Every CVE Search/ Get API key

CVE-2025-59777

NULL pointer dereference vulnerability exists in GNU libmicrohttpd v1.0.2 and earlier. The...

8.7 HighFix available

NULL pointer dereference vulnerability exists in GNU libmicrohttpd v1.0.2 and earlier. The vulnerability was fixed in commit ff13abc on the master branch of the libmicrohttpd Git repository, after the v1.0.2 tag. A specially crafted packet sent by an attacker could cause a denial-of-service (DoS) condition.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

0.48%Up 0.5 points since Nov 10, 2025
90%50%10%1%

What each source reports

CVE List Score used 8.7

NULL pointer dereference vulnerability exists in GNU libmicrohttpd v1.0.2 and earlier. The vulnerability was fixed in commit ff13abc on the master branch of the libmicrohttpd Git repository, after the v1.0.2 tag. A specially crafted packet sent by an attacker could cause a denial-of-service (DoS) condition.

Record
CVE-2025-59777
CVSS 4.0
8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-476
Updated
2026-11-02
EUVDEUVD-2025-41747 8.7

NULL pointer dereference vulnerability exists in GNU libmicrohttpd v1.0.2 and earlier. The vulnerability was fixed in commit ff13abc on the master branch of the libmicrohttpd Git repository, after the v1.0.2 tag. A specially crafted packet sent by an attacker could cause a denial-of-service (DoS) condition.

Record
EUVD-2025-41747
CVSS 4.0
8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-f6rc-8xc8-gmfm 8.7

NULL pointer dereference vulnerability exists in GNU libmicrohttpd v1.0.2 and earlier. The...

NULL pointer dereference vulnerability exists in GNU libmicrohttpd v1.0.2 and earlier. The vulnerability was fixed in commit ff13abc on the master branch of the libmicrohttpd Git repository, after the v1.0.2 tag. A specially crafted packet sent by an attacker could cause a denial-of-service (DoS) condition.

Record
GHSA-f6rc-8xc8-gmfm
CVSS 4.0
8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-476
Updated
2026-11-02
NVD 8.7

NULL pointer dereference vulnerability exists in GNU libmicrohttpd v1.0.2 and earlier. The vulnerability was fixed in commit ff13abc on the master branch of the libmicrohttpd Git repository, after the v1.0.2 tag. A specially crafted packet sent by an attacker could cause a denial-of-service (DoS) condition.

Record
CVE-2025-59777
CVSS 4.0
8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-476
Updated
2026-11-02
OSV 8.7

NULL pointer dereference vulnerability exists in GNU libmicrohttpd v1.0.2 and earlier. The vulnerability was fixed in commit ff13abc on the master branch of the libmicrohttpd Git repository, after the v1.0.2 tag. A specially crafted packet sent by an attacker could cause a denial-of-service (DoS) condition.

Record
CVE-2025-59777
CVSS 4.0
8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Updated
2026-11-02
OSVDEBIAN-CVE-2025-59777 8.7

NULL pointer dereference vulnerability exists in GNU libmicrohttpd v1.0.2 and earlier. The vulnerability was fixed in commit ff13abc on the master branch of the libmicrohttpd Git repository, after the v1.0.2 tag. A specially crafted packet sent by an attacker could cause a denial-of-service (DoS) condition.

Record
DEBIAN-CVE-2025-59777
CVSS 4.0
8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Updated
2026-11-02
Show 9 moreShow less
OSVUBUNTU-CVE-2025-59777 8.7

NULL pointer dereference vulnerability exists in GNU libmicrohttpd v1.0.2 and earlier. The vulnerability was fixed in commit ff13abc on the master branch of the libmicrohttpd Git repository, after the v1.0.2 tag. A specially crafted packet sent by an attacker could cause a denial-of-service (DoS) condition.

Record
UBUNTU-CVE-2025-59777
CVSS 4.0
8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVAZL-69980 No score

CVE-2025-59777 affecting package libmicrohttpd 0.9.76-1

NULL pointer dereference vulnerability exists in GNU libmicrohttpd v1.0.2 and earlier. The vulnerability was fixed in commit ff13abc on the master branch of the libmicrohttpd Git repository, after the v1.0.2 tag. A specially crafted packet sent by an attacker could cause a denial-of-service (DoS) condition.

Record
AZL-69980
Updated
2026-11-02
OSVAZL-70046 No score

CVE-2025-59777 affecting package libmicrohttpd for versions less than 0.9.77-4

NULL pointer dereference vulnerability exists in GNU libmicrohttpd v1.0.2 and earlier. The vulnerability was fixed in commit ff13abc on the master branch of the libmicrohttpd Git repository, after the v1.0.2 tag. A specially crafted packet sent by an attacker could cause a denial-of-service (DoS) condition.

Record
AZL-70046
Updated
2026-11-05
OSVopenSUSE-SU-2026:20016-1 No score

Security update for libmicrohttpd

This update for libmicrohttpd fixes the following issues:

  • CVE-2025-62689: Fixed heap-based buffer overflow through a specially crafted packet (bsc#1253178)
  • CVE-2025-59777: Fixed NULL pointer dereference through a specially crafted packet (bsc#1253177)
Record
openSUSE-SU-2026:20016-1
Updated
2026-11-02
OSVSUSE-SU-2025:21200-1 No score

Security update for libmicrohttpd

This update for libmicrohttpd fixes the following issues:

  • CVE-2025-59777: Fixed NULL pointer dereference (bsc#1253177).
  • CVE-2025-62689: Fixed heap-based buffer overflow(bsc#1253178).
Record
SUSE-SU-2025:21200-1
Updated
2026-11-02
OSVSUSE-SU-2025:4291-1 No score

Security update for libmicrohttpd

This update for libmicrohttpd fixes the following issues:

  • CVE-2025-59777: Fixed NULL pointer dereference via specially crafted packet sent by an attacker (bsc#1253177)
  • CVE-2025-62689: Fixed heap-based buffer overflow via specially crafted packet sent by an attacker (bsc#1253178)
Record
SUSE-SU-2025:4291-1
Updated
2026-11-02
OSVSUSE-SU-2026:20029-1 No score

Security update for libmicrohttpd

This update for libmicrohttpd fixes the following issues:

  • CVE-2025-62689: Fixed heap-based buffer overflow through a specially crafted packet (bsc#1253178)
  • CVE-2025-59777: Fixed NULL pointer dereference through a specially crafted packet (bsc#1253177)
Record
SUSE-SU-2026:20029-1
Updated
2026-11-02
OSVSUSE-SU-2026:20057-1 No score

Security update for libmicrohttpd

This update for libmicrohttpd fixes the following issues:

  • CVE-2025-59777: Fixed NULL pointer dereference (bsc#1253177).
  • CVE-2025-62689: Fixed heap-based buffer overflow(bsc#1253178).
Record
SUSE-SU-2026:20057-1
Updated
2026-11-02
OSVSUSE-SU-2026:20072-1 No score

Security update for libmicrohttpd

This update for libmicrohttpd fixes the following issues:

  • CVE-2025-62689: Fixed heap-based buffer overflow through a specially crafted packet (bsc#1253178)
  • CVE-2025-59777: Fixed NULL pointer dereference through a specially crafted packet (bsc#1253177)
Record
SUSE-SU-2026:20072-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
libmicrohttpd
Azure Linux:2
 through 0.9.76-1 None known
libmicrohttpd
Azure Linux:3
 before 0.9.77-4
0.9.77-4
libmicrohttpd
Debian:12
 All versions, plus listed versions
0.9.75-60.9.76-10.9.77-10.9.77-20.9.77-3
Show 21 moreShow less
1.0.0-11.0.0-1.1~exp11.0.0-21.0.0-2.11.0.0-2.1~exp11.0.1-11.0.1-21.0.1-31.0.1-41.0.10-11.0.2-11.0.2-1~exp11.0.2-21.0.3-11.0.4-11.0.4-21.0.5-11.0.6-11.0.7-11.0.8-11.0.9-1
 None known
libmicrohttpd
Debian:13
 All versions, plus listed versions
1.0.1-41.0.10-11.0.2-11.0.2-1~exp11.0.2-2
Show 8 moreShow less
1.0.3-11.0.4-11.0.4-21.0.5-11.0.6-11.0.7-11.0.8-11.0.9-1
 None known
libmicrohttpd
Debian:14
 All versions, plus listed versions
1.0.1-41.0.10-11.0.2-11.0.2-1~exp11.0.2-2
Show 8 moreShow less
1.0.3-11.0.4-11.0.4-21.0.5-11.0.6-11.0.7-11.0.8-11.0.9-1
 None known
libmicrohttpd
SUSE:Linux Micro 6.0
From an advisory covering 2 CVEs
 before 0.9.77-2.1
0.9.77-2.1
libmicrohttpd
SUSE:Linux Enterprise Module for Basesystem 15 SP6
From an advisory covering 2 CVEs
 before 0.9.77-150600.3.3.1
0.9.77-150600.3.3.1
libmicrohttpd
SUSE:Linux Enterprise Module for Basesystem 15 SP7
From an advisory covering 2 CVEs
 before 0.9.77-150600.3.3.1
0.9.77-150600.3.3.1
libmicrohttpd
SUSE:Linux Enterprise Module for Desktop Applications 15 SP6
From an advisory covering 2 CVEs
 before 0.9.77-150600.3.3.1
0.9.77-150600.3.3.1
libmicrohttpd
SUSE:Linux Enterprise Module for Desktop Applications 15 SP7
From an advisory covering 2 CVEs
 before 0.9.77-150600.3.3.1
0.9.77-150600.3.3.1
Show 15 moreShow less
Affected packages
PackageAffectedFixed
libmicrohttpd
openSUSE:Leap 15.6
From an advisory covering 2 CVEs
 before 0.9.77-150600.3.3.1
0.9.77-150600.3.3.1
libmicrohttpd
SUSE:Linux Enterprise Server 16.0
From an advisory covering 2 CVEs
 before 1.0.1-160000.3.1
1.0.1-160000.3.1
libmicrohttpd
SUSE:Linux Enterprise Server for SAP applications 16.0
From an advisory covering 2 CVEs
 before 1.0.1-160000.3.1
1.0.1-160000.3.1
libmicrohttpd
SUSE:Linux Micro 6.1
From an advisory covering 2 CVEs
 before 0.9.77-slfo.1.1_2.1
0.9.77-slfo.1.1_2.1
libmicrohttpd
SUSE:Linux Micro 6.2
From an advisory covering 2 CVEs
 before 1.0.1-160000.3.1
1.0.1-160000.3.1
libmicrohttpd
Ubuntu:14.04:LTS
 All versions, plus listed versions
0.9.27-20.9.32-10.9.33-1
 None known
libmicrohttpd
Ubuntu:16.04:LTS
 All versions, plus listed versions
0.9.37+dfsg-1ubuntu10.9.42+dfsg-20.9.44+dfsg-10.9.44+dfsg-1ubuntu10.9.44+dfsg-1ubuntu2
 None known
libmicrohttpd
Ubuntu:18.04:LTS
 All versions, plus listed versions
0.9.55-10.9.57-10.9.58-10.9.59-1
 None known
libmicrohttpd
Ubuntu:20.04:LTS
 All versions, plus listed versions
0.9.66-1
 None known
libmicrohttpd
Ubuntu:22.04:LTS
 All versions, plus listed versions
0.9.72-20.9.73-40.9.75-10.9.75-30.9.75-3ubuntu1
 None known
libmicrohttpd
Ubuntu:24.04:LTS
 All versions, plus listed versions
0.9.75-6ubuntu11.0.0-2ubuntu11.0.0-2.1ubuntu11.0.0-2.1ubuntu2
 None known
libmicrohttpd
Ubuntu:25.10
 All versions, plus listed versions
1.0.1-2
 None known
libmicrohttpd
Ubuntu:26.10
 All versions, plus listed versions
1.0.1-21.0.6-11.0.7-11.0.9-11.0.10-1
 None known
libmicrohttpd
Ubuntu:26.04:LTS
 All versions, plus listed versions
1.0.1-21.0.2-1
 None known
libmicrohttpd
openSUSE:Leap 16.0
From an advisory covering 2 CVEs
 before 1.0.1-160000.3.1
1.0.1-160000.3.1

History

History
RecordedChangedSources
affected
factsOSV
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-59777 is a high vulnerability (CVSS 8.7) in Gnu Libmicrohttpd, published November 10, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.48%, the 42nd percentile. Fixed in libmicrohttpd 0.9.77-4.

References

Show 11 moreShow less
Pages All vulnerabilities Browse Docs Sources Guide Get API key
MoveEnter Open