CVE-2023-1671

CRITICALNVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score elevated to 9.8 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2023-11-16), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 9.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 3 sources updated this weekExploited in the wild
9.8
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 100%CVSS: 9.8Exploit: NoneExposed: 0

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

A pre-auth command injection vulnerability in the warn-proceed handler of Sophos Web Appliance older than version 4.3.10.4 allows execution of arbitrary code.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
99(Act)
EG Risk 99/100SSVC: Act

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
Severity98% × 45%
Exploitation100% × 40%
Automatability100% × 15%
Action: Fix now — active exploitation, automatable, high impact.
EPSS
100.0%
KEV
⚠ Exploited

Published

April 4, 2023

Last Modified

October 27, 2025

Advisory Details (2)

Auto-updated Jun 1, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-1671
generic🔴 Active Exploitation
https://www.sophos.com/en-us/security-advisories/sophos-sa-20230404-swa-rce

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 29× in last 7d / 168× 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 328 total refreshes for this CVE.

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

Publicly available exploits

(4 references)

Working exploit code is in the public domain (2 GitHub PoCs) (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-51396
    First seen Apr 25, 2023

    Sophos Web Appliance 4.3.10.4 - Pre-auth command injection

    Open source ↗
  • GitHub PoCW01fh4cker/CVE-2023-1671-POC
    First seen Apr 24, 2023

    CVE-2023-1671-POC, based on dnslog platform

    Open source ↗
  • GitHub PoCohnonoyesyes/CVE-2023-1671
    First seen Apr 23, 2023

    Pre-Auth RCE in Sophos Web Appliance

    Open source ↗
  • Nucleihttp/cves/2023/CVE-2023-1671.yaml
    First seen Jan 1, 2023

    Sophos Web Appliance - Remote Code Execution

    Open source ↗

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2023-1671?
CVE-2023-1671 is a critical vulnerability published on April 4, 2023. A pre-auth command injection vulnerability in the warn-proceed handler of Sophos Web Appliance older than version 4.3.10.4 allows execution of arbitrary code.
When was CVE-2023-1671 disclosed?
CVE-2023-1671 was first published in the National Vulnerability Database on April 4, 2023, with the most recent update on October 27, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-1671 actively exploited?
Yes. CISA added CVE-2023-1671 to the Known Exploited Vulnerabilities catalog on November 16, 2023, affecting Sophos Web Appliance. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2023-1671?
CVE-2023-1671 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2023-1671?
CVE-2023-1671 affects Sophos Web Appliance. 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-2023-1671?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-1671, 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

Explore the affected products and dependency analysis for CVE-2023-1671

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