🔴 Active Exploitation

CVE-2023-29552 Service Location Protocol-Denial of Service Amplification Attack - Cureblog

https://curesec.com/blog/article/CVE-2023-29552-Service-Location-Protocol-Denial-of-Service-Amplification-Attack-212.html
generic

VMware Response to CVE-2023-29552 - Reflective Denial-of-Service (DoS) Amplification Vulnerability in SLP - VMware Security Blog - VMware

https://blogs.vmware.com/security/2023/04/vmware-response-to-cve-2023-29552-reflective-denial-of-service-dos-amplification-vulnerability-in-slp.html
generic

SUSE Customer Portal

https://www.suse.com/support/kb/doc/?id=000021051
cisa Patch Available

Abuse of the Service Location Protocol May Lead to DoS Attacks | CISA

https://www.cisa.gov/news-events/alerts/2023/04/25/abuse-service-location-protocol-may-lead-dos-attacks
generic

New high-severity vulnerability (CVE-2023-29552) discovered in the Service Location Protocol (SLP) | Bitsight

https://www.bitsight.com/blog/new-high-severity-vulnerability-cve-2023-29552-discovered-service-location-protocol-slp
generic

NetApp Product Security

https://security.netapp.com/advisory/ntap-20230426-0001/
generic

GitHub - curesec/slpload: service location protocol amplified denial of service attack verification tool · GitHub

https://github.com/curesec/slpload
generic

RFC 2608 - Service Location Protocol, Version 2

https://datatracker.ietf.org/doc/html/rfc2608

Data Freshness Timeline

(refreshed 44× in last 7d / 228× 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.

Showing the most recent 100 of 458 total refreshes for this CVE.

  1. 2026-07-27 03:32 UTCGHSA enrichment
  2. 2026-07-26 23:51 UTCGHSA enrichment
  3. 2026-07-26 20:12 UTCGHSA enrichment
  4. 2026-07-26 16:34 UTCEG score recompute
  5. 2026-07-26 16:34 UTCGHSA enrichment
  6. 2026-07-26 14:52 UTCEPSS rescore
  7. 2026-07-26 14:52 UTCEPSS rescore
  8. 2026-07-26 12:56 UTCEG score recompute
  9. 2026-07-26 12:56 UTCGHSA enrichment
  10. 2026-07-26 09:18 UTCGHSA enrichment
  11. 2026-07-26 05:39 UTCGHSA enrichment
  12. 2026-07-26 01:57 UTCEG score recompute
  13. 2026-07-26 01:57 UTCGHSA enrichment
  14. 2026-07-25 14:16 UTCEPSS rescore
  15. 2026-07-24 14:15 UTCEPSS rescore
  16. 2026-07-23 02:21 UTCEG score recompute
  17. 2026-07-22 22:43 UTCEG score recompute
  18. 2026-07-22 22:43 UTCGHSA enrichment
  19. 2026-07-22 19:40 UTCCISA KEV update
  20. 2026-07-22 19:03 UTCGHSA enrichment
  21. 2026-07-22 15:24 UTCEG score recompute
  22. 2026-07-22 15:24 UTCGHSA enrichment
  23. 2026-07-22 14:06 UTCEPSS rescore
  24. 2026-07-22 14:06 UTCEPSS rescore
  25. 2026-07-22 11:45 UTCGHSA enrichment
Show 75 more
  1. 2026-07-22 08:06 UTCGHSA enrichment
  2. 2026-07-22 04:28 UTCGHSA enrichment
  3. 2026-07-22 00:50 UTCGHSA enrichment
  4. 2026-07-21 21:10 UTCGHSA enrichment
  5. 2026-07-21 17:32 UTCEG score recompute
  6. 2026-07-21 17:32 UTCGHSA enrichment
  7. 2026-07-21 15:23 UTCEPSS rescore
  8. 2026-07-21 14:37 UTCCISA KEV update
  9. 2026-07-21 13:54 UTCGHSA enrichment
  10. 2026-07-21 10:16 UTCGHSA enrichment
  11. 2026-07-21 06:39 UTCGHSA enrichment
  12. 2026-07-21 03:00 UTCGHSA enrichment
  13. 2026-07-20 23:21 UTCGHSA enrichment
  14. 2026-07-20 19:43 UTCEG score recompute
  15. 2026-07-20 19:43 UTCGHSA enrichment
  16. 2026-07-20 17:06 UTCEPSS rescore
  17. 2026-07-20 16:05 UTCGHSA enrichment
  18. 2026-07-20 12:28 UTCGHSA enrichment
  19. 2026-07-20 08:50 UTCGHSA enrichment
  20. 2026-07-20 05:12 UTCGHSA enrichment
  21. 2026-07-20 01:35 UTCGHSA enrichment
  22. 2026-07-19 21:56 UTCGHSA enrichment
  23. 2026-07-19 18:18 UTCGHSA enrichment
  24. 2026-07-19 14:40 UTCGHSA enrichment
  25. 2026-07-19 11:02 UTCGHSA enrichment
  26. 2026-07-19 07:24 UTCGHSA enrichment
  27. 2026-07-19 03:46 UTCEG score recompute
  28. 2026-07-19 03:46 UTCGHSA enrichment
  29. 2026-07-19 02:27 UTCEPSS rescore
  30. 2026-07-19 02:27 UTCEPSS rescore
  31. 2026-07-19 00:07 UTCGHSA enrichment
  32. 2026-07-18 20:30 UTCGHSA enrichment
  33. 2026-07-18 16:52 UTCGHSA enrichment
  34. 2026-07-18 13:14 UTCGHSA enrichment
  35. 2026-07-18 09:36 UTCGHSA enrichment
  36. 2026-07-18 05:58 UTCGHSA enrichment
  37. 2026-07-18 02:20 UTCGHSA enrichment
  38. 2026-07-17 22:42 UTCGHSA enrichment
  39. 2026-07-17 19:04 UTCGHSA enrichment
  40. 2026-07-17 15:25 UTCGHSA enrichment
  41. 2026-07-17 11:47 UTCGHSA enrichment
  42. 2026-07-17 08:08 UTCEG score recompute
  43. 2026-07-17 08:08 UTCGHSA enrichment
  44. 2026-07-17 04:30 UTCGHSA enrichment
  45. 2026-07-17 00:52 UTCGHSA enrichment
  46. 2026-07-16 21:15 UTCGHSA enrichment
  47. 2026-07-16 17:37 UTCGHSA enrichment
  48. 2026-07-16 17:04 UTCCISA KEV update
  49. 2026-07-16 17:01 UTCEPSS rescore
  50. 2026-07-16 17:01 UTCEPSS rescore
  51. 2026-07-16 13:59 UTCGHSA enrichment
  52. 2026-07-16 10:22 UTCGHSA enrichment
  53. 2026-07-16 06:44 UTCGHSA enrichment
  54. 2026-07-16 03:04 UTCGHSA enrichment
  55. 2026-07-15 23:26 UTCGHSA enrichment
  56. 2026-07-15 19:48 UTCGHSA enrichment
  57. 2026-07-15 16:56 UTCEPSS rescore
  58. 2026-07-15 16:56 UTCEPSS rescore
  59. 2026-07-15 16:49 UTCCISA KEV update
  60. 2026-07-15 16:10 UTCGHSA enrichment
  61. 2026-07-15 15:04 UTCCISA KEV update
  62. 2026-07-15 12:32 UTCGHSA enrichment
  63. 2026-07-15 08:54 UTCGHSA enrichment
  64. 2026-07-15 05:16 UTCGHSA enrichment
  65. 2026-07-15 01:37 UTCGHSA enrichment
  66. 2026-07-14 21:59 UTCGHSA enrichment
  67. 2026-07-14 18:20 UTCGHSA enrichment
  68. 2026-07-14 18:05 UTCCISA KEV update
  69. 2026-07-14 14:42 UTCGHSA enrichment
  70. 2026-07-14 11:03 UTCGHSA enrichment
  71. 2026-07-14 07:25 UTCGHSA enrichment
  72. 2026-07-14 03:47 UTCGHSA enrichment
  73. 2026-07-14 00:09 UTCGHSA enrichment
  74. 2026-07-13 22:28 UTCEPSS rescore
  75. 2026-07-13 22:28 UTCEPSS rescore

Frequently asked(6)

What is CVE-2023-29552?
CVE-2023-29552 is a critical vulnerability published on April 25, 2023. The Service Location Protocol (SLP, RFC 2608) allows an unauthenticated, remote attacker to register arbitrary services. This could allow the attacker to use spoofed UDP traffic to conduct a denial-of-service attack with a significant amplification factor.
When was CVE-2023-29552 disclosed?
CVE-2023-29552 was first published in the National Vulnerability Database on April 25, 2023, with the most recent update on October 31, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-29552 actively exploited?
Yes. CISA added CVE-2023-29552 to the Known Exploited Vulnerabilities catalog on November 8, 2023, affecting IETF Service Location Protocol (SLP). KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2023-29552?
CVE-2023-29552 has a CVSS v3 base score of 7.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2023-29552?
CVE-2023-29552 affects IETF Service Location Protocol (SLP). The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2023-29552?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-29552, 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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