CVE-2025-66877: Buffer overflow vulnerability in function dcputchar in decompile.c in libming 0.4.8.

This week

HIGH 7.5REMOTEDOWNGRADE

CVE-2025-66877 is a high-severity flaw (CVSS 7.5) affecting libming. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow vulnerability in function dcputchar in decompile.c in libming 0.4.8.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 74%)
CISA exploited list	No
Weakness	CWE-121
Published	2025-12-29
Last modified	2026-10-07

Publisher (CNA): MITRE · Vendor: libming

Last updated 2026-10-07 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-12-29 18:15 UTCPublished CVE record published
2026-10-07 12:10 UTCUpdated Record last modified

libming libming DOWNGRADE

Affected: 0.4.8

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.4.8

1. Check installed version

apt-cache policy libming || rpm -q libming || libming --version

2. No fixed release: DOWNGRADE to a release before 0.4.8 (Debian / Ubuntu)

apt-cache madison libming sudo apt install libming=<VERSION_BEFORE_0.4.8> sudo apt-mark hold libming

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list libming sudo dnf downgrade libming-<VERSION_BEFORE_0.4.8> sudo dnf versionlock add libming

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-66877?

libming: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-66877 being exploited?

CVE-2025-66877 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-66877 affect?

CVE-2025-66877 affects libming. Severity is high (CVSS 7.5). Buffer overflow vulnerability in function dcputchar in decompile.c in libming 0.4.8.

How urgent is CVE-2025-66877?

Priority 43/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2025-66869 HIGH 7.5 DOWNGRADE Buffer overflow vulnerability in function strcat in asan_interceptors.cpp in libming 0.4.8.
CVE-2025-29497 MEDIUM 6.5 DOWNGRADE libming v0.4.8 was discovered to contain a memory leak via the parseSWF_MORPHFILLSTYLES function.
CVE-2025-29496 MEDIUM 6.5 DOWNGRADE libming v0.4.8 was discovered to contain a segmentation fault via the decompileDUPLICATECLIP function
CVE-2025-29494 MEDIUM 6.5 DOWNGRADE libming v0.4.8 was discovered to contain a segmentation fault via the decompileGETMEMBER function
CVE-2025-29493 MEDIUM 6.5 DOWNGRADE libming v0.4.8 was discovered to contain a segmentation fault via the decompileGETPROPERTY function

References

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