7.5

CVE-2025-54939: litespeedtech litespeed_web_adc

CVSS: 7.5v3.1HighAnalyzed
Published 01-08-2025Last modified 20-08-2025
Open JSON

Vulnerability summary

CVE-2025-54939 is a high (CVSS 7.5) vulnerability in litespeedtech litespeed_web_adc. EPSS estimates a 0.80% chance of exploitation in the next 30 days, higher than 55.6% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
40/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
0.80%
0%100%
Low · +0.02 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Timeline

  1. 01-08-2025
    PublishedVulnerability first disclosed.
  2. 20-08-2025
    Last modifiedVulnerability information updated.

Description

LiteSpeed QUIC (LSQUIC) Library before 4.3.1 has an lsquic_engine_packet_in memory leak.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.80%

Chance of exploitation in the next 30 days

Percentile

56%

Versus all other CVEs

30-day change

+0.02 pp

From 0.77% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.80%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (imperva.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Litespeedtech4 products

1 vendor · 4 products

References

4 links