CVE catalog

CVE-2026-6986

Severity: Low · CVSS 3.7CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Published: Apr 25, 2026, 4:30:13 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.22% · Oct 25, 2026

A security vulnerability has been detected in Cesanta Mongoose up to 7.20. This issue affects the function mg_aes_gcm_decrypt of the file /src/tls_aes128.c of the component GCM Authentication Tag Handler. Such manipulation leads to improper verification of cryptographic signature. The attack may be performed from remote. A high complexity level is associated with this attack. The exploitability is assessed as difficult. The exploit has been disclosed publicly and may be used. Upgrading to version 7.21 is capable of addressing this issue. It is advisable to upgrade the affected component. VulDB has contacted the vendor early and they confirmed quickly, that this issue got fixed already.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	swupdate	sid	`2026.05.1+git20261001+dfsg-2`	fixed
Debian	swupdate	forky	`2026.05.1+git20261001+dfsg-2`	fixed
Debian	swupdate	trixie	`2024.12.1+dfsg-3+deb13u2`	vulnerable
Debian	swupdate	bookworm	`2022.12+dfsg-4+deb12u2`	vulnerable
Debian	swupdate	bookworm-security	`2022.12+dfsg-4+deb12u3`	vulnerable
Cpe	swupdate	Not reported	Not reported	vulnerable
Cpe	mongoose	Not reported	`7.21`	fixed
Cpe	mongoose	Not reported	`7.21`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	swupdate	source	sid	`2025.12+dfsg-10`	not yet assigned	Not reported	Not reported
Debian	swupdate	source	forky	`2025.12+dfsg-10`	not yet assigned	Not reported	Not reported
Debian	swupdate	source	trixie	`(unfixed)`	not yet assigned	Not reported	Not reported
Debian	swupdate	source	bookworm	`(unfixed)`	not yet assigned	Not reported	Not reported
Cpe	mongoose	cpe	Not reported	`7.21`	Not reported	Not reported	Not reported
Cpe	mongoose	cpe	Not reported	`7.21`	Not reported	NVD-CVE-2026-6986	Not reported

Notes

[trixie] swupdate: Minor issue [bookworm] swupdate: Minor issue

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libswupdate0.1]Affected
Source package: [swupdate]
Details (4)
- 2022.12+dfsg-4+deb12u2 · amd64 · bookworm
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
- 2022.12+dfsg-4+deb12u2 · arm64 · bookworm
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
- 2024.12.1+dfsg-3~bpo12+1 · amd64 · bookworm-backports
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
- 2024.12.1+dfsg-3~bpo12+1 · arm64 · bookworm-backports
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
[libswupdate-dev]Affected
Source package: [swupdate]
Details (4)
- 2022.12+dfsg-4+deb12u2 · amd64 · bookworm
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
- 2022.12+dfsg-4+deb12u2 · arm64 · bookworm
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
- 2024.12.1+dfsg-3~bpo12+1 · amd64 · bookworm-backports
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
- 2024.12.1+dfsg-3~bpo12+1 · arm64 · bookworm-backports
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
[lua-swupdate]Affected
Source package: [swupdate]
Details (4)
- 2022.12+dfsg-4+deb12u2 · amd64 · bookworm
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
- 2022.12+dfsg-4+deb12u2 · arm64 · bookworm
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
- 2024.12.1+dfsg-3~bpo12+1 · amd64 · bookworm-backports
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
- 2024.12.1+dfsg-3~bpo12+1 · arm64 · bookworm-backports
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
[swupdate]Affected
Details (4)
- 2022.12+dfsg-4+deb12u2 · amd64 · bookworm
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
- 2022.12+dfsg-4+deb12u2 · arm64 · bookworm
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
- 2024.12.1+dfsg-3~bpo12+1 · amd64 · bookworm-backports
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
- 2024.12.1+dfsg-3~bpo12+1 · arm64 · bookworm-backports
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
[swupdate-doc]Affected
Source package: [swupdate]
Details (4)
- 2022.12+dfsg-4+deb12u2 · all · bookworm
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
- 2022.12+dfsg-4+deb12u2 · all · bookworm
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
- 2024.12.1+dfsg-3~bpo12+1 · all · bookworm-backports
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
- 2024.12.1+dfsg-3~bpo12+1 · all · bookworm-backports
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
[swupdate-www]Affected
Source package: [swupdate]
Details (4)
- 2022.12+dfsg-4+deb12u2 · all · bookworm
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
- 2022.12+dfsg-4+deb12u2 · all · bookworm
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
- 2024.12.1+dfsg-3~bpo12+1 · all · bookworm-backports
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
- 2024.12.1+dfsg-3~bpo12+1 · all · bookworm-backports
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12

[Debian 13 (Trixie)]

[libswupdate0.1]Affected
Source package: [swupdate]
Details (4)
- 2024.12.1+dfsg-3+deb13u2 · amd64 · trixie
  Affected
  nvd · swupdate · debian · 13
- 2024.12.1+dfsg-3+deb13u2 · arm64 · trixie
  Affected
  nvd · swupdate · debian · 13
- 2026.05.1+dfsg-1~bpo13+1 · amd64 · trixie-backports
  Affected
  nvd · swupdate · debian · 13
- 2026.05.1+dfsg-1~bpo13+1 · arm64 · trixie-backports
  Affected
  nvd · swupdate · debian · 13
[libswupdate-dev]Affected
Source package: [swupdate]
Details (4)
- 2024.12.1+dfsg-3+deb13u2 · amd64 · trixie
  Affected
  nvd · swupdate · debian · 13
- 2024.12.1+dfsg-3+deb13u2 · arm64 · trixie
  Affected
  nvd · swupdate · debian · 13
- 2026.05.1+dfsg-1~bpo13+1 · amd64 · trixie-backports
  Affected
  nvd · swupdate · debian · 13
- 2026.05.1+dfsg-1~bpo13+1 · arm64 · trixie-backports
  Affected
  nvd · swupdate · debian · 13
[lua-swupdate]Affected
Source package: [swupdate]
Details (4)
- 2024.12.1+dfsg-3+deb13u2 · amd64 · trixie
  Affected
  nvd · swupdate · debian · 13
- 2024.12.1+dfsg-3+deb13u2 · arm64 · trixie
  Affected
  nvd · swupdate · debian · 13
- 2026.05.1+dfsg-1~bpo13+1 · amd64 · trixie-backports
  Affected
  nvd · swupdate · debian · 13
- 2026.05.1+dfsg-1~bpo13+1 · arm64 · trixie-backports
  Affected
  nvd · swupdate · debian · 13
[swupdate]Affected
Details (4)
- 2024.12.1+dfsg-3+deb13u2 · amd64 · trixie
  Affected
  nvd · swupdate · debian · 13
- 2024.12.1+dfsg-3+deb13u2 · arm64 · trixie
  Affected
  nvd · swupdate · debian · 13
- 2026.05.1+dfsg-1~bpo13+1 · amd64 · trixie-backports
  Affected
  nvd · swupdate · debian · 13
- 2026.05.1+dfsg-1~bpo13+1 · arm64 · trixie-backports
  Affected
  nvd · swupdate · debian · 13
[swupdate-doc]Affected
Source package: [swupdate]
Details (4)
- 2024.12.1+dfsg-3+deb13u2 · all · trixie
  Affected
  nvd · swupdate · debian · 13
- 2024.12.1+dfsg-3+deb13u2 · all · trixie
  Affected
  nvd · swupdate · debian · 13
- 2026.05.1+dfsg-1~bpo13+1 · all · trixie-backports
  Affected
  nvd · swupdate · debian · 13
- 2026.05.1+dfsg-1~bpo13+1 · all · trixie-backports
  Affected
  nvd · swupdate · debian · 13
[swupdate-www]Affected
Source package: [swupdate]
Details (4)
- 2024.12.1+dfsg-3+deb13u2 · all · trixie
  Affected
  nvd · swupdate · debian · 13
- 2024.12.1+dfsg-3+deb13u2 · all · trixie
  Affected
  nvd · swupdate · debian · 13
- 2026.05.1+dfsg-1~bpo13+1 · all · trixie-backports
  Affected
  nvd · swupdate · debian · 13
- 2026.05.1+dfsg-1~bpo13+1 · all · trixie-backports
  Affected
  nvd · swupdate · debian · 13

Observed: Oct 27, 2026, 10:28:13 AM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]