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CVE-2026-77482

HIGH 8.8 ALL-YEARS

Published 2026-09-08 · Last modified 2026-10-14 · microsoft · NVD: Analyzed

Heap-based buffer overflow in SQL Server allows an unauthorized attacker to execute code over a network.

ELEVATED IMPACT

Severe if exploited (CVSS 8.8), but no confirmed exploitation. Patch on a normal cadence.

Exploitation likelihood

0.8%chance of exploitation in 30 days · 57th percentile

○ In CISA KEV○ Catalogued PoC◆ SSVC: exploitation none, automatable no

Impact if exploited

8.8CVSS 3.1 · HIGH · CNA

  • ConfidentialityHigh
  • IntegrityHigh
  • AvailabilityHigh

What an attacker needs

  • ✓Access: Reachable over the network — no local access needed
  • ✓Privileges: No account or privileges required
  • ⚠User interaction: A user must take an action (click / open a file)
  • ✓Complexity: No special conditions — reliably repeatable

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

No public PoC is currently catalogued.

Search for new PoCs

Search GitHub now — results may be empty or unverified.

Tracked sources are checked weekly for the full archive, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.

Affected

Vendors Microsoft

Products Microsoft Sql Server 2017 (Cu 31) Microsoft Sql Server 2017 (Gdr) Microsoft Sql Server 2019 (Cu 32) Microsoft Sql Server 2019 (Gdr) Sql Server 2017 Sql Server 2019

Weakness (CWE)

  • CWE-122: : Heap-based Buffer Overflow

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

References and research data (JSON)

Known Affected Software Configurations

VendorProductVersion range
MicrosoftSql Server 2017< 14.0.2130.4
MicrosoftSql Server 2017≥ 14.0.3006.16 and < 14.0.3550.4
MicrosoftSql Server 2019< 15.0.2190.7
MicrosoftSql Server 2019≥ 15.0.4003.23 and < 15.0.4490.9

All CVSS metrics

  • HIGH 8.8 v3.1 · CNA Primary
    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
  • HIGH 8.8 v3.1 · NVD Secondary
    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References

Patches & mitigations

Advisories

Sources: NVD · CVE.org · All sources and attribution · EPSS