CVE-2026-19844

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-14. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 5 sources updated this weekElevated
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: Elevated riskExposed: 0

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

A vulnerability was found in TOTOLINK A800R 4.1.2cu.5137_B20200730. The impacted element is the function setRadvdCfg of the file /cgi-bin/cstecgi.cgi of the component ipv6.so. Performing a manipulation of the argument radvdinterfacename results in stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been made public and could be used.

CVSS v3
8.8
EG Score
8.8(high)
EG Risk
56(Track*)
EG Risk 56/100SSVC: 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
Severity88% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
40%
KEV
Not listed

Published

August 14, 2026

Last Modified

August 18, 2026

Advisory Details (2)

Auto-updated Aug 14, 2026
No patch confirmed yet.
generic

TOTOLINK | Wi-Fi 7, Mesh, 5G & Enterprise Networking

https://www.totolink.net/
generic

vuls/totolink/a800r/setRadvdCfg.md at main · panda666-888/vuls · GitHub

https://github.com/panda666-888/vuls/blob/main/totolink/a800r/setRadvdCfg.md

Vendor Advisories for CVE-2026-19844(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 35× in last 7d / 35× 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. 2026-08-20 23:20 UTCEG score recompute
  2. 2026-08-20 23:20 UTCGHSA enrichment
  3. 2026-08-20 22:55 UTCEPSS rescore
  4. 2026-08-20 12:04 UTCGHSA enrichment
  5. 2026-08-20 00:46 UTCEG score recompute
  6. 2026-08-20 00:46 UTCGHSA enrichment
  7. 2026-08-19 17:03 UTCEPSS rescore
  8. 2026-08-19 13:25 UTCGHSA enrichment
  9. 2026-08-19 02:09 UTCEG score recompute
  10. 2026-08-19 02:09 UTCGHSA enrichment
  11. 2026-08-18 14:52 UTCEG score recompute
  12. 2026-08-18 14:52 UTCGHSA enrichment
  13. 2026-08-18 13:51 UTCEG score recompute
  14. 2026-08-18 13:51 UTCGHSA enrichment
  15. 2026-08-18 13:48 UTCEPSS rescore
  16. 2026-08-18 13:45 UTCMITRE cvelistV5CVSS v4 → 8.7
  17. 2026-08-18 02:28 UTCGHSA enrichment
  18. 2026-08-17 15:12 UTCEG score recompute
  19. 2026-08-17 15:12 UTCGHSA enrichment
  20. 2026-08-17 13:47 UTCEPSS rescore
  21. 2026-08-17 03:56 UTCGHSA enrichment
  22. 2026-08-16 16:40 UTCEG score recompute
  23. 2026-08-16 16:40 UTCGHSA enrichment
  24. 2026-08-16 14:56 UTCEPSS rescore
  25. 2026-08-16 05:20 UTCEG score recompute
Show 10 more
  1. 2026-08-16 05:20 UTCGHSA enrichment
  2. 2026-08-16 02:14 UTCEPSS rescore
  3. 2026-08-15 18:04 UTCGHSA enrichment
  4. 2026-08-15 06:47 UTCGHSA enrichment
  5. 2026-08-14 19:16 UTCEG score recompute
  6. 2026-08-14 19:16 UTCGHSA enrichment
  7. 2026-08-14 17:33 UTCEG score recompute
  8. 2026-08-14 17:33 UTCNVD updateCVSS v4 → 7.4
  9. 2026-08-14 17:06 UTCEG score recompute
  10. 2026-08-14 17:05 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-19844?
CVE-2026-19844 is a high vulnerability published on August 14, 2026. A vulnerability was found in TOTOLINK A800R 4.1.2cu.5137_B20200730. The impacted element is the function setRadvdCfg of the file /cgi-bin/cstecgi.cgi of the component ipv6.so. Performing a manipulation of the argument radvdinterfacename results in stack-based buffer overflow. It is possible to…
When was CVE-2026-19844 disclosed?
CVE-2026-19844 was first published in the National Vulnerability Database on August 14, 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-2026-19844 actively exploited?
CVE-2026-19844 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 59.6% of all scored CVEs.
What is the CVSS score of CVE-2026-19844?
CVE-2026-19844 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-19844?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-19844, 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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