CVE-2026-73522

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-17. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 2%CVSS: 7.5Exploit: None knownExposed: 0

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

COVESA Open1722 through 0.9.2 contains a stack buffer overflow vulnerability that allows unauthenticated remote attackers to write past the end of a fixed 15-slot stack array by sending a crafted UDP datagram containing more than 15 ACF-CAN messages. The avtp_to_can() function increments its write index without bounding it against the caller-supplied array size, and because the listener accepts datagrams from any sender matching a hardcoded unauthenticated stream ID transmitted in plaintext, attackers can corrupt adjacent stack memory to achieve arbitrary code execution or denial of service.

CVSS v3
7.5
EG Score
7.5(high)
EG Risk
50(Track)
EG Risk 50/100SSVC: 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
Severity75% × 45%
Exploitation2% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
2%
EPSS %ILE
82%
KEV
Not listed

Published

August 17, 2026

Last Modified

August 18, 2026

Advisory Details (2)

Auto-updated Aug 17, 2026
No patch confirmed yet.
generic

COVESA Open1722 0.9.2 Stack Buffer Overflow via avtp_to_can() in acf-can-listener | Advisories | VulnCheck

https://www.vulncheck.com/advisories/covesa-open1722-stack-buffer-overflow-via-avtp-to-can-in-acf-can-listener
generic

acf-can-listener: stack buffer overflow and stack memory disclosure from one UDP datagram (CVE-2026-73522, CVE-2026-73523) · Issue #154 · COVESA/Open1722 · GitHub

https://github.com/COVESA/Open1722/issues/154

Vendor Advisories for CVE-2026-73522(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 20× in last 7d / 20× 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. 2026-08-21 08:26 UTCEG score recompute
  2. 2026-08-21 08:26 UTCGHSA enrichment
  3. 2026-08-20 22:56 UTCEPSS rescore
  4. 2026-08-20 19:43 UTCGHSA enrichment
  5. 2026-08-20 07:00 UTCGHSA enrichment
  6. 2026-08-19 18:17 UTCEG score recompute
  7. 2026-08-19 18:17 UTCGHSA enrichment
  8. 2026-08-19 17:04 UTCEPSS rescore
  9. 2026-08-19 04:12 UTCGHSA enrichment
  10. 2026-08-18 15:25 UTCEG score recompute
  11. 2026-08-18 15:24 UTCGHSA enrichment
  12. 2026-08-18 15:08 UTCEG score recompute
  13. 2026-08-18 15:08 UTCGHSA enrichment
  14. 2026-08-18 13:49 UTCEPSS rescore
  15. 2026-08-18 13:49 UTCEPSS rescore
  16. 2026-08-18 07:11 UTCEG score recompute
  17. 2026-08-18 07:11 UTCGHSA enrichment
  18. 2026-08-17 18:28 UTCEG score recompute
  19. 2026-08-17 18:00 UTCEG score recompute
  20. 2026-08-17 18:00 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-73522?
CVE-2026-73522 is a high vulnerability published on August 17, 2026. COVESA Open1722 through 0.9.2 contains a stack buffer overflow vulnerability that allows unauthenticated remote attackers to write past the end of a fixed 15-slot stack array by sending a crafted UDP datagram containing more than 15 ACF-CAN messages. The avtptocan() function increments its write…
When was CVE-2026-73522 disclosed?
CVE-2026-73522 was first published in the National Vulnerability Database on August 17, 2026, with the most recent update on August 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-73522 actively exploited?
CVE-2026-73522 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2% probability of exploitation in the next 30 days, which ranks it in the top 17.6% of all scored CVEs.
What is the CVSS score of CVE-2026-73522?
CVE-2026-73522 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-73522?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-73522, 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

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