CVE-2026-45160

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 84% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 0

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

ESF-IDF is the Espressif Internet of Things (IOT) Development Framework. In versions 5.2.7, 5.3.5, 5.4.4, 5.5.4, and 6.0.1, an out-of-bounds read flaw exists in the DHCP server option parser (parse_options() in components/lwip/apps/dhcpserver/dhcpserver.c) shipped with ESP-IDF's lwIP component. The parser walks the BOOTP/DHCP options field without validating that each option's length byte and declared payload length stay within the received packet buffer. A crafted DHCP request can cause the parser to read past the end of the options buffer into adjacent heap memory. The issue affects the DHCP server used by ESP-IDF's SoftAP and any configuration where the device runs as a DHCP server on a local network. This issue has been patched in versions 5.2.8, 5.3.6, 5.4.5, 5.5.5, and 6.0.2.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
34(Track)
EG Risk 34/100SSVC: Track

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
Severity65% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
16%
KEV
Not listed

Published

June 10, 2026

Last Modified

July 23, 2026

Advisory Details (7)

Auto-updated Jun 13, 2026
Patch available. Sources: github_commit, github.
github Patch Available

Out-of-bounds Read in lwIP DHCP Server Option Parser · Advisory · espressif/esp-idf · GitHub

https://github.com/espressif/esp-idf/security/advisories/GHSA-g764-gwc3-75m5
github_commit

commit fba5f995436a (espressif/esp-idf)

Fix landed in espressif/esp-idf commit fba5f995436a — awaiting tagged release

https://github.com/espressif/esp-idf/commit/fba5f995436a3e3139f768b6d8f1a74d5ce1d318
github_commit

commit d51b10760924 (espressif/esp-idf)

Fix landed in espressif/esp-idf commit d51b10760924 — awaiting tagged release

https://github.com/espressif/esp-idf/commit/d51b1076092487e533eadf8b48c9c8579d3a6712
github_commit

commit 9f713dbc9498 (espressif/esp-idf)

Fix landed in espressif/esp-idf commit 9f713dbc9498 — awaiting tagged release

https://github.com/espressif/esp-idf/commit/9f713dbc94982d917f2d12964b233cd9efa4aeba
github_commit

commit 8b4b5d530181 (espressif/esp-idf)

Fix landed in espressif/esp-idf commit 8b4b5d530181 — awaiting tagged release

https://github.com/espressif/esp-idf/commit/8b4b5d5301815198d177974ffc24848f47748248
github_commit

commit 2da2db43fd7e (espressif/esp-idf)

Fix landed in espressif/esp-idf commit 2da2db43fd7e — awaiting tagged release

https://github.com/espressif/esp-idf/commit/2da2db43fd7e0bcff9e7b95f54f388296bb6f911
github_commit

commit 2bf4dd12002d (espressif/esp-idf)

Fix landed in espressif/esp-idf commit 2bf4dd12002d — awaiting tagged release

https://github.com/espressif/esp-idf/commit/2bf4dd12002dbae60a4b21abff010ecb2b8ee82b

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 31× 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 125 total refreshes for this CVE.

  1. 2026-09-16 05:15 UTCEPSS rescore
  2. 2026-09-14 04:19 UTCEG score recompute
  3. 2026-09-13 16:47 UTCEPSS rescore
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  1. 2026-08-20 22:55 UTCEPSS rescore
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  5. 2026-08-18 13:48 UTCEPSS rescore
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  20. 2026-08-09 13:46 UTCEPSS rescore
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  22. 2026-08-08 16:37 UTCEPSS rescore
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  25. 2026-08-06 13:46 UTCEPSS rescore
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  27. 2026-08-05 19:17 UTCEPSS rescore
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  36. 2026-08-01 04:16 UTCEPSS rescore
  37. 2026-07-31 13:46 UTCEG score recompute
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  44. 2026-07-27 08:07 UTCEG score recompute
  45. 2026-07-26 14:54 UTCEPSS rescore
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  47. 2026-07-26 05:23 UTCEG score recompute
  48. 2026-07-25 14:18 UTCEPSS rescore
  49. 2026-07-24 14:17 UTCEPSS rescore
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  52. 2026-07-22 14:08 UTCEPSS rescore
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  66. 2026-07-08 15:16 UTCEPSS rescore
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  73. 2026-06-30 23:22 UTCEPSS rescore
  74. 2026-06-29 14:06 UTCEPSS rescore
  75. 2026-06-29 14:06 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2026-45160?
CVE-2026-45160 is a medium vulnerability published on June 10, 2026. ESF-IDF is the Espressif Internet of Things (IOT) Development Framework. In versions 5.2.7, 5.3.5, 5.4.4, 5.5.4, and 6.0.1, an out-of-bounds read flaw exists in the DHCP server option parser (parse_options() in components/lwip/apps/dhcpserver/dhcpserver.c) shipped with ESP-IDF's lwIP component. The…
When was CVE-2026-45160 disclosed?
CVE-2026-45160 was first published in the National Vulnerability Database on June 10, 2026, with the most recent update on July 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-45160 actively exploited?
CVE-2026-45160 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 84.0% of all scored CVEs.
What is the CVSS score of CVE-2026-45160?
CVE-2026-45160 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-45160?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-45160, 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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