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
Exploited in the wild
9.8EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 100%CVSS: 9.8Exploit: cisa kev · ssvc active · epss top5pct · epss high · public exploitExposed: 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 PROB
100%
EPSS %ILE
100%
KEV
⚠ Exploited

Published

April 4, 2023

Last Modified

October 27, 2025

Advisory Details (3)

Auto-updated Sep 3, 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

Sophos Web Appliance 4.3.10.4 Resolves Security Vulnerabilities | Sophos

https://www.sophos.com/en-us/security-advisories/sophos-sa-20230404-swa-rce
generic

Banned | Packet Storm

http://packetstormsecurity.com/files/172016/Sophos-Web-Appliance-4.3.10.4-Command-Injection.html

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 42× in last 7d / 179× 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 599 total refreshes for this CVE.

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