CVE-2022-3620

MEDIUMNVD 5.69.8▲
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-10-21. NVD baseline CVSS 5.6; sources differ by 4.2.

Triggered by: GitHub Security Advisory CVSS
Sources: ghsa, nvd
5.6
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 1%CVSS: 5.6Exploit: NoneExposed: 0

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

A vulnerability was found in Exim and classified as problematic. This issue affects the function dmarc_dns_lookup of the file dmarc.c of the component DMARC Handler. The manipulation leads to use after free. The attack may be initiated remotely. The name of the patch is 12fb3842f81bcbd4a4519d5728f2d7e0e3ca1445. It is recommended to apply a patch to fix this issue. The associated identifier of this vulnerability is VDB-211919.

CVSS v3
5.6
EG Score
9.8(medium)
EPSS
50.1%
KEV
Not listed

Published

October 20, 2022

Last Modified

May 23, 2025

References (10)

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 49× 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. 2026-07-15 01:58 UTCEPSS rescore
  2. 2026-07-15 01:58 UTCEPSS rescore
  3. 2026-07-13 22:28 UTCEPSS rescore
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  5. 2026-07-13 06:11 UTCEPSS rescore
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  7. 2026-07-13 05:07 UTCOSV refresh
  8. 2026-07-12 05:44 UTCEPSS rescore
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  10. 2026-07-11 08:25 UTCEPSS rescore
  11. 2026-07-09 19:08 UTCEPSS rescore
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  21. 2026-07-01 15:04 UTCEPSS rescore
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  1. 2026-06-28 04:54 UTCEPSS rescore
  2. 2026-06-27 03:07 UTCEPSS rescore
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  4. 2026-06-25 13:48 UTCEPSS rescore
  5. 2026-06-25 13:48 UTCEPSS rescore
  6. 2026-06-24 16:31 UTCOSV refresh
  7. 2026-06-24 14:03 UTCEPSS rescore
  8. 2026-06-24 14:03 UTCEPSS rescore
  9. 2026-06-23 21:31 UTCEPSS rescore
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  11. 2026-06-22 14:24 UTCEPSS rescore
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  15. 2026-06-21 01:58 UTCEPSS rescore
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  17. 2026-06-19 19:24 UTCEPSS rescore
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  19. 2026-06-18 17:51 UTCEPSS rescore
  20. 2026-06-18 17:51 UTCEPSS rescore
  21. 2026-06-17 17:51 UTCEPSS rescore
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  23. 2026-06-16 17:51 UTCEPSS rescore
  24. 2026-06-15 17:46 UTCEPSS rescore
  25. 2026-06-14 23:15 UTCEPSS rescore
  26. 2026-06-13 22:58 UTCEPSS rescore
  27. 2026-06-12 23:10 UTCEPSS rescore
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  29. 2026-06-11 13:58 UTCEPSS rescore
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  31. 2026-06-10 22:17 UTCEPSS rescore
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  33. 2026-06-08 14:15 UTCEPSS rescore
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  35. 2026-06-07 19:16 UTCOSV refresh
  36. 2026-06-07 15:23 UTCEPSS rescore
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  38. 2026-06-06 13:46 UTCEPSS rescore
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  43. 2026-06-05 06:09 UTCEPSS rescore
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  45. 2026-06-04 13:11 UTCEPSS rescore
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  47. 2026-06-02 20:11 UTCEPSS rescore
  48. 2026-06-02 20:11 UTCEPSS rescore
  49. 2026-06-01 13:50 UTCEPSS rescore
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  51. 2026-05-31 22:29 UTCEPSS rescore
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  56. 2026-05-29 13:43 UTCEPSS rescore
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  60. 2026-05-27 13:39 UTCEPSS rescore
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  64. 2026-05-26 07:17 UTCEPSS rescore
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  67. 2026-05-24 16:51 UTCEPSS rescore
  68. 2026-05-23 09:19 UTCEG score recompute
  69. 2026-05-23 09:19 UTCGHSA enrichment

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Frequently asked(5)

What is CVE-2022-3620?
CVE-2022-3620 is a medium vulnerability published on October 20, 2022. A vulnerability was found in Exim and classified as problematic. This issue affects the function dmarcdnslookup of the file dmarc.c of the component DMARC Handler. The manipulation leads to use after free. The attack may be initiated remotely. The name of the patch is…
When was CVE-2022-3620 disclosed?
CVE-2022-3620 was first published in the National Vulnerability Database on October 20, 2022, with the most recent update on May 23, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2022-3620 actively exploited?
CVE-2022-3620 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 50.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2022-3620?
CVE-2022-3620 has a CVSS v3 base score of 5.6 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.8.
How do I remediate CVE-2022-3620?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-3620, 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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